Spatial, environmental, and material resources are important for tidal flats and wetlands, thus, a harmonious balance between utilization and protection should be maintained. In the present study, the concept of tidal...Spatial, environmental, and material resources are important for tidal flats and wetlands, thus, a harmonious balance between utilization and protection should be maintained. In the present study, the concept of tidal flat is defined, and its spatial limitation is also clarified. Located at the Yangtze Estuary, tidal flats in Shanghai area are selected for study. The relationship between water discharge and sediment transport of the Yangtze River, allowed exploration intensity and needs for wetland protection are discussed in the paper. The dynamic process and changing trend for different types of tidal flats are illustrated in detail. Regulations are proposed for a reasonable exploitation, dynamic protection, and ecosystem restoration of each individual tidal fiat and wetland. Some valuable suggestions are put forward for further study about the sustain＇able exploitation of offshore resources in Shanghai area.展开更多
Through extensive access to party history materials,combined with professional knowledge,the existing red resources in Shanghai are studied from multi-dimensional,multi-level and multi-integration perspectives,to lear...Through extensive access to party history materials,combined with professional knowledge,the existing red resources in Shanghai are studied from multi-dimensional,multi-level and multi-integration perspectives,to learn party history from a new perspective.Through ArcGIS platform,the geographical distribution of red resources in Shanghai urban area is analyzed,and classification analysis,kernel density analysis and accessibility analysis are carried out according to resource types,grade of patriotism education base and grade of heritage preservation.The existing red resources in Shanghai urban area are evaluated,and the optimization suggestions are put forward.展开更多
The Shanghai Caohejing Hi-tech Development Area was established in 1985, based on the former Shanghai Caohejing Micro-electronics Industrial Area. It was approved as a national new and hi-tech development area by the ...The Shanghai Caohejing Hi-tech Development Area was established in 1985, based on the former Shanghai Caohejing Micro-electronics Industrial Area. It was approved as a national new and hi-tech development area by the State Council in 1991.展开更多
Shanghai, China’s largest industrial city, was once more pushed forward to the economic forefront in the 1990s. Situated in the Yangtze River estuary, Shanghai is important in the opening strategy along the Yangtze R...Shanghai, China’s largest industrial city, was once more pushed forward to the economic forefront in the 1990s. Situated in the Yangtze River estuary, Shanghai is important in the opening strategy along the Yangtze River. The Chinese government announced the faster opening of the Pudong New Area, making Pudong the head of the development drive to build Shanghai into a world monetary and trade centre and promote the fast development of the Yangtze River展开更多
为探究氮(N)磷(P)养分梯度分别对滨海新围垦区植物表层(0~10 cm)细根(≤2 mm)形态特征和生物量的影响,该实验以大叶女贞为试材,采用内生长土芯(体积196.25 cm 3)施肥法对大叶女贞土壤表层(0~10 cm)的土芯分别进行氮、磷添加实验,分别设...为探究氮(N)磷(P)养分梯度分别对滨海新围垦区植物表层(0~10 cm)细根(≤2 mm)形态特征和生物量的影响,该实验以大叶女贞为试材,采用内生长土芯(体积196.25 cm 3)施肥法对大叶女贞土壤表层(0~10 cm)的土芯分别进行氮、磷添加实验,分别设每穴0、1、3、5、7、9、11、13、15、17、20 g的施肥梯度,研究N、P养分分别对土壤表层细根功能性状的影响。结果表明:(1)与对照相比,施入3 g N时,细根的长度、表面积、体积、根长密度、根表面积密度、生物量显著增加,增幅分别为62.39%、120.87%、169.97%、59.19%、106.99%和102.75%;施入5~11 g N时,以上各指标逐渐降低,当N施入量大于11 g时,无根系生长。(2)施入3 g P时,根系的总长度、表面积、体积、根长密度、根表面积密度和生物量显著增加,增幅分别为77.37%、111.15%、147.50%、73.87%、97.88%和98.05%。当P施入量大于5 g时,细根的以上指标逐渐降低,但未出现无根系的状况。施肥促使细根的形态指标和生物量发生了显著变化,植物通过改变细根构型来提高土壤养分的获取能力。综上认为,在距离树干1 m位置的表层土壤中分别施加3 g N或P可显著促进大叶女贞细根的生长。展开更多
文摘Spatial, environmental, and material resources are important for tidal flats and wetlands, thus, a harmonious balance between utilization and protection should be maintained. In the present study, the concept of tidal flat is defined, and its spatial limitation is also clarified. Located at the Yangtze Estuary, tidal flats in Shanghai area are selected for study. The relationship between water discharge and sediment transport of the Yangtze River, allowed exploration intensity and needs for wetland protection are discussed in the paper. The dynamic process and changing trend for different types of tidal flats are illustrated in detail. Regulations are proposed for a reasonable exploitation, dynamic protection, and ecosystem restoration of each individual tidal fiat and wetland. Some valuable suggestions are put forward for further study about the sustain＇able exploitation of offshore resources in Shanghai area.
基金Sponsored by General Project of Natural Science Foundation of Beijing City(8202017)2018 Beijing Municipal University Academic Human Resources Development-Youth Talent Support Program(PXM2018_014212_000043)。
文摘Through extensive access to party history materials,combined with professional knowledge,the existing red resources in Shanghai are studied from multi-dimensional,multi-level and multi-integration perspectives,to learn party history from a new perspective.Through ArcGIS platform,the geographical distribution of red resources in Shanghai urban area is analyzed,and classification analysis,kernel density analysis and accessibility analysis are carried out according to resource types,grade of patriotism education base and grade of heritage preservation.The existing red resources in Shanghai urban area are evaluated,and the optimization suggestions are put forward.
文摘The Shanghai Caohejing Hi-tech Development Area was established in 1985, based on the former Shanghai Caohejing Micro-electronics Industrial Area. It was approved as a national new and hi-tech development area by the State Council in 1991.
文摘Shanghai, China’s largest industrial city, was once more pushed forward to the economic forefront in the 1990s. Situated in the Yangtze River estuary, Shanghai is important in the opening strategy along the Yangtze River. The Chinese government announced the faster opening of the Pudong New Area, making Pudong the head of the development drive to build Shanghai into a world monetary and trade centre and promote the fast development of the Yangtze River
文摘为探究氮(N)磷(P)养分梯度分别对滨海新围垦区植物表层(0~10 cm)细根(≤2 mm)形态特征和生物量的影响,该实验以大叶女贞为试材,采用内生长土芯(体积196.25 cm 3)施肥法对大叶女贞土壤表层(0~10 cm)的土芯分别进行氮、磷添加实验,分别设每穴0、1、3、5、7、9、11、13、15、17、20 g的施肥梯度,研究N、P养分分别对土壤表层细根功能性状的影响。结果表明:(1)与对照相比,施入3 g N时,细根的长度、表面积、体积、根长密度、根表面积密度、生物量显著增加,增幅分别为62.39%、120.87%、169.97%、59.19%、106.99%和102.75%;施入5~11 g N时,以上各指标逐渐降低,当N施入量大于11 g时,无根系生长。(2)施入3 g P时,根系的总长度、表面积、体积、根长密度、根表面积密度和生物量显著增加,增幅分别为77.37%、111.15%、147.50%、73.87%、97.88%和98.05%。当P施入量大于5 g时,细根的以上指标逐渐降低,但未出现无根系的状况。施肥促使细根的形态指标和生物量发生了显著变化,植物通过改变细根构型来提高土壤养分的获取能力。综上认为,在距离树干1 m位置的表层土壤中分别施加3 g N或P可显著促进大叶女贞细根的生长。
