Balanced N and C input recommendations for rain-fed maize production in northern China based on N balances and grain yields

文献类型： 外文期刊

第一作者： Wang, Xiaobin

作者： Wang, Xiaobin;Cai, Dianxiong;Zhao, Quansheng;Xie, Xiaohong;Cai, Dianxiong;Hoogmoed, Willem B.;Oenema, Oene

作者机构：

关键词： carbon;dryland;maize;nitrogen;rain-fed farming

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：3.638； 五年影响因子：3.802 ）

ISSN： 0022-5142

年卷期： 2018 年 98 卷 3 期

页码：

收录情况： SCI

摘要： BACKGROUNDThis study aimed to assess longer-term (1993-2009) effects of combined applications of fertiliser, maize stover, and cattle manure on maize yields, partial nitrogen (N) and carbon (C) balances, and water and N-use efficiencies, to guide N and C input recommendations for rain-fed maize production in northern China. RESULTSThe field trial, with three factors at five levels and 12 treatments, was conducted at Shouyang Dryland-Farming Experimental Station, Shanxi, China. Data analysis revealed higher N balances but lower C balances significantly occurred in a dry year than in a wet year. Positive N balances related to higher N inputs resulted in higher soil available N, even downward to deep layers with increasing N inputs, while positive C balances due to higher C inputs could be benefit to increase soil organic C. Based on partial N balances and grain yields, N and C inputs at ranges of 100kg N ha(-1) and 1.9-2.9Mg C ha(-1) could be recommended for target yields of 6.7-7.2Mg ha(-1) in rain-fed maize production. CONCLUSIONThe study suggests that N balances close to neutral be given priority to improving N-use efficiency, and more positive C balances also be important for sustaining target yields and soil fertility levels. (c) 2017 Society of Chemical Industry

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