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为减少在旱作土壤上追施碳铵、尿素的氨挥发损失,中国农科院土肥所和北京农业工程大学共同主持了适于早作土壤的追肥机具及其提高氮肥肥效的技术措施的研究课题。于1983-1986年组织了15个单位在京、冀、鲁、豫、皖五省市11个县开展试验、示范。在深施碳铵、尿素的关键性技术方面取得较好的成果,主要结论如下:
In order to reduce the ammonia volatilization loss of topdressing ammonium bicarbonate and urea on dry soil, the Chinese Academy of Agricultural Sciences Soil and Fertilizer Institute and Beijing Agricultural Engineering University co-chaired the top-dressing equipment suitable for early soil and the technical measures to improve the efficiency of nitrogen fertilizer Question. In 1983-1986, 15 units were organized to carry out experiments and demonstrations in 11 counties in five provinces and municipalities of Beijing, Hebei, Shandong, Henan and Anhui. In the deep application of ammonium bicarbonate, urea, the key technology has achieved good results, the main conclusions are as follows: