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对海岛棉与陆地棉不同开花日期棉铃发育过程中干物质积累进行测试,结果表明不同开花期的棉铃各组成部分干物质积累均呈“S”型曲线的变化,用直线方程加以拟合,效果良好,相关系数R均达到极显著水平。棉籽的干物质积累还可用直线方程模拟,效果更好,相关系数R在0.94以上。其中,铃壳的干物质最快时期在花后10~21 d,快速增长,花后21~28 d达最大值;而棉籽和棉纤维的干物质增长速度最快的时期在其花后21~42 d,花后干物质积累要延续到花后45~50 d才达到最大值。棉籽、棉纤维干物质最大积累量是以中期开花的较高,前期和后期开花的较低。
The dry matter accumulation in cotton bollworm (Gossypium hirsutum L.) and Upland cotton (Gossypium hirsutum L.) at different flowering dates was tested. The results showed that the dry matter accumulation of cotton bolls at different flowering stages showed “S” curve changes, which were fitted by the linear equation , The effect is good, the correlation coefficient R reached the extremely significant level. Dry matter accumulation of cottonseed can also be used to simulate the linear equation, the effect is better, the correlation coefficient R above 0.94. Among them, the boll shell dry matter fastest period of 10 ~ 21 d after anthesis, rapid growth, 21 ~ 28 d after anthesis reached the maximum value; cottonseed and cotton fiber dry matter growth fastest period after anthesis 21 ~ 42 d, dry matter accumulation after flowering continued to reach the maximum 45 ~ 50 d after flowering. The maximum accumulation of dry matter of cottonseed and cotton fiber is higher in mid-term flowering and lower in early-stage and late-flowering.