目前,我省棉花种子质量普遍较差,种性退化比较突出,其主要表现是:①种子纯度低。1979年全省11个县大田种植的12个品种调查结果,平均纯度为88.7％,最低的只有73.3％。②衣分、绒长下降。目前全省棉花平均衣分为37.5％,比历史最高年低1.4％。有些棉产区衣分仅32—33％。棉花纤维长度也由29毫米下降到26毫米左右。③棉铃大小不一,铃重减轻。1980年全省10个原种场原种质量鉴定结果,鄂光棉平均铃重4.5克,比引进时低0.2克,大田平均铃重仅3克左右,④子型多样,子指变小。10个原种场的鄂光棉原种子指平均为9克,比原 At present, the quality of cotton seeds in our province is generally poor, and species degeneration is more prominent. The main performances of cotton seed are as follows: ① The purity of seeds is low. In 1979, the survey of 12 cultivars planted in 11 counties in the province showed an average purity of 88.7% and a minimum of 73.3%. ② clothing points, velvet long decline. At present, the province’s average cotton clothing is divided into 37.5%, 1.4% lower than the highest level in history. Some cotton production area only 32-33%. Cotton fiber length also dropped from 29 mm to about 26 mm. ③ different sizes of bolls, boll weight reduced. In 1980, the results of the identification of the quality of the original species in 10 original breeding farms in the province showed that the average boll weight of E Guangmian was 4.5g, 0.2g less than that of the imported ones. The average boll weight of the field was only 3g. 10 seed field of E Guang Mian Yuan seed means an average of 9 grams, more than the original