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Improvements in Grain Yield and Nitrogen Use Efficiency of Summer Maize by Optimizing Tillage Practice and Nitrogen Application Rate

文献类型： 外文期刊

作者： Zhai, Lichao 2 ; Xu, Ping 1 ; Zhang, Zhengbin 1 ; Wei, Benhui 3 ; Jia, Xiuling 2 ; Zhang, Lihua 2 ;

作者机构： 1.Chinese Acad Sci, Key Lab Agr Water Resources, Ctr Agr Resources Res, Inst Genet & Dev Biol,Luancheng Agroecosyst Expt, Shijiazhuang 050021, Hebei, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Sci Observing & Expt Stn Crop Cultivat North Chin, Minist Agr, Shijiazhuang 050035, Hebei, Peoples R China

3.Guangxi Acad Agr Sci, Cash Crops Res Inst, Nanning 530007, Guangxi Provinc, Peoples R China

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2019 年 111 卷 2 期

页码：

收录情况： SCI

摘要： Long periods of single tillage practice combined with excessive nitrogen (N) application are major factors restricting high yield and high efficiency production in the North China Plain. Field experiments were conducted by using a split-plot design. Main plots included three different tillage practices: no tillage (T1), subsoiling tillage (T2), and deep vertical rotary tillage (T3). Subplots consisted of four different N application rates (N300: 300 kg ha(-1); N225: 225 kg ha(-1); N150: 150 kg ha(-1); N0: 0 kg ha(-1)) with a plant density of 90,000 plants ha(-1). Under the same N rate, T3 increased grain yield by 19.1 and 13.4% compared with that of T1 and T2. Under the same tillage practice, grain yield decreased with the reduced N rate, but the difference between N225 and N300 was not significant in most cases. Nitrogen agronomic efficiency (AE(N)), N recovery efficiency (REN), and partial factor productivity of applied N (PFPN) of T3 and T2 were higher than that of T1. Compared with T1, T2 increased AE(N), REN, and PFPN by 6.5, 139.2, 6.1%, respectively, and T3 increased AE(N), REN, and PFPN by 36.2, 82.1, and 20.1%, respectively. Levels of AE(N), REN, and PFPN reduced with increasing N application rate in 2016, but N225 has the highest AE(N) and REN in 2017. The T x N interaction showed that the grain yield of T3-N225 was the highest; however, T3-N150 (2016) and T2-N225 (2017) had the highest AE(N) and REN. In light of the economic benefit, the optimal management strategy was 225 kg N ha(-1) paired with deep vertical rotary tillage.

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