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[1]FU Yun,JIA Ya-nan,LAN Jia-cheng.Analysis of Soil Anti-erodibility of Slope Farmland in Karst Mountain Area Based on Tillage Erosion[J].Research of Soil and Water Conservation,2011,18(05):5-9.

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Analysis of Soil Anti-erodibility of Slope Farmland in Karst Mountain Area Based on Tillage Erosion

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 05 Page number: 5-9 Column: Public date: 2011-10-20

Title:: Analysis of Soil Anti-erodibility of Slope Farmland in Karst Mountain Area Based on Tillage Erosion

Author(s):: FU Yun¹, JIA Ya-nan^1,2, LAN Jia-cheng¹; 1. School of Geographical Science, Southwest University, Chongqing 400715, China;
2. Key Laboratory of Eco-environments and Bio-resources in Three Gorges Region, Chongqing 400715, China

Keywords:: karst area; tillage erosion; soil anti-erodibility; principal component analysis

CLC:: S157.1;F301.24

DOI:: -

Abstract:: Research on the surface soil anti-erodibility of different land use types by means of principal component analysis in Zhongliang Mountain of Chongqing was carried out based on the data of micro-aggregates, water stable aggregate and organic matter content as indicators. The results showed that: >0.25 mm, >0.5 mm water stable aggregate and their destruction rate, average diameter and organic matter content are the four best indicators to evaluate the soil anti-erodibility; soil anti-erodibility under different land use types are shrub land>grassland >bamboo>slope farmland, which convinces that farmland set-aside can improve the soil anti-erodibility. It can achieve opposite conclusion when use micro-aggregates categories as indicator and water stable aggregates and organic matter categories as indicator respectively, but the latter are consistent with the result of principal component analysis, which relate with a special process of soil formation and the fragile ecological environment in this area. Tillage erosion can conduct to soil property redistribution on the surface of slope, and then affect the soil anti-erodibility. The soil anti-erodibility in different parts of slope farmland is in the order of the upper>the lower>the bottom>the top, which is consistent with the distribution of water stable aggregate content, it is showed that water stable aggregate category indicators better reflect the properties of soil anti-erodibility.

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