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

作     者：HAN Yu-ling GUO Dong MA Wei GE Jun-zhu LI Xiang-ling Ali Noor MEHMOOD ZHAO Ming ZHou Bao-yuan HAN Yu-ling;GUO Dong;MA Wei;GE Jun-zhu;LI Xiang-ling;Ali Noor MEHMOOD;ZHAO Ming;ZHOU Bao-yuan

作者机构：Institute of Crop SciencesChinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and EcologyMinistry of Agriculture and Rural AffairsBeijing 100081P.R.China College of AgricultureNortheast Agricultural UniversityHarbin 150030P.R.China College of Agronomy&Resource and EnvironmentTianjin Agricultural UniversityTianjin 300384P.R.China College of Agronomy and BiotechnologyHebei Normal University of Science&TechnologyQinhuangdao 066004P.R.China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2022年第21卷第9期

页      面：2559-2576页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：funded by the National Natural Science Foundation of China(32071957) the Key National Research and Development Program of China(2018YFD0300504) the Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences(2060302-2) the China Agriculture Research System of MOF and MARA(CARS-02) 

主　　题：maize strip deep rotary tillage controlled-release urea nitrogen accumulation grain yield 

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(Nmin) 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 Nmin 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 the1 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).