有的棉农在选留棉种时，习惯用塑料袋贮藏棉种，这样做是很不科学的。因为塑料袋透光不透气，用来装藏种子7密闭的塑料袋会出现袋内缺氧现象，影响种子的呼吸作用，使种子的生理机能失调，降低种子的发芽地和发芽率，不能达到苗齐苗全；严重缺苗时会影响棉花种植计划的完成。因 Some cotton farmers in the selection of cotton species, the habit of storing cotton species with plastic bags, this is very unscientific. Because the plastic bag is light and airtight, the plastic bag used to hold the seeds and sealed airtight will appear the phenomenon of anoxia in the bag, affecting the respiration of the seeds, causing the physiological functions of the seeds to be out of tune, reducing the germination and germination rate of the seeds, failing to reach Qi Miao whole seedlings; serious lack of seedlings will affect the completion of the cotton planting plan. because