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[1]XU Qinxue,LI Chunmao,LI Zhaoxia,et al.Calculation and Analysis of C-value of Crop Cover and Management Factor in Purple Soil of Sloping Land in Three Gorges Reservoir Area[J].Research of Soil and Water Conservation,2019,26(02):175-179.

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Calculation and Analysis of C-value of Crop Cover and Management Factor in Purple Soil of Sloping Land in Three Gorges Reservoir Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 02 Page number: 175-179 Column: Public date: 2019-04-28

Title:: Calculation and Analysis of C-value of Crop Cover and Management Factor in Purple Soil of Sloping Land in Three Gorges Reservoir Area

Author(s):: XU Qinxue^1,2, LI Chunmao^1,3, LI Zhaoxia^2,4, CAI Chongfa^2,4; 1. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, Guangxi 541004, China;
2. Key Laboratory of Arable Land Conservation of Middle and Lower Research of Yangtze River, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China

Keywords:: purple soil; C value of crop cover and management factor; cropping patterns; rainfall erosion; farming period

CLC:: S152.7

DOI:: -

Abstract:: The effects of cropping system on soil loss (C values) were analyzed through calculating crop stage, rainfall erosivity, and SLR in the USLE model. The results reflected that the C values of 22 cropping systems changed from 0.16 to 0.65 in purple soil of the sloping crop land. The C values of different cropping system increased in the order: intercrop/rotation < rotation < monoculture. In the same cropping patterns, the distribution of growth period and rainfall erosion was the main reason for leading to the difference, and in the different cropping patterns, the combination of crop growth period and rainfall erosion distribution could be adjusted to make the product of soil erosion rate and crop EI smaller, indicating that the soil erosion was the least in the case of intercrop/rotation. Most of the results obtained by this calculation method were basically consistent with the results of the observation and other empirical formulas. The C value obtained by this method can be used to quantitatively evaluate the contrast of soil erosion between different cropping patterns and fallow practices. This study can provide a reference for crop configuration on purple soil sloping lands.

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