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Effects of straw application on nitrate leaching in fields in the Yellow River irrigation zone of Ningxia, China

文献类型： 外文期刊

作者： Yang, Shiqi 1 ; Wang, Yongsheng 3 ; Liu, Ruliang 4 ; Li, Quanxin 5 ; Yang, Zhengli 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

2.Minist Agr, Key Lab Agroenvironm & Climate Change, Beijing 100081, Peoples R China

3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Reg Sustainable Dev Modeling, Beijing 100101, Peoples R China

4.Ningxia Acad Agroforestry Sci, Inst Agr Resources & Environm, Yinchuan 750002, Peoples R China

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

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2018 年 8 卷

页码：

收录情况： SCI

摘要： A five-year field experiment was conducted to investigate the effects of straw application on nitrate leaching loss. Treatments included soil that was not treated (control), soil treated with straw at a low rate (4,500 kg ha(-2), T1) and soil treated with straw at a high rate (9,000 kg ha(-2), T2). Nitrate-nitrogen leaching in the 10, 20, 30, 60, and 90 cm soil layers was measured using the resin-core method. The results indicated that straw application could reduce soil nitrate leaching losses in the 0-30 cm layer. In this layer, the nitrate leaching values for T1 (13.76 kg ha(-2)) and T2 (13.74 kg ha(-2)) were both significantly lower than those of the control (15.76 kg ha(-2)) (P < 0.05); the soil nitrate leaching losses decreased by 12.71% and 12.84% for those two treatments, respectively. However, no significant differences in losses were observed (P > 0.05) between T1 and T2. The effects of straw application were apparent only in the ploughing layer (30 cm-depth soil layer). In the deeper layers (60 and 90 cm), no significant differences were observed between the treatments and the control, and the same results were observed in the topsoil layers (10 and 20 cm).

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