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本文通过对１９８８、１９８９两年棉铃发育规律的研究得出：不同开花期的棉铃各组成部分子物质积累均呈“Ｓ”型曲线，可用Ｌｏｇｉｓｔｉｃ方程加以拟合，效果良好，相关系数都在０．９以上。棉子的干物质积累还可用直线方程模拟，效果更好，相关系数在０．９８以上。其中铃壳的干物质积累较快，最快时期在花后１０～１５ｄ，花后３０ｄ达最大值，但是大积累量、生长特征值随着开花期的向后推迟而逐渐增大；而棉子和棉纤维的干物质积累要延续到花后４５～５０ｄ才达到最大值，其增长速度最快的时期在花后２０～３０ｄ，它们的干物质最大积累量、生长特征值、旺盛生长期的长短是以中期开花的较高，前期和后期开花的较低。
In this paper, the research on the development of cotton bolls in 1988 and 1989 showed that all the components of cotton boll flowering at different flowering stages showed “S” curve, which could be fitted by Logistic equation with good effect and the correlation coefficients were all 0 .9 above. Cotton dry matter accumulation can also be used to simulate the line equation, the effect is better, the correlation coefficient of 0.98 or more. The dry matter accumulation of boll shell was faster in the fastest period, reaching the maximum at 10-15 days after anthesis and at 30 days after anthesis, but the accumulation of large amount and the characteristic value of growth increased gradually with the delay of anthesis at flowering stage. The dry matter accumulation of the seed and cotton fiber continued to reach the maximum 45 ~ 50 d after anthesis, and the fastest growth period was 20 ~ 30 d after anthesis, and their dry matter accumulation, growth characteristic, vigorous growth The length is higher in mid-flowering, lower in early and late flowering.