Balanced N And C Input R.ecommendations For Rain-Fed Maize P roduction In Northern China Based On N Balances And Grain Yields
文献类型: 外文期刊
作者: Wang, XB; Cai, DX; Zhao, QS; Xie, XH; Hoogmoed, WB; Oenema, O
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
ISSN: 0022-5142
年卷期: 2018 年 98 卷 3 期
页码:
收录情况: JCR(2021版)
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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