Strip deep rotary tillage combined with controlled-release urea improves the grain yield and nitrogen use efficiency of maize in the North China Plain

文献类型： 外文期刊

第一作者： Han Yu-ling

作者： Han Yu-ling;Guo Dong;Ma Wei;Mehmood, Ali Noor;Zhao Ming;Zhou Bao-yuan;Guo Dong;Ge Jun-zhu;Li Xiang-ling

作者机构：

关键词： maize; strip deep rotary tillage; controlled-release urea; nitrogen accumulation; grain yield

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.384； 五年影响因子：4.021 ）

ISSN： 2095-3119

年卷期： 2022 年 21 卷 9 期

页码：

收录情况： SCI

摘要： Inappropriate tillage practices and nitrogen (N) management have become seriously limitations for maize (Zea mays L.) yield and N use efficiency (NUE) in the North China Plain (NCP). In the current study, we examined the effects of strip deep rotary tillage (ST) combined with controlled-release (CR) urea on maize yield and NUE, and determined the physiological factors involved in yield formation and N accumulation during a 2-year field experiment. Compared with conventional rotary tillage (RT) and no-tillage (NT), ST increased the soil water content and soil mineral N content (N-min) in the 20-40 cm soil layer due to reduction by 10.5 and 13.7% in the soil bulk density in the 0-40 cm soil layer, respectively. Compared with the values obtained by common urea (CU) fertilization, CR increased the N-min in the 0-40 cm soil layers by 12.4 and 10.3% at the silking and maturity stages, respectively. As a result, root length and total N accumulation were enhanced under ST and CR urea, which promoted greater leaf area and dry matter (particularly at post-silking), eventually increasing the 1 000-kernel weight of maize. Thus, ST increased the maize yield by 8.3 and 11.0% compared with RT and NT, respectively, whereas CR urea increased maize yield by 8.9% above the values obtained under CU. Because of greater grain yield and N accumulation, ST combined with CR urea improved the NUE substantially. These results show that ST coupled with CR urea is an effective practice to further increase maize yield and NUE by improving soil properties and N supply, so it should be considered for sustainable maize production in the NCP (and other similar areas worldwide).

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