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本文以新陆早４号为材料，研究了北疆高产棉花群体（１８００ｋｇ·ｈｍ－２）条件下棉株Ｎ、Ｐ２Ｏ５、Ｋ２Ｏ养分的吸收特性。结果表明，棉花茎枝、叶片、花蕾、铃壳、子棉中的Ｎ、Ｐ２Ｏ５的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，养分吸收的快增期出现在出苗后５８～９７ｄ，此期吸收了约养分总量的６０％，是需肥最大的时期。棉株对养分的吸收分配中心与干物质积累分配中心一致。在本试验中，公顷产１８００～１９００ｋｇ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。
In this paper, Xinluzao 4 was used to study the nutrient absorption characteristics of N, P2O5 and K2O in cotton plant under high cotton yield (1800 kg · hm-2) in North Xinjiang. The results showed that the contents of N and P2O5 in stems, leaves, buds, boll shells and seed cotton of cotton decreased with the growing process. K2O content increased in the bell shell and decreased in other organs. Cotton plants showed a logistic curve for the absorption of N, P2O5 and K2O. The rapid increase of nutrient uptake occurred in 58-97 days after emergence, which absorbed about 60% of the total nutrients, which was the period with the greatest need of fertilizer. Cotton plant nutrient absorption and distribution center and dry matter accumulation and distribution center. In this experiment, 1800-1800 kg of lint per hectare absorbed 245.0-270.1 kg of N from the soil, 72.4-75.5 kg of P2O5 and 269.5-271.9 kg of K2O.