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合理施氮可显著增强短季棉盛花前根系活力，促使棉株稳健生长，还可增加单株叶片数，扩大群体叶面积指数，促进棉叶增厚，从而显著提高始絮前群体净光合生产率，增加干物质生产和结实器官干物质积累比例，协调营养与生殖生长。施氮处理Ｎ２的短季棉吐絮期生殖器官中干物质积累极显著地高于高氮处理Ｎ３和Ｎ４，分别提高了１４．２０％和３７．８０％，这可为多结铃，增铃重提供充足养分，同时还有利于提高纤维比强度，对其它纤维性状无显著不良影响
Rational application of nitrogen could significantly enhance the root activity of cotton before flowering in the short season and promote the stable growth of cotton plants, but also increase the number of leaves per plant, expand the leaf area index of the population and promote the thickening of the cotton leaf, thus significantly increasing the net photosynthetic rate and increasing Dry Matter Production and Solid Organ Dry Matter Accumulation, Coordinating Nutrition and Reproductive Growth. The dry matter accumulation of reproductive organs in the short-season cotton boll-opening stage of N2 treatment was significantly higher than that of high-nitrogen treatments of N3 and N4, increased by 14.20% and 37.80% respectively, which could be multi-boll and bolus Re-provide adequate nutrients, but also help to improve the fiber strength, no significant adverse effects on other fiber properties