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农户贮藏棉种的时间有3～4个月之久,在此过程中由于人为的疏忽和自然因素的干扰,种子质量极易下降。加之近两年干旱和虫害的影响,使种棉晚发、晚搭架,秋桃比例大,嫩瘪子多,种子数量少等情况。科学地进行棉种精选贮藏,是确保棉花播种面积和播后全苗的有效措施。一、纯根据本品种的形态特征,结合大多数种子的形态特征进行鉴别。粒选时,剔除大白子、稀毛子、绿子、光子、异形子、小粒子,要求原种纯度不低于99%,一代不低于98%,二代不低于97%。农户精细粒
The time for the farmers to store cotton species is 3 to 4 months, during which the quality of the seeds can easily drop due to the interference of man-made negligence and natural factors. Coupled with the impact of the past two years of drought and pests, so that late cotton seedlings, late shelves, large proportion of autumn peach, tender defoliation, the number of small seeds. Scientific selection of cotton seed storage, cotton sowing area is to ensure that the effective measures and after sowing. First, pure According to the morphological characteristics of the species, combined with the morphological characteristics of most seeds for identification. In the process of pelleting, the purity of the original species is no less than 99%, the generation no less than 98% and the second generation no less than 97%, excluding the white albino, rarefruit, green, photon, alien and small particles. Farmers fine grain