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以辽河流域棉区的主栽品种辽棉19号和较早引进的抗虫棉品种AC-33B为试验材料,通过花后连续取样,测定棉铃及其各组成部分的干物质累积量,并以此为基础,计算干物质累积速率和分配比例,形成模拟模型。研究结论认为,两个品种在棉铃干物质累积量、累积速率、分配比例上呈现相似的规律。除AC-33B的纤维发育模型外,各指标的发育都符合“S”型曲线。铃壳干物质累积量先期较多,累积速率在第16天左右达到高峰,分配比例在前期占有绝对优势,之后迅速下降。棉子和纤维的干物质累积量后期增长幅度较大,累积速率波动较大,分配比例呈较平稳上升趋势,最终干物质所占比例排序为棉子>纤维>铃壳。
Taking the main cotton variety Liaomian 19 and the earlier introduced insect-resistant cotton variety AC-33B as experimental materials, the dry matter accumulation of cotton boll and its components were determined by the continuous sampling after anthesis, Based on this, the dry matter accumulation rate and distribution ratio were calculated to form a simulation model. The conclusion of the study is that the two cultivars showed a similar pattern of accumulation, accumulation rate and distribution proportion of dry matter of boll. Except for the fiber development model of AC-33B, the development of each index accords with the “S” curve. The dry matter accumulation of conch shell was earlier and the cumulative rate peaked on the 16th day. The distribution proportion occupied the absolute predominance in the early period and then decreased rapidly. The accumulation of dry matter of cottonseed and fiber showed a larger increase in the later stage, the fluctuation of accumulation rate was larger, and the distribution ratio showed a steady upward trend. The proportion of dry matter in the final order was cottonseed> fiber> boll shell.