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小麦生育后期叶面喷磷,可防止小麦脱肥早衰,促进早熟,减轻干热风的危害,增加产量。1983年4月17日—5月29日,我省组织有关单位在运城、临汾、忻州三市和永济、临猗、稷山、曲沃、太谷、文水、清徐等25县以及太原市南郊区共141.87万亩冬麦田,喷洒了磷酸二氢钾。其中运城市20.4万亩连片麦田用飞机喷洒,其余用人工喷洒.一、增产效果全省共安排130个观察点,各观察点位于喷洒麦田的中央,选择生长比较均匀一致的地方,设置4个对照.对照点在喷洒前5分钟,用塑料薄膜覆盖小麦植株,喷洒过后,马上揭开。据飞机喷洒的18个观察点统计,小麦喷洒磷酸二氢钾后,平均每亩增产32.2斤,增产率平均为5.7%。运城市岳坦大队增产率最高为11.5%;董杜大队最低为0.6%。
Wheat late leaf spraying phosphorus, wheat can prevent premature aging, promote early maturity, reduce the hazards of dry hot wind, increase production. April 17, 1983-May 29, the province organized the units in Yuncheng, Linfen, Xinzhou and Yongji, Linqu, Jishan, Quwo, Taigu, Wenshui, Qingxu and other 25 counties and Southern suburbs of Taiyuan, a total of 1,418,700 acres of winter wheat fields, sprayed with potassium dihydrogen phosphate. Of which 204.4 thousand hectares of contiguous wheat fields in Yuncheng City were sprayed by airplanes and the rest were sprayed by hand.One effect of increasing production A total of 130 observation points were arranged in the whole province and the observation points were located in the middle of the sprayed wheat fields and the places with relatively uniform growth were selected and set as 4 A control point five minutes before spraying, covered with plastic film wheat plants, spraying immediately after the start. According to the statistics of 18 observation points sprayed on the aircraft, after spraying potassium dihydrogen phosphate, the average yield per mu was 32.2 kg and the average rate of increase was 5.7%. Yuncheng Yuentan brigade yield up to 11.5%; Dongdu brigade minimum of 0.6%.