磷是棉花生长过程中重要的营养成分 ,主要靠根系从土壤中吸收。棉花幼苗期尤其是三叶期以前 ,根系还不发达 ,从土壤中吸收磷的能力比较低 ,主要靠种子自身的储存来满足 ,而种子内磷含量是有限的。利用 KH2 PO4 溶液浸种能增加棉种内磷含量 ,而 KH2 PO4 溶液是一种盐溶液 ,浓度 Phosphorus is an important nutrient in the growth of cotton and is mainly absorbed from the soil by roots. Before the seedling stage, especially before the three-leaf stage, the root system is underdeveloped and the ability to absorb phosphorus from the soil is relatively low, mainly due to the seed’s own storage, while the phosphorus content in the seed is limited. KH2 PO4 solution soaking can increase cotton seed phosphorus content, and KH2 PO4 solution is a salt solution, the concentration