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研究了北疆高产棉花（皮棉１８００ｋｇ·ｈｍ－２）干物质积累的过程，结果表明，棉花干物质积累过程可用Ｌｏｇｉｓｔｉｃ曲线方程表达；根据干物质积累规律，把干物质积累速率曲线上的两个特征点之间的区域称为干物质积累的“关键时期”，通过计算，干物质积累的关键时期出现在７月上旬至８月中旬，这时玛河流域棉区棉株生长正处于花铃期，从而为加强花铃期田间管理提供了依据。在高密度条件下，地上部总干物质、茎叶干物质积累的最快时期提前出现，关键时期有提早趋势。
The dry matter accumulation of high-yielding cotton (1800 kg · hm-2 lint of northern cotton) was studied. The results showed that the process of cotton dry matter accumulation could be expressed by Logistic curve equation. According to the dry matter accumulation law, the dry matter accumulation rate curves of two The area between the characteristic points is called the “critical period” of dry matter accumulation. Through calculation, the critical period of dry matter accumulation occurs from early July to mid-August when cotton plants grow in the cotton fields in the Mar River Basin So as to provide the basis for strengthening field management during flower-boll stage. Under the conditions of high density, the fastest dry matter accumulation of stems and leaves at the shoots occurred ahead of time, and the earlier period was observed in the key period.