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对两个不同生态类型的棉花高产品种，从开花前至盛铃期以前，模拟生产中常出现的四种棉田供水情况，研究表明：花铃期适水供应处理棉田，叶面积指数增长快、群体干物质积累速率高、产量高，主要原因在于棉花群体光合速率高，呼吸虽高，但呼吸所占比例较低所致。后旱处理对棉花的产量影响不明显，但可大大提高水分利用率。中后旱处理对棉花产量及水分利用效率影响最大；新陆早７号忍耐中后期干旱较弱于新陆早６号。
For two high-yielding cotton varieties with different ecological types, the water supply conditions of four cotton fields appeared before flowering before flowering to simulate the production. The results showed that the leaf area index increased rapidly in the flowering-suitable period, Dry matter accumulation rate is high, the yield is high, mainly due to the high photosynthetic rate of cotton population, high respiration, but the proportion of respiration due to lower. After drought treatment on the yield of cotton is not obvious, but can greatly improve water use efficiency. Mid-and-late drought treatment had the greatest impact on cotton yield and water use efficiency. Xinluzao 7 was less resistant to mid-late drought than Xinluzao 6.