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[1]ZHU Qing,CHEN Zheng-gang,LI Jian,et al.Comparative Study on Soil and Water Conservation Effect of the Three Cropping Patterns on Slope Land in Guizhou Province[J].Research of Soil and Water Conservation,2012,19(04):21-25.

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Comparative Study on Soil and Water Conservation Effect of the Three Cropping Patterns on Slope Land in Guizhou Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 04 Page number: 21-25 Column: Public date: 2012-08-20

Title:: Comparative Study on Soil and Water Conservation Effect of the Three Cropping Patterns on Slope Land in Guizhou Province

Author(s):: ZHU Qing¹, CHEN Zheng-gang¹, LI Jian¹, XIONG Yan-hua²; 1. Soil and Fertilizer Institute of Guizhou Province, Guiyang 550006, China;
2. No.7 Middle School of Guiyang, Guiyang 550001, China

Keywords:: slope field; alfalfa-corn intercropping; soil and water conservation

CLC:: S157.2

DOI:: -

Abstract:: Surface cover degree, monthly variation of topsoil water content, loss of soil and nutrient in alfalfa-corn intercropping, strip rotation cropping and corn monoculture were studied. Then soil and water conservation effect of these planting modes were compared. Results showed that surface cover degree was high during all the rainy season in both alfalfa-corn intercropping and strip rotation cropping mode, with slope field covered by vegetation all the year round. Roots of alfalfa grew well, which not only improved the root biomass in 0-20 cm layer, enhanced the capacity of soil infiltration, protected biodiversity, but also reduced 39.3% and 59.3% of surface runoff and soil erosion, respectively. Strip rotation cropping could also reduce 10.4% and 21.3% of surface runoff and soil erosion. Both alfalfa-corn intercropping and strip rotation cropping increased soil moisture in rainy season and before rainy season, while reduced loss of organic matter (caused by soil erosion) by 29.9%～52.4%, 26.7%～54.9% for total N, 27.3%～70.9% for total K, 21.4%～58.9% for slow available K, increased corn production by 33.0%～35.9%. Moreover, The yield was 12492 kg/hm² in strip rotation cropping which was 2.7 times higher than conventional mode. The yield was 13664 kg/hm² in alfalfa-corn intercropping, which was 4.1 times higher than conventional mode.

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