Effects Of Different Vegetation Types On Soil Enzyme Activity And Globulin-Related Soil Proteins In Peatlands Of The Greater Xing’An Mountains

Studies in recent years have shown that global climate change has a significant impact on the development of ecosystems and human society.A large amount of organic carbon components are stored in wetland soil,and the content of organic carbon has a great impact on global climate change.Soil carbon and nitrogen as important ecological factors can maintain the stability of the ecosystem and balance the energy cycle in the ecosystem.Study different vegetation communities in wetland ecosystems to understand species diversity and abundance,so as to further maintain wetland ecosystems and provide theoretical basis for their development.Peatlands belong to a type of wetlands with special properties and outstanding landscapes,which can regulate the climate and affect the natural ecological balance.The generation of carbon in peatlands has a great impact on the global climate.Peat resources are involved in agricultural production,industrial design and environmental protection,and can drive economic development,so they have a high value in utilization.In a wetland ecosystem,microorganisms in the soil speed up the flow of energy and can also promote material circulation,so it can stabilize the system.Globulin-associated soil protein is a protein secreted by arbuscular mycorrhizal fungi into the soil and is the main source of carbon and nitrogen.This protein builds the connection between plants,fungi and soil.Changes are closely related to soil carbon and nitrogen dynamics.Through the analysis of the change of soil indicators,it can be concluded that the soil protein related to glomalin can promote the material circulation in the soil,meanwhile,it can stabilize the content of organic carbon and nitrogen in the soil and promote the ecological cycle.In the ecosystem,soil enzymes not only participate in the material cycle but also play an important role in the energy conversion process.Soil carbon and nitrogen are very important in relation to soil enzymes and bursin-related soil proteins.In this paper,the soils of the vegetation communities of Puccinellia tenuiflora,Puccinellia tenuifolia,Betula platyphylla,Betula platyphylla and Bilberry in Daxinganling peatland were selected as research objects,and the changes of soil carbon and nitrogen content and soil enzyme activity in peatlands of Daxinganling were discussed.Changes in soil protein related to glomalin,and analysis of differences in soil carbon and nitrogen content and soil enzyme activity in different vegetation communities.The main findings are as follows:（1）As the plant diversity index decreases,soil total carbon,total nitrogen,N/P,and C/P tend to decrease.Correlation analysis showed that there was a significant positive correlation between plant species diversity index and total carbon in surface and deep soils.DOC,N/P,C/P and ammonia nitrogen content in surface soil had significant positive correlations with species richness and diversity index.Plant diversity and richness index with top soil（0-15 cm）（r=0.62,P<0.05;r=0.59,P<0.05）and bottom soil（15-30 cm）（r=0.69,P<0.05;r=0.57,P<0.05）There is a significant correlation between the dissolved organic carbon（DOC）content.Plant species diversity,richness,and soil microbial biomass carbon（MBC）are not related.There are significant differences in extractable NH4⁺-N in the plant diversity gradient.There was a significant positive correlation between plant species diversity and abundance and soil NH4+-N concentrations in the two soils.There was a significant positive correlation between NO₃^--N content in surface soil（0-15 cm）and species diversity and abundance（r=0.86,P<0.01;r=0.69,P<0.01）.The composition of above-ground vegetation is closely related to the carbon and nitrogen cycle of the underground ecosystem.Soil organic matter,DOC,N/P,C/P,and ammonia nitrogen are the key ecological factors that affect the composition and diversity of plant communities in peatlands.Significantly affect the ability of carbon cycling in soil.The carbon element contained in the soil is closely related to the composition of the vegetation community and is an important factor affecting its underground transformation process.（2）Plant species diversity and species richness are positively correlated with urease in topsoil（0-15 cm）,and acid phosphatase is only positively correlated with species diversity in topsoil（0-15 cm）.The species richness and species diversity in the bottom soil（15-30 cm）had a significant positive correlation with protease and acid phosphatase activities,while the species uniformity was found in both the top soil（0-15cm）and the bottom soil（15-30 cm）.No significant relationship with soil enzymes.Soilβ-glucosidase,invertase,urease,protease,and acid phosphatase are all closely related to the total carbon,total nitrogen,dissolved organic carbon,N/P,and water content in the surface and deep soils.It shows that in the ecosystem,soil enzymes not only participate in the material cycle but also play an important role in the energy conversion process.（3）The content of total glomamycin in the top layer（0-15 cm）and the bottom soil（15-30 cm）has a significant positive correlation with the plant species diversity index,and the content of easy-to-extract proteins in the top soil（0-15 cm）is also related to The plant species diversity index showed a significant positive correlation,and the species richness in the subsoil（15-30 cm）only had a positive correlation with the total glomalin protein.Globulin-associated soil protein is a protein secreted by arbuscular mycorrhizal fungi into the soil.Globulin-associated soil protein is a protein secreted into soil by arbuscular mycorrhizal fungi.Carbon and nitrogen are important components of this protein.Globulin-associated soil protein is an important link between vegetation and fungi,and its changes are closely related to soil carbon and nitrogen dynamics.