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公主岭市黑林子镇农民吴德发在两亩瘠薄地上做对比试验,取得较好的增效。他在1997年4月16日播种四密25杂交玉米时,每亩施尿素30公斤,按30%加入尿素增效剂混拌后施入,并配施二铵10公斤,玉米专用肥15公斤,生物钾肥2公斤,锌肥1.5公斤,所有这些肥料连追肥带基肥一次性深施垄底约18厘米处。对同一地块的对照田施肥量相等,在玉米拔节后期每亩追施尿
Gongzhuling Heinzizhen Wu Peifa farmers in the two acres of infertile land to do comparative experiments and achieved better efficiency. When he sowed Si-25 hybrid corn on April 16, 1997, he added 30 kg of urea per acre and mixed it with urea synergist at a rate of 30%. The plant was given 10 kg of diammonium and 15 kg of corn-specific fertilizer , 2 kilograms of bio-potash, 1.5 kilograms of zinc, all of these fertilizers even with a one-time basal fertilizer deep-applied facilities about 18 cm at the ridge. Fertilizers on the same plot of the same land fertilizers the same amount, in the late corn jointing per acre urine