The effects of nitrogen fertilizer on growth and development of cotton under non-sufficient irrigation under film condition were studied ,and the effects of nitrogen fertilizer on yield components of cotton under different irrigation were studied to provide basis for developing water-saving ,high-yield and high-efficiency agriculture in arid area .The ef-fects of irrigation and nitrogen application on cotton agronomic traits and yield formation were studied under the condition of southern Xinjiang .The results showed that 2800 m3·hm-2 had the highest growth rate of bud growth rate ,boll growth rate and yield increment ,compared with the treatments of 3800 m3·hm-2 of irrigation rate .Compared with the different nitrogen application rates ,the general trend was N2>N3>N1>N0 .The effect of irrigation and nitrogen application on cotton dry matter formation and its allocation was significant .When the irrigation amount was 2800 m3·hm-2 and the ir-rigation volume was 3800 m3·hm-2 ,and the cotton yield could be more utilized .Combine irrigation with irrigation con-trollable characteristics ,to develop the appropriate irrigation and fertilization system ,to achieve high water-saving cotton field is of great significance .%研究膜下非充分灌溉条件下施用氮肥对棉花生长发育的调节效应,揭示不同灌溉量下施用氮肥对棉花产量构成因子的效应,为干旱区发展节水高产高效农业提供依据.在南疆生态条件下,选用新陆中54为试验材料,研究灌溉量及氮肥对棉花的农艺性状及产量形成的影响.与灌溉量为3800 m3·hm-2处理相比,2800 m3·hm-2生育进程提前,现蕾增加率、成铃增加率及产量增加率均最高;与不同施氮水平(4个施氮水平0、150、300、450 kg·hm-2,分别用N0、N1、N2、N3表示)相比,总体趋势表现为N2>N3>N1>N0.灌溉量及氮肥对棉花干物质形成及其分配有显著的调节效应,灌溉量为2800 m3·hm-2处理相比灌溉量为3800 m3·hm-2的处理,更有利提高棉花增产率.结合灌溉棉田灌溉量可控的特点,制定相应的灌溉施肥制度,对实现棉田节水高产高效有重大意义.
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