By the methods of sampling soil profiles which A,B,and C represent humus horizons,illuvial horizons,and parent materials horizons respectively,relationships between the activities of soil enzymes (which include catala...By the methods of sampling soil profiles which A,B,and C represent humus horizons,illuvial horizons,and parent materials horizons respectively,relationships between the activities of soil enzymes (which include catalase,invertase,protease,and acid phosphatase) and plant species diversity in three secondary successional plant communitites of forest ecosystem in Mt.Jinyun were studied in this paper.Results showed that different degree′s correlations existed between soil enzymic activities and plant species diversity indice (PSDI) which included Shannon-Wiener H′ index and Hill′s species diversity indice family \%N A\%,moreover,the degree of correlation depended on the horizon of soils,the type of enzymes,and the life form of plants (i.e.,tree,or shrub or grass).The degree of correlation between PSDI and soilenzymic activities decreased by the orders of A→B→C.The most significant correlation with PSDI was the activity of soil catalase,and in turn,was the activity of soil invertase,On the whole,the correlation between soil enzymic activities and tree layer′s PSDI was the most evident.Tree layer′s PSDI were positively and significantly (P<0.05) or very significantly (P<0.01) correlated with the activities of catalase and invertase of A and B horizons,and of protease and acid phosphatase of A horizons.Grass layer′s PSDI were also positively and significantly (P<0.05) correlated with the activities of catalase and invertase of A horizons.Shrub layer′s PSDI were not significantly correlated with soil enzymic activities.展开更多
Distribution characteristics of soil phosphorus availability and its correlations with plant species diversity in the forest ecosystem of Mt.Jinyun are studied in this paper.The results are as follows:①Available P of...Distribution characteristics of soil phosphorus availability and its correlations with plant species diversity in the forest ecosystem of Mt.Jinyun are studied in this paper.The results are as follows:①Available P of soil profile in different communities has an evident gradient,i.e.,A(humus layer)>B(deposition layer)>C(parent material layer).②Except for shrub-grassland,soil available P content orderly increases along the successional directions,i.e.,Pinus massoniana forest<P.massonia-Symplocos setchuensis mixed forest<evergreen broadleaved forest.③Different degree’s of correlations exist between soil available P and plant species diversity.The correlation between tree diversity and available P content of A and B layers is very significant.展开更多
The distribution characteristics of soil available K and its correlations with plant species diversity in the forest ecosystem of Mt.Jinyun are studied in this paper.The results are as follows:①Except for shrub-grass...The distribution characteristics of soil available K and its correlations with plant species diversity in the forest ecosystem of Mt.Jinyun are studied in this paper.The results are as follows:①Except for shrub-grassland,the content of available K in soil profiles under different communities has an evident gradient,i.e.,A(humus horizon)>B(deposited horizon)>C(parent material horizon).②The content of available K in A and B horizons gradually increases along the successional direction,i.e.,shrub-grassland<Pinus massoniana pure forest<P.massoniana-Symplocos setchuensis mixed forest<evergreen broadleaved forest.This law does not exist in the C horizons.③Different degrees of correlations exist between the content of soil available K and plant species diversity.The correlation between species diversities of trees and grasses and the content of available K in A and B horizons is the most significant.展开更多
Soil enzyme system plays an active role in the soil biochemical process and is closely related with the circulation of materials such as carbon, nitrogen, phosphorus and sulfur, etc., and energy flow in the ecosystem....Soil enzyme system plays an active role in the soil biochemical process and is closely related with the circulation of materials such as carbon, nitrogen, phosphorus and sulfur, etc., and energy flow in the ecosystem. Thus it is important research field in the ecology, forestry, agronomy and environmental sciences. Soil enzymology experiences a longer establishing and developing process. Presently, soil enzymology mainly pays attention to investigating soil enzyme activity in ecosystem process, measuring soil enzyme activity used as the integrative bioinicators of soil quality and pollution parameter, elucidating the linkages between soil biology and soil enzyme activity, and explaining the relationships between soil ecological conditions and soil enzyme activity. Due to integrating with landscape ecology, ecosystem ecology, soil zoology, soil microbiology and molecular biology, soil enzymology is being in progress on molecular and landscape levels. Moreover, it plays an important role in improving soil quality and exploring mechanism on ecosystem restoration and rehabilitation owing to combination with agricultural practices and environmental protection. Due to function and ecological significance of soil enzyme, discussions including soil enzyme system differentiation mechanism in ecosystem process, linkages between soil enzyme diversity and functional diversity, combination with the solutions to increasingly urgent ecological environmental problems and innovation on research techniques, and integration and intercross of soil enzymology with other disciplines, etc., will be the most important trends and aspects of soil enzymology in twenty first century. It is suggested that interactive effects between soil enzymes and key ecosystem process be studied from the aspects of soil enzyme system differentiation and ecosystem process. Ref展开更多
Concept and theoretical system of soil ecology are briefly introduced,and main research fields which should be given priority to and currently developed are put forward in this
文摘By the methods of sampling soil profiles which A,B,and C represent humus horizons,illuvial horizons,and parent materials horizons respectively,relationships between the activities of soil enzymes (which include catalase,invertase,protease,and acid phosphatase) and plant species diversity in three secondary successional plant communitites of forest ecosystem in Mt.Jinyun were studied in this paper.Results showed that different degree′s correlations existed between soil enzymic activities and plant species diversity indice (PSDI) which included Shannon-Wiener H′ index and Hill′s species diversity indice family \%N A\%,moreover,the degree of correlation depended on the horizon of soils,the type of enzymes,and the life form of plants (i.e.,tree,or shrub or grass).The degree of correlation between PSDI and soilenzymic activities decreased by the orders of A→B→C.The most significant correlation with PSDI was the activity of soil catalase,and in turn,was the activity of soil invertase,On the whole,the correlation between soil enzymic activities and tree layer′s PSDI was the most evident.Tree layer′s PSDI were positively and significantly (P<0.05) or very significantly (P<0.01) correlated with the activities of catalase and invertase of A and B horizons,and of protease and acid phosphatase of A horizons.Grass layer′s PSDI were also positively and significantly (P<0.05) correlated with the activities of catalase and invertase of A horizons.Shrub layer′s PSDI were not significantly correlated with soil enzymic activities.
文摘Distribution characteristics of soil phosphorus availability and its correlations with plant species diversity in the forest ecosystem of Mt.Jinyun are studied in this paper.The results are as follows:①Available P of soil profile in different communities has an evident gradient,i.e.,A(humus layer)>B(deposition layer)>C(parent material layer).②Except for shrub-grassland,soil available P content orderly increases along the successional directions,i.e.,Pinus massoniana forest<P.massonia-Symplocos setchuensis mixed forest<evergreen broadleaved forest.③Different degree’s of correlations exist between soil available P and plant species diversity.The correlation between tree diversity and available P content of A and B layers is very significant.
文摘The distribution characteristics of soil available K and its correlations with plant species diversity in the forest ecosystem of Mt.Jinyun are studied in this paper.The results are as follows:①Except for shrub-grassland,the content of available K in soil profiles under different communities has an evident gradient,i.e.,A(humus horizon)>B(deposited horizon)>C(parent material horizon).②The content of available K in A and B horizons gradually increases along the successional direction,i.e.,shrub-grassland<Pinus massoniana pure forest<P.massoniana-Symplocos setchuensis mixed forest<evergreen broadleaved forest.This law does not exist in the C horizons.③Different degrees of correlations exist between the content of soil available K and plant species diversity.The correlation between species diversities of trees and grasses and the content of available K in A and B horizons is the most significant.
文摘Soil enzyme system plays an active role in the soil biochemical process and is closely related with the circulation of materials such as carbon, nitrogen, phosphorus and sulfur, etc., and energy flow in the ecosystem. Thus it is important research field in the ecology, forestry, agronomy and environmental sciences. Soil enzymology experiences a longer establishing and developing process. Presently, soil enzymology mainly pays attention to investigating soil enzyme activity in ecosystem process, measuring soil enzyme activity used as the integrative bioinicators of soil quality and pollution parameter, elucidating the linkages between soil biology and soil enzyme activity, and explaining the relationships between soil ecological conditions and soil enzyme activity. Due to integrating with landscape ecology, ecosystem ecology, soil zoology, soil microbiology and molecular biology, soil enzymology is being in progress on molecular and landscape levels. Moreover, it plays an important role in improving soil quality and exploring mechanism on ecosystem restoration and rehabilitation owing to combination with agricultural practices and environmental protection. Due to function and ecological significance of soil enzyme, discussions including soil enzyme system differentiation mechanism in ecosystem process, linkages between soil enzyme diversity and functional diversity, combination with the solutions to increasingly urgent ecological environmental problems and innovation on research techniques, and integration and intercross of soil enzymology with other disciplines, etc., will be the most important trends and aspects of soil enzymology in twenty first century. It is suggested that interactive effects between soil enzymes and key ecosystem process be studied from the aspects of soil enzyme system differentiation and ecosystem process. Ref
文摘Concept and theoretical system of soil ecology are briefly introduced,and main research fields which should be given priority to and currently developed are put forward in this
