Effects of Chinese milk vetch intercropping with rapeseed under straw mulching on soil microenvironment
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DOI:10.7606/j.issn.1000-7601.2019.04.26
Key Words: Chinese milk vetch  rape  straw mulching  soil hydrothermal factor  soil nutrient
Author NameAffiliation
ZHOU Quan Research Center on Ecological Sciences, Jiangxi Agricultural University / Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Nanchang Jiangxi 330045, China 
CHEN Jiao College of Agronomy and Biotechnology, Southwest University / Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education / Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China 
SHI Chao College of Agronomy and Biotechnology, Southwest University / Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education / Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China 
XING Yi College of Agronomy and Biotechnology, Southwest University / Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education / Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China 
MA Shu-min College of Agronomy and Biotechnology, Southwest University / Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education / Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China 
ZHANG Xiao-duan College of Agronomy and Biotechnology, Southwest University / Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education / Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China 
WANG Long-chang College of Agronomy and Biotechnology, Southwest University / Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education / Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China 
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Abstract:
      In order to explore the application of green manure on upland in southwestern China through plantingChinese milk vetch under straw mulching, we compared effects on soil microenvironment. The purpose was to provide a theoretical basis for the feasibility of planting Chinese milk vetch in rapeseed field. The soil hydrothermal factor and soil nutrient were examined. Results showed that straw mulching significantly improve the soil temperature of farmland at 10 cm, 0.11℃ in the whole growth stage. And intercropping can significantly improve the soil temperature of farmland at 10 cm in the seedling stage, more significantly with straw mulching. The effect of straw mulching on soil moisture and soil conductivity in 0~5 cm was small, but the soil moisture content of the soil was improved by 0.26 m3·m-3 in Chinese milk vetch monoculture and the soil moisture and soil conductivity were decreased by 0.24 m3·m-3 and 0.16 dS·m-1 inintercropping. Furthermore, the effects of different planting patterns on soil nutrients were mainly reflected in maize season. The comprehensive effect of soil nutrients in rape season and maize season by planting Chinese milk vetch was better than any other treatments. The nutrient comprehensive evaluation value(NCEV)was 1.101 in rape season and 1.214 in maize season with Chinese milk vetch monoculture and straw mulching treatment. In conclusion, the soil hydrothermal microenvironment was improved effectively by planting Chinese milk vetch under straw mulching, and the comprehensive effect of soil nutrient was preferably.
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