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尿素化肥,由于各地大型化肥厂的陆续投产,它正在成为我国氮肥的主要品种。根据中国农科院土肥所、黑龙江农科院土肥所、江苏农科院土肥所的试验表明,尿素的肥效远未充分发挥,大有潜力。黑龙江的26处尿素试验中,有19处1斤尿素仅增产3—4斤粮食(玉米、谷子)。中国农科院土肥所5处小麦试验,1斤尿素增产不到2斤小麦。江苏农科院土肥所根据试验材料统计,尿素利用率也只为33%。据黑龙江全省统计,50万吨氮肥中,有15—20万吨的尿素和硝
Due to the successive operation of large-scale fertilizer plants in various places, urea fertilizer is becoming the main nitrogenous fertilizer species in our country. According to the Institute of Soil and Fertilizer, Chinese Academy of Agricultural Sciences, Soil and Fertilizer Institute of Heilongjiang Academy of Agricultural Sciences, Soil and Fertilizer Institute of Jiangsu Academy of Agricultural Sciences test shows that the urea fertilizer is far from full play, great potential. In 26 urea tests in Heilongjiang, 19 1 kg urea only increased 3-4 kg of grain (corn and millet). Soil and Fertilizer Institute of Chinese Academy of Agricultural Sciences 5 wheat test, 1 kg of urea yield less than 2 kg of wheat. Soil and Fertilizer Institute of Jiangsu Academy of Agricultural Sciences based on experimental materials statistics, urea utilization was only 33%. According to the statistics of Heilongjiang Province, 500,000 tons of nitrogen fertilizer has 15-20 million tons of urea and nitrate