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1、重施花铃肥补施盖顶肥(1)初花后1个月左右的时间,约需一生总氮量的60%。因此开花阶段各种长势的棉田都要重施花铃肥,一般每亩施硫酸铵15-25公斤,或追施尿素10-15公斤,时间掌握在初花期;对地力弱、长势差、密度大的棉花施肥时间可提前到盛蕾期,每亩追施尿素12-15公斤或硫酸铵20-30公斤;长势旺、迟发晚熟的棉花,追肥时间也可推迟到盛花期,追肥量适当减少。离棉株30厘米左右,要深施8-10厘米。
1, re-implementation of Huafeng fertilizer cover top fertilizer (1) about 1 month after the first flowering about the life-long total nitrogen 60%. Therefore, the various flowering stage of the cotton fields are re-applied Huaxian fertilizer, ammonium sulfate per mu generally 15-25 kg, or topdressing urea 10-15 kg, time to grasp the early flowering; weak on the ground, growing poor, high density Of the cotton fertilizer time can advance to Sheng Lei period, topdressing urea per acre 12-15 kg or 20-30 kg of ammonium sulfate; growing Wang, delayed late maturity cotton, top dressing time can also be postponed to the full bloom, the amount of fertilizer appropriate to reduce . About 30 cm away from the cotton plant, to 8-10 cm deep.