增施肥料是小麦生产的一项重要措施,其中氮肥投资约占总生产投资(不包括用工)的70%以上。因此,经济使用氮肥,提高肥效,是实现小麦大面积“高、稳、低”的关键问题。根据我所及许昌、禹县、临颖等县农科所和部分大队试验站,1978年和1979年试验资料,对小麦氮素化肥经济使用技术的若干问题进行了初步总结。 Fertilization is an important measure of wheat production, of which nitrogen fertilizer investment accounts for about 70% of total production investment (excluding labor). Therefore, using nitrogenous fertilizer economically and improving fertilizer efficiency are the key issues for realizing “high, stable and low” wheat in large area. According to the data from the 1978 and 1979 experimental stations of agricultural institutes and some brigades in Xuchang, Yuxian and Linying counties, and so on, we carried out a preliminary summary of some issues concerning the economic use of nitrogen and nitrogen fertilizers in wheat.