[1]WANG Zhenfen.Characteristics of Soil Nutrients and Enzyme Activity Under Different Types of Land Use in Wetland of Sanjiang Plain[J].Research of Soil and Water Conservation,2019,26(02):43-48.
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Characteristics of Soil Nutrients and Enzyme Activity Under Different Types of Land Use in Wetland of Sanjiang Plain
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 02
Page number:
43-48
Column:
Public date:
2019-04-28
- Title:
- Characteristics of Soil Nutrients and Enzyme Activity Under Different Types of Land Use in Wetland of Sanjiang Plain
- Keywords:
- Sanjiang Plain; wetland; soil nutrients; soil enzymes
- CLC:
- S154
- DOI:
- -
- Abstract:
- The wetlands in the Sanjiang Ecology Station of Chinese Academy of Sciences were selected as the study sites, the characteristics of soil enzyme activities and nutrients under different types of land use, including wetland ecosystem, dryland ecosystem, conversion of dryland to wetland, conversion of dryland to forestland, were investigated. The results showed that there was a great significance difference in soil enzyme activities (invertase, urease, phosphatase and catalase) and soil nutrients. Soil organic carbon, total nitrogen, total potassium, available phosphorus, alkali-hydrolyzed nitrogen, microbial biomass carbon and nitrogen showed the same change trend among these land use types, which decreased in the order: wetland ecosystem > conversion from dryland to wetland > conversion from dryland to forestland > dryland ecosystem. When the reclaimed dryland was recovered to wetland, soil nutrients gradually decreased, while there was no significantly difference in total phosphorus (p>0.05). Compare to wetland ecosystem, invertase, urease, phosphatase, and catalase decreased by 32.69%, 36.71%, 50.00% and 44.28%, respectively. However, after the dryland ecosystem was converted to wetland ecosystem, soil enzyme activities increased, and invertase, urease, phosphatase, and catalase increased by 26.68%, 31.51%, 48.19% and 43.84%, respectively, suggesting that there were two different biological processes, one was the microbial degradation process after the dryland ecosystem was converted to wetland ecosystem, the other was the microbial accumulation process after the wetland ecosystem was converted to dryland ecosystem. Correlation analysis showed that soil organic carbon, soil total nitrogen and soil microbial biomass carbon had the negative correlation with soil enzyme activities. Principal component analysis showed that soil organic carbon, soil total nitrogen and soil microbial biomass carbon were the main driving factors on soil enzyme activities in wetlands of Sanjiang Plain.
- References:
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1900-01-01