棉花是需肥较多和营养元素较全的经济作物。每生产50公斤皮棉,约需从土壤中吸收氮素(N)5～9公斤,磷素(P_2O_5)2～3公斤,钾素(K_2O)4～7公斤。生产皮棉75公斤,约需吸收氮素6～11公斤,磷素3～4公斤,钾素6～10公斤,生产皮棉100公斤,约需吸收氮素10～13公斤,磷素4～6公斤,钾素8～13公斤和少量微量元素。棉花在生长发育过程中,如果缺少了 Cotton is a more cash-rich and nutrient-rich cash crops. Each production of 50 kg lint, about from the soil to absorb nitrogen (N) 5 to 9 kg, phosphorus (P_2O_5) 2 to 3 kg, potassium (K_2O) 4 to 7 kg. Production of lint 75 kg, about 6 to 11 kg of nitrogen to be absorbed, phosphorus 3 to 4 kg, potassium 6 to 10 kg, 100 kg of lint, about the need to absorb nitrogen 10 to 13 kg, phosphorus 4 to 6 kg , Potassium 8 ~ 13 kg and a small amount of trace elements. Cotton in the process of growth and development, if missing