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据研究,棉铃裂开后.第七天采摘的籽棉,纤维强度最高。七天后,纤维强度随日晒的时间延长而逐渐降低。据河北省农科院棉花研究所测定,冀棉8号,从吐絮第七天(9月13日)采摘的纤维强力为4.39克,10月7日采摘的纤维强力下降到3.65克。不适时摘花,不仅短绒率增加,而且籽棉的品级也降低。如开絮后7天收摘的籽棉品级为一级,10-12天采收的即降低一级。纤维聚合度,开絮后5天的为4720,开絮25天的为2833。因此,别忘了及时
According to the research, after the boll split, the seed cotton picked on the seventh day had the highest fiber strength. After seven days, the fiber strength gradually decreases with the time of daylighting. According to the Cotton Research Institute of Hebei Academy of Agricultural Sciences measured Ji Cotton 8th, from the sewer flutter on the seventh day (September 13) picked fiber strength of 4.39 grams, October 7 pick fiber strength decreased to 3.65 grams. Pick flowers unsuitable, not only increase the rate of short fiber, but also reduce the grade of cotton seed. Such as opened after 7 days to pick the seed cotton grade as a level, 10-12 days of harvest that is reduced by one. Degree of polymerization of the fiber, open 5 days after the film is 4720, open 25 days for the film 2833. So do not forget to be on time