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Coupling Regulation of Root-Zone Soil Water and Fertilizer for Summer Maize with Drip Irrigation

文献类型： 外文期刊

作者： Ma, Changjian 1 ; Liu, Shenglin 1 ; Wang, Xuejun 1 ; Wang, Lu 2 ; Muhammad, Tahir 3 ; Xiao, Yang 4 ; Wang, Yue 1 ; Sun, Zeqiang 1 ; Li, Yunkai 4 ;

作者机构： 1.Shandong Acad Agr Sci, Jinan 250100, Peoples R China

2.Shandong Acad Agr Sci, Inst Modern Agr Yellow River Delta, Dongying 257091, Peoples R China

3.Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Peoples R China

4.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China

关键词： drip irrigation; fertigation frequency; small-flow rate; root zone; coupling body regulation; summer maize

期刊名称：WATER （ 影响因子：3.53； 五年影响因子：3.628 ）

ISSN：

年卷期： 2022 年 14 卷 22 期

页码：

收录情况： SCI

摘要： Water scarcity is the most significant constraint for grain production in the North China Plain (NCP). Water-saving irrigation technology is a valuable tool for addressing the NCP's water scarcity. Drip irrigation is considered as one of the most water-saving irrigation technologies. However, drip irrigation is not now commonly used in NCP field grain crops (particularly maize). Fertilizers are accurately administered to summer-maize root soil by recycling the drip-irrigation system of winter wheat. To increase the water and fertilizer-use efficiency of summer-maize fields, the coupling body of root-zone soil water and fertilizer for summer maize was thoroughly adjusted using a combination of emitter flow rate, irrigation quota, and fertilizer frequency. In this experiment, a split plot design with randomized blocks was employed. The primary plot was emitter flow rate (0.8 and 2.7 L/h), the subplot was irrigation water quota (120 and 150 m(3)/hm(2), 1 hm(2) = 10,000 m(2)), and the final plot was fertigation frequency (7, 14, and 28 days). The grain yield, water-use efficiency and fertilizer-use efficiency of summer maize were measured in this study. The results showed that grain yield and water-use efficiency (WUE) of the small-flow drip-irrigation treatment (emitter flow rate < 1 L/h) were significantly higher than the large-flow treatment (emitter flow rate > 1 L/h); the rates of grain yield increase were 8.2% and 13.3% and WUE were 3.5% and 8.0%, respectively. A higher irrigation quota can increase the yield of summer maize. The maximum yield and WUE were observed at the fertigation frequency of 7 days under small-flow drip-irrigation conditions. All comparisons and analyses showed that small-flow drip irrigation combined with high fertigation frequency could obtain higher yield and WUE in the NCP. This study proposes a new way to improve water and fertilizer utilization efficiency to achieve the goal of "increasing grain yield by fertilizing" and "adjusting the quality by fertilizing", from the perspective of winter wheat-summer maize no-tillage annual rotation planting.

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