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研究了北疆高产棉花群体（１８００ｋｇ／ｈｍ２）条件下棉株Ｎ、Ｐ２Ｏ５、Ｋ２Ｏ养分的吸收动态。结果表明，棉花茎枝、叶片、花蕾、铃壳、籽棉中的Ｎ、Ｐ２Ｏ５的百分含量随生育进程呈下降趋势；Ｋ２Ｏ含量在铃壳中呈上升趋势，在其它器官中呈下降趋势。棉株对Ｎ、Ｐ２Ｏ５、Ｋ２Ｏ的吸收均呈Ｌｏｇｉｓｔｉｃ曲线变化，养分吸收的快速增加期出现在出苗后５８～９７天，此期约吸收了养分总量的６０％，是需肥最大的时期。在本试验中，每公顷产１８００ｋｇ皮棉，从土壤中吸收Ｎ为２４５．０～２７０．１ｋｇ，Ｐ２Ｏ５为７２．４～７５．５ｋｇ，Ｋ２Ｏ为２６９．５～２７１．９ｋｇ。
The nutrient absorption of N, P2O5 and K2O in cotton plants under high cotton yielding (1800 kg / hm2) in northern Xinjiang was studied. The results showed that the percentages of N and P2O5 in stems, leaves, buds, boll shells and seed cotton of cotton decreased with the growing process. The content of K2O increased in the bell shell and decreased in other organs. The cotton plants showed a logistic curve for the absorption of N, P2O5 and K2O. The rapid increase of nutrient absorption occurred in 58-97 days after emergence, which absorbed about 60% of the total amount of nutrients, which was the period with the greatest need of fertilizer. In this test, 1,800 kg of lint per hectare was produced, with soil N absorbing 245.0-270.1 kg, P2O5 72.4-75.5 kg and K2O 269.5-271.9 kg.