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[1]LI Xiaohong.Profile Distribution Characteristics of Soil Nutrients and Enzymes in the Wetland of Poyang Lake[J].Research of Soil and Water Conservation,2019,26(01):69-75,81.

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Profile Distribution Characteristics of Soil Nutrients and Enzymes in the Wetland of Poyang Lake

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 01 Page number: 69-75,81 Column: Public date: 2019-02-28

Title:: Profile Distribution Characteristics of Soil Nutrients and Enzymes in the Wetland of Poyang Lake

Author(s):: LI Xiaohong; Institute of Environmental Engineering, Qingdao Technological University, Qingdao, Shandong 266033, China

Keywords:: Poyang Lake; wetland; soil nutrients; soil enzymes

CLC:: S154.2;S156.047

DOI:: -

Abstract:: In order to study the profile distribution characteristics of soil nutrients and enzymes in the wetland of Poyang Lake, four plant communities were selected as the research sites. The depth of soil profile was 0-80 cm, which was divided into four layers (0-20 cm, 20-40 cm, 40-60 cm, 60-80 cm). The profile distributions of soil enzyme activities (Bglu, NAG, Bxyl, Phos, Phox and Pero), microbial biomass and soil nutrients were determined. The results showed that soil organic carbon (SOC), soil total nitrogen (STN)、soil total potassium (STK), soil alkaline hydrolytic nitrogen (SAN), soil available phosphorus (SAP) and soil available potassium (SAK) decreased gradually as the soil depth increased, and the soil nutrients in surface soil (0-20 cm) were significantly higher than those in deep soil, while there was no significant difference in soil total phosphorus (STP) of different layers; the average of soil nutrients decreased in the order:submerged plant area > wetland plantsbog plant area > emerged plant area > lake shoal; MBC, SMBN and SMBP decreased gradually as the soil depth increased, and the soil, microbial biomass in surface soil (0-20 cm) was significantly higher than that in deep soil, while there was no significant difference in SMBP of different layers; the average of soil microbial biomass decreased in the sequence:submerged plant area > wetland plantsbog plant area > emerged plant area > lake shoal. There is the same change trend between soil nutrients and enzymes. Correlation analysis showed that there were higher correlation coefficients between soil microbial biomass and soil enzymes, indicating that soil microbial biomass was the main factor affecting soil enzymes. Double factor analysis indicated that the plant and soil depth had the significant effect on soil microbial biomass and soil enzymes, and had no effect on STP, SAP and SMBP (p > 0.05). In total, there is a synergistic effect between soil microbial biomass and soil enzymes in the wetland of Poyang Lake.

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