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前言由于尿素具有挥发、烧种、流失等弊病,自1978～1983年,对尿素秋深施效果进行了研究。试验和实践表明,黑龙江八一农垦大学在1980～1983年秋施比春施增产11.8％,每斤尿素多增产小麦1～1.5斤,氮肥利用率增加了9.53％。八五五农场1978～1983年推广秋深施肥20.2万亩,平均增产13.1％,多增产小麦3458.6吨,收益增加114.4万元。
Preface Due to the volatility of urea, burning seed, loss and other ills, from 1978 to 1983, the effect of urea autumn deep effects were studied. Experiments and practices show that in Heilongjiang August First Land Reclamation University, the spring yield increased 11.8% from spring to 1980-1983, the output of wheat increased by 1 to 1.5 kg per mu urea and the utilization rate of nitrogen fertilizer increased 9.53%. 855 farms 1978 ~ 1983 promotion of autumn and deep fertilization of 202,000 mu, an average increase of 13.1%, an increase of 3458.6 tons of wheat and more yield increased 114.4 million yuan.