棉花为什么要进行“五分”?棉花“五分”,就是分收、分晒、分存、分轧、分售。进行“五分”是棉花生产的需要。棉花是常异花授粉作物,一般约有5%的种子通过昆虫传粉而发生自然杂交;有的自然杂交率甚至超过20%。一个棉花品种种久了,会发生遗传分离;外界环境的影响,会使棉花重要性状在遗传性上发生变异。分离和变异, Why cotton for “five points”? Cotton “five points”, that is, points, sun, share, sub-rolling, sub-sales. The “five points” is the need for cotton production. Cotton is often cross-pollination crops, usually about 5% of the seeds by the insect pollination and natural hybridization; some of the natural hybridization rate even more than 20%. A variety of cotton varieties for a long time, there will be genetic separation; the impact of the external environment, will make the important traits of cotton genetically mutated. Separation and variation,