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棉花壮苗早发是早结铃、多结铃、结大铃,夺取棉花高产稳产的前提。俗话说:“发苗先发根,根发苗早发”。这就是说,要使棉花壮苗早发,先要促进棉花根系的生长发育,而棉花根系发育的好坏,又取决于能否有良好的土壤。在土质松软,耕作层深厚,灌排方便,肥力较高的土壤条件下,棉花根系的发育良好;在土壤板结,耕层浅,积水严重,肥力不高的情况下,根系发育差,扎根浅,棉株发育相应推迟,铃少铃小,产量不高。
Early seedling cotton seedling is early bell, more bell, knot bell, to seize the premise of high and stable yield of cotton. As the saying goes: “hair seedling first hair root, root hair seedling early hair.” This means that to make cotton strong seedlings early hair, we must first promote the growth and development of cotton roots, and cotton root development is good or bad, but also depends on whether there is good soil. Under the conditions of soil soft, deep tillage, convenient irrigation and drainage, and high fertility, root system of cotton is well developed. Under the condition of soil compaction, shallow plow, severe waterlogging and low fertility, root system of cotton is poorly developed and rooted Light, cotton plant development corresponding postponed, bell less bell, the yield is not high.