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在棉铃形成最后的10～12天,棉铃各组分干重和内部营养物质含量的变化均较大,高强力纤维品系 PD9223的变化幅度明星大于低强力纤维品种徐州514。因此,在棉铃能够正常成熟吐絮的情况下,采取任何催熟措施,使其过早结束成熟阶段,对种子和纤维发育都是不利的。特别是对优质纤维品种更为不利。高强力纤维品系 PD9223种仁中脂肪含量,显著高于低强力纤维品种徐州514,而蛋白质含量则显著低于徐州514。根据有关测定资料的相关分析,可以推断种子中脂肪和蛋白质含量与纤维品质可能也存在一定的联系。从两种纤维强度品种(系)年度间棉铃组分干物质分配的变化,可以看出,高强力纤维品系 PD9223棉铃发育对环境条件的敏感性大于低强力纤维品种徐州514。
During the last 10-12 days of boll formation, the dry weight and internal nutrient content of cotton bolls varied greatly. The variation range of high-strength fiber strain PD9223 was larger than that of low-strength fiber variety Xuzhou 514. Therefore, any boll ripening process can be carried out to allow the boll maturity to mature prematurely, which is detrimental to seed and fiber development. Especially for high-quality fiber varieties more detrimental. The fat content of high-strength fiber strain PD9223 kernel was significantly higher than that of low-strength fiber variety Xuzhou 514, while the protein content was significantly lower than that of Xuzhou 514. Based on the correlation analysis of the measured data, it can be inferred that the content of fat and protein in seeds may also be related to the fiber quality. It can be seen from the changes of dry matter partition of boll components between two fiber strength varieties (lines) that the development of cotton boll lines with high-strength fiber PD9223 is more sensitive to environmental conditions than low-strength fiber variety Xuzhou 514.