棉花具无限生长习性,不同铃期、不同环境条件和植株内部营养状况的改变,致使不同部位棉铃的纤维品质不同。棉纤维品质在植株上的空间分布乃至在每粒棉籽上的分布状况,前人已做过不少研究。棉花科学工作者为从理论上找出规律,以提高棉花纤维品质,通常采收中期花作为品质鉴定的试样。也有一些试验,常用开花期扣牌作标记,吐絮期采收标记铃来衡量各种措施对棉花产量及质量的影响程度。实践证明,在相 Cotton with unlimited growth habits, different bolls, different environmental conditions and plant internal nutritional status changes, resulting in different parts of the cotton boll fiber of different quality. The spatial distribution of cotton fiber quality in plants and even on the distribution of each cottonseed, many people have done a lot of research. Cotton scientists to find out the law in theory to improve the quality of cotton fibers, usually the mid-harvest flowers as the quality of the sample. There are also some tests commonly used to mark the flowering stage, bolting and bolting stage bolls to measure the impact of various measures on the yield and quality of cotton. Practice has proved that in phase