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Higher economic benefits and changes in soil fertility due to intensifying winter crop rotation in double-rice cropping systems

文献类型： 外文期刊

作者： Huang, Qiaoyi 1 ; Tang, Shuanhu 1 ; Fan, Xiaolin 2 ; Huang, Jianfeng 1 ; Yi, Qiong 1 ; Zhang, Mu 1 ; Pang, Yuwan 1 ; Huan 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou 510640, Peoples R China

2.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China

3.Minist Agr, Key Lab Plant Nutr & Fertiliser South Reg, Guangzhou 510640, Peoples R China

4.Guangdong Key Lab Nutrient Cycling & Farmland Con, Guangzhou 510640, Peoples R China

关键词： Crop rotation; Soil bulk density; Soil organic carbon; Soil mineral nutrient content; Soil microorganisms; Enzyme activity

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）

ISSN： 0929-1393

年卷期： 2021 年 157 卷

页码：

收录情况： SCI

摘要： Farmers are increasingly planting vegetables during the winter fallow period in the double-rice growing area of Guangdong Province, southern China. The intensified winter crop rotation system (rice-rice-vegetable, RRV) may improve the annual planting benefit and change the soil fertility. To address this, yields, biomass, and profitability of each crop in the RRV, relative to the traditional rice-rice-fallow system (RRF), were compared, and the dynamics of physical, chemical and biological properties of soil at different crop stages were determined in this paper. The annual crop yield, biomass and economic return of RRV were significantly higher than those of RRF due to the inclusion of winter vegetables (green beans) in the cropping system. The contribution of green beans to the total revenue per year for RRV was as high as 73%. Filling winter fallow with green beans had no influence on the yield of early and late rice. Soil NO3--N, available P, exchangeable K, exchangeable Fe, exchangeable Cu and acid phosphatase activity at the winter stage were significantly higher in RRV than in RRF, whereas soil pH, soil organic carbon (SOC), dissolved organic carbon (DOC), exchangeable Ca, exchangeable Mg, catalase activity, dehydrogenase activity and invertase activity at the winter stage were lower. The soil NO3--N, exchangeable Fe, exchangeable Cu, and acid phosphatase activity during the early rice stage also tended to be higher in the RRV system. The annual dynamics of soil physical, chemical and biological properties were proven to be greater in the RRV system than in the RRF system. The findings of our study contribute to the under-standing of dynamic changes in physical, chemical and biological properties of soil across different crop stages due to intensified green bean planting during the winter fallow period in a double-rice cropping system, which will be useful for the sustainable development of RRV.

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