Late autumn peach seed. Peach lacks nutrients in late autumn, the boll weight is reduced, and the maturity is poor. Therefore, the germination power is weak and the germination rate is low. Severely degraded species. Cotton is often an out-of-breed crop, and its outcross rate is 5% to 7%. In some cotton areas, some cotton farmers have not changed new varieties for many years. The purity of cotton seeds is reduced to about 80%, and the number of lints is reduced to about 36%. Short, yield and quality do not meet the requirements of high-yield cotton. Ethephon sprayed cottonseed. Although spraying ethephon has the effect of promoting the early maturing of cotton, due to the release of ethylene, the nutrient in the cotton husk and cottonseed is transported to the cotton fiber in large quantities. The cottonseed own nutrient supply is in short supply, with few seeds, many new seeds, and serious seed damage. Cotton seeds basking on a cement field. Seed drying on cement ground, especially in cotton seed with high water content, due to high ground temperature, cottonseeds breathe vigorously, and the physiological function in the body is damaged. Some cottonseeds are smashed into dumb seeds and completely lose their ability to germinate. Cottonseeds stored together with pesticides and fertilizers. Some units or farmers mistakenly stored cotton seeds with pesticides and fertilizers. Because both pesticides and chemical fertilizers emit toxic gases, they damage the normal physiological functions of cottonseeds and greatly impair germination.