[1]Xiao Shengyang,Zhang Lanyue,Chen Jingzhong,et al.Stability of Soil Aggregates and Its Influencing Factors at Different Elevations in Fanjing Mountain[J].Research of Soil and Water Conservation,2024,31(03):160-168.[doi:10.13869/j.cnki.rswc.2024.03.015]
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Stability of Soil Aggregates and Its Influencing Factors at Different Elevations in Fanjing Mountain
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 03
Page number:
160-168
Column:
Public date:
2024-04-30
- Title:
- Stability of Soil Aggregates and Its Influencing Factors at Different Elevations in Fanjing Mountain
- CLC:
- S152.4
- DOI:
- 10.13869/j.cnki.rswc.2024.03.015
- Abstract:
- [Objective] The aim of this study is to elucidate the altitude distribution pattern and its impact mechanism of soil aggregate stability, which is imperative for evaluating the stability of ecological functional in mountain ecosystems. [Methods] Soil samples were collected in different soil depths under the elevation gradient of 900～2 100 m in Fanjing Mountain. The relationship between soil environmental factors and the stability of soil aggregates were discussed by means of wet-dry screening and redundancy analysis(RDA). [Results] The content of macroaggregates(>0.25 mm)constituted the largest proportion(86.78%)of aggregate sizes across all elevations in mountain forest ecosystem in 0—60 cm soil layer. In 0—20 cm soil layer, the altitude gradient was significantly different, and the middle altitude 1 500～1 800 m was significantly higher than 1 800～2 100 m(p<0.05). There was a significant correlation between the MWD, GMD, and D of soil aggregates and altitude. As altitude increased, the MWD and GMD of soil aggregates showed a single peak distribution pattern of first increasing and then decreasing, reaching a peak at 1 500～1 800 m at mid altitude. In the 0—20 cm soil layer, the MWD and GMD of 1 500～1 800 m were 5.03, 3.64 and 4.79, 3.52, respectively, significantly higher than 900～1 200 m and 1 800～2 100 m(p<0.05). Redundancy analysis(RDA)showed that the stability of soil aggregates along the altitude gradient was mainly affected by soil organic carbon and pH, and the explanations for the stability of soil aggregates were 76.3% and 1.3%, respectively. [Conclusion] In the forest ecosystem of Fanjing Mountain, the stability of soil aggregates varies significantly along the elevation gradient, and soil chemical properties are important factors affecting the stability of aggregates.
- References:
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Last Update:
2024-04-30