花铃期是棉花一生中需水最多的时期,需水量占全生育期的40％,每昼夜每667平方米棉田需水3立方米左右,结成一个棉桃需水8公斤左右。花铃期干旱到来之前及早松土、培土,减少水蒸发,同时增施氮磷肥。有水灌的田块,要清理主沟、围沟、腰沟,作隔行浸灌的准备。有条件的地方,在棉行及早铺草。在干旱开始时,应用植物生长调节剂,可减轻干旱损失。用特多 The boll cycle is the period when cotton needs the most water in a lifetime. The water demand accounts for 40% of the whole growth period. Each day and night requires about 3 cubic meters of water for every 667 square meters of cotton field and forms about 8 kg of cotton bolls. Early rhododendron drought before the advent of soil, earth, reduce water evaporation, while increasing nitrogen and phosphorus fertilizer. Field irrigation with water, to clean up the main ditch, ditch, waist ditch, for interlaced irrigation preparation. Wherever conditions permit, weeding the cotton plant early. Application of plant growth regulators at the onset of drought can reduce drought losses. Use special and more