[1]PENG Peiyuan,WU Xiaoni,LI Ziguang,et al.Characteristics of Distribution of Inorganic Phosphorus Fractions in Soils of Different Land Use Patterns in the Source Area of Dianchi Watershed[J].Research of Soil and Water Conservation,2021,28(06):58-64.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 06
Page number:
58-64
Column:
Public date:
2021-10-10
- Title:
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Characteristics of Distribution of Inorganic Phosphorus Fractions in Soils of Different Land Use Patterns in the Source Area of Dianchi Watershed
- Author(s):
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PENG Peiyuan1,WU Xiaoni2,1,LI Ziguang3,ZHAO Luoqi1,FU Denggao1,DUAN Changqun1
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(1.Yunnan Provincial Key Laboratory of Plateau and Mountain Ecology and Degraded Environment Restoration,School of Ecology and Environmental Science,Yunnan University,Kunming 650091,China; 2.School of Agriculture and Life Sciences,Kunming University,Kunming,Yunnan 650214,China; 3.Haikou Forest Farm,Kunming 650114,China)
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- Keywords:
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land use; inorganic phosphorus fraction; phosphorus supply capacity; phosphorus loss
- CLC:
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S153.6
- DOI:
-
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- Abstract:
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To understand the composition and distribution characteristics of inorganic phosphorus under different land use patterns in the source area of the eutrophic lake basin,the characteristics of distribution of soil inorganic phosphorus fractions were analyzed by selecting 6 different land use patterns(Pinus yunnanensis forest,barren grassland,phosphorus-rich farmland,greenhouse farmland,greenhouse ditch,and open farmland)in Chaihe Watershed in the south of Dianchi Lake. The results showed that the inorganic phosphorus content was 0.96~3.23 g/kg,accounting for 45.31%~76.41% of total phosphorus content; Fe-P and Ca-P were the main inorganic phosphorus fractions in the P. yunnanensis forest,barren grassland,and phosphorus-rich farmland,which accounted for 64.24%~68.24% of the inorganic phosphorus content,respectively; Ca-P and O-P were the main inorganic phosphorus fractions under the greenhouse farmland,greenhouse ditches and open farmland in flat ground,which accounted for 83.49%~89.70% of the inorganic phosphorus content. Correlation analysis showed that soil available phosphorus was significantly positively correlated with Ca-P and O-P,while the organic phosphorus and Al-P,Fe-P,O-P and Ca-P showed the significantly positive correlations. It could be seen that the mountain areas(P. yunnanensis forest,barren grassland)in the watershed had better phosphorus supply potential,which was conducive to improving their ecological restoration efficiency in order to achieve effective control of nonpoint source pollution,and phosphorus-rich farmland was a key area for the prevention and control of non-point source pollution in the watershed due to its high phosphorus content and land cover characteristics.