[1]YUE Yi,ZHANG Xiaoya,GAO Junqin,et al.Effect of Simulated Drying-Rewetting Cycles on Soil Respiration and Dissolved Organic Carbon and Nitrogen Stability in Zoige Alpine Wetlands[J].Research of Soil and Water Conservation,2020,27(01):81-87.
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Effect of Simulated Drying-Rewetting Cycles on Soil Respiration and Dissolved Organic Carbon and Nitrogen Stability in Zoige Alpine Wetlands
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
81-87
Column:
Public date:
2020-02-20
- Title:
- Effect of Simulated Drying-Rewetting Cycles on Soil Respiration and Dissolved Organic Carbon and Nitrogen Stability in Zoige Alpine Wetlands
- Keywords:
- drying-rewetting intensity; drying-rewetting frequency; Zoige alpine wetland; wetland soil; soil respiration
- CLC:
- S153
- DOI:
- -
- Abstract:
- With the global climate change, extreme droughts and heavy precipitation events occur frequently, thus soils are undergoing more complicated and frequent drying-rewetting cycles, which have an important effect on soil respiration. We conducted a 144-day incubation experiment with two intensities(low and high intensities), two frequencies(low and high frequencies)of drying-rewetting cycles and one constant soil moisture to study the effect of drying-wetting intensity and frequency on soil respiration, soil dissolved organic carbon, inorganic nitrogen and their stability in Zoige alpine wetlands. The results showed that the intensity of drying-wetting cycles had significant effect on soil respiration, dissolved organic carbon, ratio of dissolved organic carbon to inorganic nitrogen and their stabilities; high-intensity drying-rewetting cycles promoted soil respiration, while low-intensity drying-rewetting cycles was beneficial to increase of the content of dissolved organic carbon and the ratio of dissolved organic carbon to inorganic nitrogen; the content and the stability of ammonium nitrogen were significantly affected by the frequency and interaction of drying-rewetting intensity and frequency, while nitrate nitrogen was significantly affected by the intensity and interaction of drying-rewetting intensity and frequency; inorganic nitrogen and its stability were not affected by the drying-rewetting cycles. In conclusion, the intensity and frequency of drying-rewetting cycles had different effects on the soil respiration, dissolved organic carbon, inorganic nitrogen and their stabilities in Zoige alpine wetlands. These results are helpful to understand the carbon cycle process and mechanism of alpine wetlands under future climate change.
- References:
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Last Update:
2020-02-25