The influence of water and nitrogen coupling on cotton yield and water and nitrogen utilization efficiency

doi:10.6048/j.issn.1001-4330.2025.08.009

Abstract

Abstract: 【Objective】To study the effect of water nitrogen coupling on cotton yield and water nitrogen utilization efficiency under membrane drip irrigation in Alar, Xinjiang.【Methods】Through the field test, Xinluzhon No.46 was taken as the test material and treated the water and nitrogen. Five samples were treated with pure nitrogen:（N_PK：200 kg/hm² , N₁：300 kg/hm²，N₂：400 kg/hm²，N₃：500 kg/hm²，N₄：600 kg/hm²）, three irrigation treatments were set: 2 100m³/hm² （W₁）、2 800 m³/hm² （W₂）、3 500 m³/hm² （W₃）. The effects of different water and fertilizer treatment on plant height, stem thickness, leaf area index（LAI）, dry matter accumulation, yield and water and nitrogen utilization efficiency were studied. 【Results】With the increase of irrigation amount and nitrogen application, the plant height and LAI gradually increased, and the SPAD value decreased, while the stem thickness of cotton increased first and then decreased. The cotton yield and utilization efficiency of irrigation water under medium and high nitrogen treatment N₂ and N₃ and under medium irrigation treatment W₂ reached the maximum value.【Conclusion】In the cotton-growing area of Alar, Xinjiang, the combination of 2 800 m³/hm² and nitrogen application of 500 kg/hm² can be used as the optimal water nitrogen combination.

Key words: water-nitrogen coupling; cotton yield; water-nitrogen utilization efficiency; irrigation water use efficiency; partial productivity of nitrogen fertilizer

摘要： 【目的】研究水氮耦合对新疆阿拉尔市膜下滴灌棉花产量和水氮利用效率的影响。【方法】通过大田试验，以新陆中46号为试验材料进行水氮2因素处理。设置5个施纯氮处理：（N_PK：200 kg/hm²，N₁：300 kg/hm²，N₂：400 kg/hm²，N₃：500 kg/hm²，N₄：600 kg/hm²），3 个灌溉量处理：2 100 m³/hm²（W₁）、2 800 m³/hm²（W₂）、3 500 m³/hm²（W₃），研究棉花生育期内不同水肥处理对株高、茎粗、叶面积指数（LAI）、干物质积累、产量及水氮利用效率的影响。【结果】随着灌水量和施氮量的增加，棉花株高、LAI呈逐渐上升趋势，叶绿素相对含量（SPAD）呈降低趋势，而棉花茎粗呈先增加后降低趋势。中高施氮N₂、N₃处理和中灌溉W₂处理下棉花产量及灌溉水利用效率达到最大值。【结论】在新疆阿拉尔市棉花种植区，灌水量2 800 m³/hm²、施氮量500 kg/hm²组合可作为最优水氮组合。

关键词: 水氮耦合, 棉花产量, 水氮利用效率, 灌溉水利用效率, 氮肥偏生产力

CLC Number:

MA Mengqian, YAN An, ZHAO Yuhang, XIAO Shuting, LI Jingyan, SUN Zhe. The influence of water and nitrogen coupling on cotton yield and water and nitrogen utilization efficiency[J]. Xinjiang Agricultural Sciences, 2025, 62(8): 1907-1915.

马梦倩, 颜安, 赵宇航, 肖淑婷, 李靖言, 孙哲. 水氮耦合对棉花产量及水氮利用效率的影响[J]. 新疆农业科学, 2025, 62(8): 1907-1915.

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