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Long-term no-tillage enhanced maize yield and potassium use efficiency under spring drought year

文献类型： 外文期刊

作者： Dong, Lina 1 ; Han, Xiangfei 1 ; Zheng, Jinyu 2 ; Liu, Xiaodan 2 ; Liu, Zhiming 2 ; Luo, Yang 2 ; Shao, Xiwen 1 ; Wang, Yongjun 1 ; Wang, Lichun 1 ;

作者机构： 1.Jilin Agr Univ, Coll Agron, Changchun 130118, Jilin, Peoples R China

2.Jilin Acad Agr Sci, Inst Agr Resource & Environm, State Engn Lab Maize, Changchun 130333, Jilin, Peoples R China

关键词： Dense planting; no-tillage; potassium efficiency; spring drought; yield

期刊名称：CHILEAN JOURNAL OF AGRICULTURAL RESEARCH （ 影响因子：1.917； 五年影响因子：1.99 ）

ISSN： 0718-5839

年卷期： 2022 年 82 卷 4 期

页码：

收录情况： SCI

摘要： Tillage is an important management tool for tackling and promoting water conservation and improving crop yield. As one of the important nutrients in plant growth, K is involved in important processes such as osmoregulation, photosynthesis and metabolite transport, and plays a particularly critical role in improving crop yield and quality. In the long-term positioning platform of the tillage method, a 2-yr field experiment was conducted in 2019-2020 in maize (Zea mays L.) Three tillage methods: conventional tillage (CT), subsoil tillage (ST), and no-tillage (NT) and two planting densities 6x104 (D1) and 9x104 plants ha-1 (D2) were set up in the experiment. The results showed that yield and K translocation efficiency (KTE) were significantly higher in NT than in CT at D1 (by 4.7% and 12.2%) and D2 (by 14.0% and 13.9%), respectively. At maturity stage in 2019, population DM accumulation after silking (DMA) was significantly higher in NT (by 11.0% and 16.9%) than in CT at D1 and D2. Correlation analysis revealed that yield was significantly positive correlated with ears (r = 0.57***) and DMA (r = 0.64***). Potassium translocation and K harvest index were positively correlated with KTE. Under spring drought year, the long-term no-tillage had a significant yield increase, mainly through the increase in 1000-kernel weight. The increase in K efficiency was mainly through the influence of DM accumulation and distribution, and K accumulation in grain.

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