近两年来,伴随棉花产量的提高,原棉品级和品质有明显下降。咎其原因,与近两年大力提倡的采摘老铃有关。这批棉铃的铃龄五十天,壳黄嘴开裂。实验证明,半开棉铃的纤维强力为2.7～2.9克,而全开棉铃的纤维强力则为3.8～4.0克。。由此可见,强行采摘的老铃,棉花并未真正成熟,不仅纤维成 In the past two years, along with the increase of cotton output, the grade and quality of raw cotton have obviously dropped. To blame for the reason, and in the past two years strongly advocated picking old bell. The bolls of these cotton bolls are fifty days old and their shells are yellow-fissured. Experiments show that the semi-open bolls fiber strength of 2.7 to 2.9 grams, while the full-boll fiber strength is 3.8 to 4.0 grams. . This shows that forcing the old bell, cotton is not really mature, not only fiber into