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Long-term green manuring to substitute partial chemical fertilizer simultaneously improving crop productivity and soil quality in a double-rice cropping system

文献类型： 外文期刊

作者： Zhang, Jianglin 1 ; Nie, Jun 1 ; Cao, Weidong 3 ; Gao, Yajie 1 ; Lu, Yanhong 1 ; Liao, Yulin 1 ;

作者机构： 1.Hunan Acad Agr Sci, Hunan Soil & Fertilizer Inst, Changsha 410125, Peoples R China

2.Minist Agr China, Sci observing & Expt Stn Arable Land Conservat Hun, Changsha 410125, Peoples R China

3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

4.Yuanda Rd 730, Changsha 410125, Peoples R China

关键词： Green manure; Soil quality; Yield sustainability; Apparent nutrient balance; Double-rice cropping system

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：5.722； 五年影响因子：6.384 ）

ISSN： 1161-0301

年卷期： 2023 年 142 卷

页码：

收录情况： SCI

摘要： Rotation with Chinese milk vetch (MV) as winter green manure in double-rice cropping system is an efficient approach to substitute chemical fertilizer (CF). However, the optimal substitution rate of MV for CF and its long-term effects on crop productivity and soil quality remain unknown. We conducted a 13-year field experiment with different substitution rates of MV for CF (22.5 t ha(-1) fresh MV incorporation with 100%, 80%, 60%, and 40% of the recommended nitrogen (N) and potassium (K) supply, represented by MV+F-100, MV+F-80, MV+F-60 and MV+F-40, respectively) to investigate its long-term effects on yield sustainability and soil quality in double rice cropping system. Compared with the sole application of CF, the MV+F-100 and MV+F-80 treatments signifi-cantly increased the early rice yields by 15.6% and 11.3% and the late rice yields by 9.3% and 6.3%, respectively. Utilization of MV to substitute 0-40% of the N and K in early rice season and 0-20% of the N and K in late rice season significantly increased the soil quality index (SQI). However, further increasing the substitution rate decreased the sustainability yield index (SYI) and SQI. The soil available phosphorus had a stronger effect on the early and late rice grain yield than the other soil physicochemical properties. Meanwhile, rice grain yields significantly increased with increasing SQI, and the apparent N, P and K balances positively affects SQI. The SYIs of early and late rice crops linearly increased with increasing SQIs, while the coefficient of variance in grain yield (CVy) decreased with increasing SQI. Consequently, long-term utilization of MV to substitute 0-40% of the N and K in early rice season and 0-20% of the N and K in late rice season can simultaneously improves yield sus-tainability and soil quality.

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