Although a number of studies have been published in the general area on various factors affecting the ecologicalization of urban industrial structure,little work has been carried out for empirical studies quantitative...Although a number of studies have been published in the general area on various factors affecting the ecologicalization of urban industrial structure,little work has been carried out for empirical studies quantitatively analyzing the relevance between green finance development and the ecologicalization of urban industrial structure.Therefore,based on a comprehensive index of green finance development,this research employs panel data of target cities1 for the period 2012–2020 to explore the influence of green finance on the ecologicalization of urban industrial structure.The empirical results show that green finance development significantly improves the ecologicalization level of urban industrial structure.In addition,it is found that green finance plays a stronger role in promoting the ecologicalization of industrial structure in economically developed regions than in economically underdeveloped regions2.The research results can provide a valuable policy reference for urban green financial market planning and green product innovation.展开更多
By using ecological carrying capacity, ecological footprint method and shift-share analysis and the data from Yunnan Statistical Yearbook and China Statistical Yearbook, the status quo of industrial ecologicalization ...By using ecological carrying capacity, ecological footprint method and shift-share analysis and the data from Yunnan Statistical Yearbook and China Statistical Yearbook, the status quo of industrial ecologicalization development in Yunnan Province is analyzed from the aspects of consumption of resources and environment, production technology and industrial pollution and industrial structure. The results show that the economic growth in Yunnan Province is based on the huge consumption of resources; the consumption of natural environment has surpassed its carrying capacity; the production technology is relatively backward and the comprehensive use efficiency of the "three wastes" is low; the solid waste emission of the ten thousand GDP far exceeds the average level of the whole county; the total emissions of industrial waste gas and domestic sewage are increasing; the efficiency of industrial structure is bad. On the strength of the analysis, the relevant measures on ecological industrial development in Yunnan Province is put forward, covering strengthening the awareness of saving resources and protecting environment; establishing energy-saving type national economy and social system; actively adjusting industrial structure; strengthening ecological construction of the three major industries.展开更多
Under the target of the sustainable development,optimization of forestry industrial structure contains rationalization and advancement of forestry industrial structure in the traditional sense,as well as ecologicaliza...Under the target of the sustainable development,optimization of forestry industrial structure contains rationalization and advancement of forestry industrial structure in the traditional sense,as well as ecologicalization of forestry industrial structure.The connotation of optimization of forestry industrial structure is analyzed at first,and then the paper chooses the typical evaluation indexes from the three sides of rationalization,advancement and ecologicalization to evaluate the current situation of the regional forestry industrial structure.With the aid of the theory of fuzzy mathematics and information entropy,the paper establishes a fuzzy evaluation model which is based on information entropy for optimization of forestry industrial structure,and the evaluation model is applied in the study for the current situation of forestry industrial structure from 2000 to 2006 in Hubei province.The results show that the grade of forestry industrial structure is bad basically during the research,of which the overall level of forestry industrial structure of Hubei province is poor,the degree of utilizing forest resource is lower,and ecological environment in the forest region has been damaged to some extent.On this basis,the author presents the countermeasure to promote the optimization of forestry industrial structure.展开更多
Ecologicalization of technology will improve resource utilization; it can realize waste minimization and recycling. Enterprises' ecologicalization of technology is a must choice of the sustainable development. Eco...Ecologicalization of technology will improve resource utilization; it can realize waste minimization and recycling. Enterprises' ecologicalization of technology is a must choice of the sustainable development. Ecologicalization of technology needs support of public opinion and ethics, needs law and system. The path to realize enterprises' ecologicalization of technology is striving to develop ecological techniques.展开更多
Scientific field management is an important path to realize ecological production and sustainable development of agriculture.As the main content of field management,nitrogen(N)management is the key to balance the econ...Scientific field management is an important path to realize ecological production and sustainable development of agriculture.As the main content of field management,nitrogen(N)management is the key to balance the economic and ecological benefits of agricultural production.In the loess hilly-gully region,for the fragile ecological and social system,ecologicalization of agricultural production is an important direction to promote sustainable agricultural development.However,irrational fertilization has been one of the main constraint factors,hindering the ecologicalization of local agriculture.In order to solve the problem and prove the practical significance of field management to ecologicalization of agriculture,this study aimed at evaluating the effects of different N fertilization rates and timing using Root Zone Water Quality Model(RZWQM)and then optimizing the N management.Experiments were conducted from 2018 to 2019 in Yangjuangou watershed,loess hilly-gully region,to calibrate and validate the model.The root mean square error(RMSE)of soil water content,nitrate N concentration,above-ground biomass,leaf area index ranged from 10.5-13.5 mm,2.96-3.80 mg·kg^(−1),730.3-1273.9 kg·ha^(−1)and 0.26-0.38,respectively,with the agreement index(d)between observed and simulated values ranging between 0.88 to 0.98.Simulation results showed that N leaching in semi-arid areas was also quite high due to concentrated rainfall and loose soil,which had previously been neglected.When the fertilization rate decreased by 35%(applying the chemical fertilizer at rate of 245.7 kg N ha^(−1))of typical fertilization(applying the chemical fertilizer at rate of 378.0 kg N ha^(−1)),the leaching and residual N decreased by 72.2%-75.4%and 35.6%-50.9%,respectively,while NUE increased by 41.5%-45.2%with no reduction in maize yield.Additionally,compared with applying additional N at seedling stage in one batch,applying at seedling and jointing stages in two batches further decreased N leaching and improved NUE.Thus,a 35%reduction of typical fertilization rate combined with applying additional N at seedling and jointing stages is recommended.From the perspective of N management,this study demonstrated optimizing field management can play a positive role in the ecologicalization of agriculture,and more field management measures should be explored.展开更多
The Beijing-Tianjin-Hebei region is one of the regions with the most dynamic economies,highest degrees of openness,strongest innovation capacities and largest populations,as well as an important engine driving China’...The Beijing-Tianjin-Hebei region is one of the regions with the most dynamic economies,highest degrees of openness,strongest innovation capacities and largest populations,as well as an important engine driving China’s economic development.Currently,the development of the BeijingTianjin-Hebei region faces many difficulties,including an inefficient distribution of regional functions,imbalance in industrial structure,low sophistication,and serious overburdening of resources and the environment.Promoting the overall coordinated development of the region has become an urgent challenge.In this paper,according to the conventions of industrial structure optimization,the three core indicators of regional industrial structure rationalization,sophistication and ecologicalization are constructed.With the help of the grey dynamic correlation model,the three indicators are coupled with the economic growth rate,and the industrial structure optimization index of the Beijing-Tianjin-Hebei region is comprehensively measured.The study shows that rationalization of the industrial structure in the Beijing-Tianjin-Hebei region is increasing but that this trend is not obvious;sophistication of the industrial structure is relatively high and has also been operating at a high level;however,the overall ecological level of the industrial structure in the Beijing-Tianjin-Hebei region is not high and presents the characteristics of high in the middle and low at both ends.In terms of the relationship between industrial structure and economic growth in the Beijing-Tianjin-Hebei region,ecologicalization of the industrial structure has the greatest influence on economic growth,followed by sophistication of the industrial structure,and rationalization of the industrial structure has the weakest influence.展开更多
Landscape architecture industry throughout decades of rapid development has made great contributions to national environment, improvement of city and ecological conditions. Against the background of worldwide economic...Landscape architecture industry throughout decades of rapid development has made great contributions to national environment, improvement of city and ecological conditions. Against the background of worldwide economic depression, increasing national investment, it is advocated that more investments should be input for the landscape architecture industry, and special funds set for the industry. Park and garden construction echoes with the country and people's needs for environmental beautification, ecological improvement, preservation of natural resources and sustainable development, so as to obtain the most ecological benefi ts and social benefi ts with the least input, and create beautiful living environment, as well as long-term and sustainable economic benefi ts.展开更多
The area around the oasis, lying between the oasis and the natural desert and encirclesthe oasis is different from ecotone of the oasis and the desert, because it is not the trans-forming area betwen them, but it is e...The area around the oasis, lying between the oasis and the natural desert and encirclesthe oasis is different from ecotone of the oasis and the desert, because it is not the trans-forming area betwen them, but it is ecological rift valley or ecological burst zone. The oasisbase will be shaked and the nature desert will be degenerative too. It is the crux of the envi-展开更多
The Green Corridor in the lower reaches of the Tarim River is not only a unique natural landscape in desert but also an important passageway. Nowadays, the ecologic environment of the corridor is getting worse and wor...The Green Corridor in the lower reaches of the Tarim River is not only a unique natural landscape in desert but also an important passageway. Nowadays, the ecologic environment of the corridor is getting worse and worse due to man’s economic activities and the lack of knowledge of the importance of the environment, which is one of is the three environment problems in Xinjiang. The corridor is in great need of planning and managing.展开更多
On the basis of brief description of current situation of old industrial bases and primary industry of Liaoning Province, the paper introduces the general situation of agriculture-ecological zoning plan in Liaoning Pr...On the basis of brief description of current situation of old industrial bases and primary industry of Liaoning Province, the paper introduces the general situation of agriculture-ecological zoning plan in Liaoning Province. First, the ecological bases of agricultural zoning plan are introduced through various topographic and geomorphic types, regional climate differences and imbalanced distribution of natural resources; Second, in accordance with the theory of comparative advantage, distribution of production and resource economics, on the basis of comprehensive evaluation of agricultural natural resources, with the principle of fully excavating economic function of different natural resources, and in order to improve allocation efficiency of the two resources of market and government, the formation of ecological zoning plan of agriculture in Liaoning Province is analyzed; Third, according to Regional Layout Planning of Characteristic Agricultural Products of Liaoning Province (2006-2010), the paper describes basic layout of agriculture-ecological zoning plan in Liaoning Province. The policy support of agriculture-ecological zoning plan in Liaoning Province is analyzed from three aspects-support policy of functional zone major in producing grain, support policy of other characteristic agriculture-ecological zone and support measures of development of agriculture-ecological zone. The paper also analyzes experiences of agricultural development of old industrial bases in ecological zoning plan: First, agriculture-ecological zoning plan is a effective way of the revitalization of old industrial bases; Second, scientificity of plan is the basis of improving competitiveness of regional agriculture; Third, multi-input mechanism guiding by government is the key of agricultural packing effect; Fourth, integrated agricultural industrial chain is guarantee of realizing industrialization in ecological zone.展开更多
We present and discuss the partial oscillation with respect to equilibrium state ofm-dimensional Logistic delay ecologic models, and obtain some simple criteria.
Mongolian Plateau is located in the center of Asia, remote from oceans and sur-rounded by mountains of various heights. It is a closed inland plateau and a special land-scape ecological region in the Euro-Asia Contine...Mongolian Plateau is located in the center of Asia, remote from oceans and sur-rounded by mountains of various heights. It is a closed inland plateau and a special land-scape ecological region in the Euro-Asia Continent. Mongolian Plateau includes the landof the Republic of Mongolian and Inner Mongoilia of China. It covers a area of 34°36′longitude (E87°40′-E122°15′) and 15°22′latitude (N37°46′-N53°08′). Thispaper briefly describes the landscape feature and ecological division of this region.展开更多
Schistosomiasis is a parasitic disease mostly found in areas along the Changjiang River of China. The disease is spread solely through an intermediary named oncomelania, so its spread of schistosomiasis can be control...Schistosomiasis is a parasitic disease mostly found in areas along the Changjiang River of China. The disease is spread solely through an intermediary named oncomelania, so its spread of schistosomiasis can be controlled by properly designing water intakes which prevent oncomelania from entering farming land or residential areas. This paper reports a successful design process and a new oncomelania free intake device. The design of the new intake is based on a sound research program in which extensive experimental studies were carried out to gain knowledge of oncomelania eco hydraulic behavior and detailed flow field information through CFD simulation.展开更多
From the presentation, connotation, characteristics, principles, pattern, and technologies of ecological agriculture with high efficiency, we conduct comprehensive and systematic analysis and discussion of the theoret...From the presentation, connotation, characteristics, principles, pattern, and technologies of ecological agriculture with high efficiency, we conduct comprehensive and systematic analysis and discussion of the theoretical and practical progress of ecological agriculture with high efficiency. (i) Ecological agriculture with high efficiency was first advanced in China in 1991. (ii) Ecological agriculture with high efficiency highlights "high efficiency", "ecology", and "combination". (iii) Ecological agriculture with high efficiency is characterized by diverse organisms, good environment, good structure, powerful function, good quality, high benefit, low emission, sustainability. (iv) The yield increase and efficiency increase principle of ecological agriculture with high efficiency lies in full land use, three-dimensional light use, sufficient use of season, multi-layer water consumption, efficient fertilizer consumption, symbiosis and mutual supplement, ecological disaster reduction, recycling. (v) The typical pattern of ecological agriculture with high efficiency includes three-dimensional use pattern, biological symbiosis pattern, multi-industry combination pattern, industrial extension pattern, technology-driven pattern, environmental renovation pattern, resource recycling pattern, leisure and sight-seeing pattern. (vi) The key technologies of ecological agriculture with high efficiency include resource-saving technology, water and fertilizer regulation technology, biological technology for increasing soil fertility, disaster prevention and mitigation technology, comprehensive utilization technology, water conservation technology, structural adjustment technology, energy development technology, watershed control technology, and modern high-tech technology.展开更多
The fragile eco-environment is a special type of ecosystem,its response to the change of environmental condi -tions is very susceptive.So it is rather prone to be disturbed under unfav orable conditions.Human activity...The fragile eco-environment is a special type of ecosystem,its response to the change of environmental condi -tions is very susceptive.So it is rather prone to be disturbed under unfav orable conditions.Human activity h as greatly changed the geo-chemical process in the ecosystem,thus caused a series o f positive and negative effects.In t he ecosys-tem,especially in the fragile eco-e nvironment,different systems and r egimes are interconnected and interdetermined.For the suntainable development of ecosystem and the protection and rational utilization of resources,it is of great impor-tance to study these internal relati onships and seek rational regulatio n and control measure.This paper tak es the fragile eco-environment in the west of the Songnen Plain as an example.Based on th e study of the topograph,physiognom y,soil,vegetation and their geographic distribution in the landscape,th e paper explains the structure of the ecologic land-scape and quantifies the ecologic ge o-chemical processes under differe nt landscape conditions.In additio n,the paper al-so tries making coupling analyses of the ecologic succession and the landscape geochemical environment.And in the pa-per,some research results are given.展开更多
Agricultural production activities are organic combinations between the courses of nat-ural reproduction and economic one. Natural reproduction course is the material base forthe agro-ecological and economic system un...Agricultural production activities are organic combinations between the courses of nat-ural reproduction and economic one. Natural reproduction course is the material base forthe agro-ecological and economic system uniformly operating. So the development ofagro-production has closely concerned with the ecological circumstances. The serious wat-展开更多
Situated in the arid area in the inland of the Central Asia,the reaches of the Tarim River possesses unique natural conditions. Being one of the most concentrated Populus euphratica distributing areas,it is a comparat...Situated in the arid area in the inland of the Central Asia,the reaches of the Tarim River possesses unique natural conditions. Being one of the most concentrated Populus euphratica distributing areas,it is a comparatively big ecosystem.Due to the human effect during the recent 30 years,especially the lack of overall planning of exploitation and utilization of water resources and poor awareness of ecologic protection, resources of the whole reaches and its ecologic environment is deteriorating, which rouses the attention from home and abroad.The programme being carried out is based on protecting the ecologic environment of the reaches of the Tarim River. The task is to protect ecologic environment,improve and restore the existing natural vegetation in order to prevent land desertification.展开更多
The Lanni River, rising at Laojunpo, Huining County, Gansu Province, entersNingxia at Libaocun, Sanhexiang, Xiji County. It flows through 10 villages and joints theHulu River at Gongyixiang, Xiji County and finally fl...The Lanni River, rising at Laojunpo, Huining County, Gansu Province, entersNingxia at Libaocun, Sanhexiang, Xiji County. It flows through 10 villages and joints theHulu River at Gongyixiang, Xiji County and finally flows through the Wei River into theYellow River. The section of the river within Xiji County is 44.8 km long with a展开更多
The paper describes the water resources in the irrigated area of Ningxia, China, andthe methods for improving the utilization of the water resources, and puts forward somesuggestions so as to utilize the water resourc...The paper describes the water resources in the irrigated area of Ningxia, China, andthe methods for improving the utilization of the water resources, and puts forward somesuggestions so as to utilize the water resources rationally. The history of irrigation farming in Ningxia can be traced back to more than two thou-展开更多
As a widespread natural phenomenon, disturbances are considered a discrete event occurring in a natural ecosystem within various spatial and temporal scales. The present paper discusses the types of disturbances and t...As a widespread natural phenomenon, disturbances are considered a discrete event occurring in a natural ecosystem within various spatial and temporal scales. The present paper discusses the types of disturbances and their influence on the ecologic system in nature reserves. It is shown that nature reserves are facing a great challenge dealing with these disturbances. A rational control for disturbances should be improved in order to promote the healthy development of nature reserves this could be done by enhancing the publicity and training of environment protection, coupling management with communities around and other nature reserves, effective management methods, rational planning, and supporting nature servers.展开更多
基金supported by Shandong Province Key Research and Development Program(Soft Science Project)(No.2021RKY01007).
文摘Although a number of studies have been published in the general area on various factors affecting the ecologicalization of urban industrial structure,little work has been carried out for empirical studies quantitatively analyzing the relevance between green finance development and the ecologicalization of urban industrial structure.Therefore,based on a comprehensive index of green finance development,this research employs panel data of target cities1 for the period 2012–2020 to explore the influence of green finance on the ecologicalization of urban industrial structure.The empirical results show that green finance development significantly improves the ecologicalization level of urban industrial structure.In addition,it is found that green finance plays a stronger role in promoting the ecologicalization of industrial structure in economically developed regions than in economically underdeveloped regions2.The research results can provide a valuable policy reference for urban green financial market planning and green product innovation.
基金Supported by the Major Projects of Yunnan Economy Census(2006JP2D)
文摘By using ecological carrying capacity, ecological footprint method and shift-share analysis and the data from Yunnan Statistical Yearbook and China Statistical Yearbook, the status quo of industrial ecologicalization development in Yunnan Province is analyzed from the aspects of consumption of resources and environment, production technology and industrial pollution and industrial structure. The results show that the economic growth in Yunnan Province is based on the huge consumption of resources; the consumption of natural environment has surpassed its carrying capacity; the production technology is relatively backward and the comprehensive use efficiency of the "three wastes" is low; the solid waste emission of the ten thousand GDP far exceeds the average level of the whole county; the total emissions of industrial waste gas and domestic sewage are increasing; the efficiency of industrial structure is bad. On the strength of the analysis, the relevant measures on ecological industrial development in Yunnan Province is put forward, covering strengthening the awareness of saving resources and protecting environment; establishing energy-saving type national economy and social system; actively adjusting industrial structure; strengthening ecological construction of the three major industries.
基金supported by National Social Sciences Fund of China (Grant No 09XSH018)
文摘Under the target of the sustainable development,optimization of forestry industrial structure contains rationalization and advancement of forestry industrial structure in the traditional sense,as well as ecologicalization of forestry industrial structure.The connotation of optimization of forestry industrial structure is analyzed at first,and then the paper chooses the typical evaluation indexes from the three sides of rationalization,advancement and ecologicalization to evaluate the current situation of the regional forestry industrial structure.With the aid of the theory of fuzzy mathematics and information entropy,the paper establishes a fuzzy evaluation model which is based on information entropy for optimization of forestry industrial structure,and the evaluation model is applied in the study for the current situation of forestry industrial structure from 2000 to 2006 in Hubei province.The results show that the grade of forestry industrial structure is bad basically during the research,of which the overall level of forestry industrial structure of Hubei province is poor,the degree of utilizing forest resource is lower,and ecological environment in the forest region has been damaged to some extent.On this basis,the author presents the countermeasure to promote the optimization of forestry industrial structure.
文摘Ecologicalization of technology will improve resource utilization; it can realize waste minimization and recycling. Enterprises' ecologicalization of technology is a must choice of the sustainable development. Ecologicalization of technology needs support of public opinion and ethics, needs law and system. The path to realize enterprises' ecologicalization of technology is striving to develop ecological techniques.
基金National Natural Science Foundation of China,No.41931293The National Key Research and Development Program of China,No.2017YFC0504701。
文摘Scientific field management is an important path to realize ecological production and sustainable development of agriculture.As the main content of field management,nitrogen(N)management is the key to balance the economic and ecological benefits of agricultural production.In the loess hilly-gully region,for the fragile ecological and social system,ecologicalization of agricultural production is an important direction to promote sustainable agricultural development.However,irrational fertilization has been one of the main constraint factors,hindering the ecologicalization of local agriculture.In order to solve the problem and prove the practical significance of field management to ecologicalization of agriculture,this study aimed at evaluating the effects of different N fertilization rates and timing using Root Zone Water Quality Model(RZWQM)and then optimizing the N management.Experiments were conducted from 2018 to 2019 in Yangjuangou watershed,loess hilly-gully region,to calibrate and validate the model.The root mean square error(RMSE)of soil water content,nitrate N concentration,above-ground biomass,leaf area index ranged from 10.5-13.5 mm,2.96-3.80 mg·kg^(−1),730.3-1273.9 kg·ha^(−1)and 0.26-0.38,respectively,with the agreement index(d)between observed and simulated values ranging between 0.88 to 0.98.Simulation results showed that N leaching in semi-arid areas was also quite high due to concentrated rainfall and loose soil,which had previously been neglected.When the fertilization rate decreased by 35%(applying the chemical fertilizer at rate of 245.7 kg N ha^(−1))of typical fertilization(applying the chemical fertilizer at rate of 378.0 kg N ha^(−1)),the leaching and residual N decreased by 72.2%-75.4%and 35.6%-50.9%,respectively,while NUE increased by 41.5%-45.2%with no reduction in maize yield.Additionally,compared with applying additional N at seedling stage in one batch,applying at seedling and jointing stages in two batches further decreased N leaching and improved NUE.Thus,a 35%reduction of typical fertilization rate combined with applying additional N at seedling and jointing stages is recommended.From the perspective of N management,this study demonstrated optimizing field management can play a positive role in the ecologicalization of agriculture,and more field management measures should be explored.
基金Supported by the Beijing Municipal Natural Science Foundation of China(9192001,9202002).
文摘The Beijing-Tianjin-Hebei region is one of the regions with the most dynamic economies,highest degrees of openness,strongest innovation capacities and largest populations,as well as an important engine driving China’s economic development.Currently,the development of the BeijingTianjin-Hebei region faces many difficulties,including an inefficient distribution of regional functions,imbalance in industrial structure,low sophistication,and serious overburdening of resources and the environment.Promoting the overall coordinated development of the region has become an urgent challenge.In this paper,according to the conventions of industrial structure optimization,the three core indicators of regional industrial structure rationalization,sophistication and ecologicalization are constructed.With the help of the grey dynamic correlation model,the three indicators are coupled with the economic growth rate,and the industrial structure optimization index of the Beijing-Tianjin-Hebei region is comprehensively measured.The study shows that rationalization of the industrial structure in the Beijing-Tianjin-Hebei region is increasing but that this trend is not obvious;sophistication of the industrial structure is relatively high and has also been operating at a high level;however,the overall ecological level of the industrial structure in the Beijing-Tianjin-Hebei region is not high and presents the characteristics of high in the middle and low at both ends.In terms of the relationship between industrial structure and economic growth in the Beijing-Tianjin-Hebei region,ecologicalization of the industrial structure has the greatest influence on economic growth,followed by sophistication of the industrial structure,and rationalization of the industrial structure has the weakest influence.
文摘Landscape architecture industry throughout decades of rapid development has made great contributions to national environment, improvement of city and ecological conditions. Against the background of worldwide economic depression, increasing national investment, it is advocated that more investments should be input for the landscape architecture industry, and special funds set for the industry. Park and garden construction echoes with the country and people's needs for environmental beautification, ecological improvement, preservation of natural resources and sustainable development, so as to obtain the most ecological benefi ts and social benefi ts with the least input, and create beautiful living environment, as well as long-term and sustainable economic benefi ts.
文摘The area around the oasis, lying between the oasis and the natural desert and encirclesthe oasis is different from ecotone of the oasis and the desert, because it is not the trans-forming area betwen them, but it is ecological rift valley or ecological burst zone. The oasisbase will be shaked and the nature desert will be degenerative too. It is the crux of the envi-
文摘The Green Corridor in the lower reaches of the Tarim River is not only a unique natural landscape in desert but also an important passageway. Nowadays, the ecologic environment of the corridor is getting worse and worse due to man’s economic activities and the lack of knowledge of the importance of the environment, which is one of is the three environment problems in Xinjiang. The corridor is in great need of planning and managing.
文摘On the basis of brief description of current situation of old industrial bases and primary industry of Liaoning Province, the paper introduces the general situation of agriculture-ecological zoning plan in Liaoning Province. First, the ecological bases of agricultural zoning plan are introduced through various topographic and geomorphic types, regional climate differences and imbalanced distribution of natural resources; Second, in accordance with the theory of comparative advantage, distribution of production and resource economics, on the basis of comprehensive evaluation of agricultural natural resources, with the principle of fully excavating economic function of different natural resources, and in order to improve allocation efficiency of the two resources of market and government, the formation of ecological zoning plan of agriculture in Liaoning Province is analyzed; Third, according to Regional Layout Planning of Characteristic Agricultural Products of Liaoning Province (2006-2010), the paper describes basic layout of agriculture-ecological zoning plan in Liaoning Province. The policy support of agriculture-ecological zoning plan in Liaoning Province is analyzed from three aspects-support policy of functional zone major in producing grain, support policy of other characteristic agriculture-ecological zone and support measures of development of agriculture-ecological zone. The paper also analyzes experiences of agricultural development of old industrial bases in ecological zoning plan: First, agriculture-ecological zoning plan is a effective way of the revitalization of old industrial bases; Second, scientificity of plan is the basis of improving competitiveness of regional agriculture; Third, multi-input mechanism guiding by government is the key of agricultural packing effect; Fourth, integrated agricultural industrial chain is guarantee of realizing industrialization in ecological zone.
文摘We present and discuss the partial oscillation with respect to equilibrium state ofm-dimensional Logistic delay ecologic models, and obtain some simple criteria.
文摘Mongolian Plateau is located in the center of Asia, remote from oceans and sur-rounded by mountains of various heights. It is a closed inland plateau and a special land-scape ecological region in the Euro-Asia Continent. Mongolian Plateau includes the landof the Republic of Mongolian and Inner Mongoilia of China. It covers a area of 34°36′longitude (E87°40′-E122°15′) and 15°22′latitude (N37°46′-N53°08′). Thispaper briefly describes the landscape feature and ecological division of this region.
文摘Schistosomiasis is a parasitic disease mostly found in areas along the Changjiang River of China. The disease is spread solely through an intermediary named oncomelania, so its spread of schistosomiasis can be controlled by properly designing water intakes which prevent oncomelania from entering farming land or residential areas. This paper reports a successful design process and a new oncomelania free intake device. The design of the new intake is based on a sound research program in which extensive experimental studies were carried out to gain knowledge of oncomelania eco hydraulic behavior and detailed flow field information through CFD simulation.
基金Supported by Key Project of National Natural Science Foundation(U1033004)
文摘From the presentation, connotation, characteristics, principles, pattern, and technologies of ecological agriculture with high efficiency, we conduct comprehensive and systematic analysis and discussion of the theoretical and practical progress of ecological agriculture with high efficiency. (i) Ecological agriculture with high efficiency was first advanced in China in 1991. (ii) Ecological agriculture with high efficiency highlights "high efficiency", "ecology", and "combination". (iii) Ecological agriculture with high efficiency is characterized by diverse organisms, good environment, good structure, powerful function, good quality, high benefit, low emission, sustainability. (iv) The yield increase and efficiency increase principle of ecological agriculture with high efficiency lies in full land use, three-dimensional light use, sufficient use of season, multi-layer water consumption, efficient fertilizer consumption, symbiosis and mutual supplement, ecological disaster reduction, recycling. (v) The typical pattern of ecological agriculture with high efficiency includes three-dimensional use pattern, biological symbiosis pattern, multi-industry combination pattern, industrial extension pattern, technology-driven pattern, environmental renovation pattern, resource recycling pattern, leisure and sight-seeing pattern. (vi) The key technologies of ecological agriculture with high efficiency include resource-saving technology, water and fertilizer regulation technology, biological technology for increasing soil fertility, disaster prevention and mitigation technology, comprehensive utilization technology, water conservation technology, structural adjustment technology, energy development technology, watershed control technology, and modern high-tech technology.
文摘The fragile eco-environment is a special type of ecosystem,its response to the change of environmental condi -tions is very susceptive.So it is rather prone to be disturbed under unfav orable conditions.Human activity h as greatly changed the geo-chemical process in the ecosystem,thus caused a series o f positive and negative effects.In t he ecosys-tem,especially in the fragile eco-e nvironment,different systems and r egimes are interconnected and interdetermined.For the suntainable development of ecosystem and the protection and rational utilization of resources,it is of great impor-tance to study these internal relati onships and seek rational regulatio n and control measure.This paper tak es the fragile eco-environment in the west of the Songnen Plain as an example.Based on th e study of the topograph,physiognom y,soil,vegetation and their geographic distribution in the landscape,th e paper explains the structure of the ecologic land-scape and quantifies the ecologic ge o-chemical processes under differe nt landscape conditions.In additio n,the paper al-so tries making coupling analyses of the ecologic succession and the landscape geochemical environment.And in the pa-per,some research results are given.
文摘Agricultural production activities are organic combinations between the courses of nat-ural reproduction and economic one. Natural reproduction course is the material base forthe agro-ecological and economic system uniformly operating. So the development ofagro-production has closely concerned with the ecological circumstances. The serious wat-
文摘Situated in the arid area in the inland of the Central Asia,the reaches of the Tarim River possesses unique natural conditions. Being one of the most concentrated Populus euphratica distributing areas,it is a comparatively big ecosystem.Due to the human effect during the recent 30 years,especially the lack of overall planning of exploitation and utilization of water resources and poor awareness of ecologic protection, resources of the whole reaches and its ecologic environment is deteriorating, which rouses the attention from home and abroad.The programme being carried out is based on protecting the ecologic environment of the reaches of the Tarim River. The task is to protect ecologic environment,improve and restore the existing natural vegetation in order to prevent land desertification.
文摘The Lanni River, rising at Laojunpo, Huining County, Gansu Province, entersNingxia at Libaocun, Sanhexiang, Xiji County. It flows through 10 villages and joints theHulu River at Gongyixiang, Xiji County and finally flows through the Wei River into theYellow River. The section of the river within Xiji County is 44.8 km long with a
文摘The paper describes the water resources in the irrigated area of Ningxia, China, andthe methods for improving the utilization of the water resources, and puts forward somesuggestions so as to utilize the water resources rationally. The history of irrigation farming in Ningxia can be traced back to more than two thou-
文摘As a widespread natural phenomenon, disturbances are considered a discrete event occurring in a natural ecosystem within various spatial and temporal scales. The present paper discusses the types of disturbances and their influence on the ecologic system in nature reserves. It is shown that nature reserves are facing a great challenge dealing with these disturbances. A rational control for disturbances should be improved in order to promote the healthy development of nature reserves this could be done by enhancing the publicity and training of environment protection, coupling management with communities around and other nature reserves, effective management methods, rational planning, and supporting nature servers.
