黄淮海平原,六、七十年代“三料”(燃料、饲料、肥料)短缺,近年来,随着农业生产的发展,秸秆量急剧增多,“三料”矛盾不足开始得到解决。但目前仍存在“重化肥、轻有机肥”的倾向,加之绿肥面积大幅度下降,使土壤养用失调的问题更加突出。因此,合理施用化肥,增加秸秆还田数量,千方百计挖掘有机肥 Huanghuaihai Plain, the shortage of “three materials” (fuel, feed, and fertilizer) in the 1960s and 1970s. In recent years, with the development of agricultural production, the amount of straw increased sharply and the contradiction between the “three materials” began to be solved. However, there is still a tendency of “heavy chemical fertilizers and light organic fertilizers”. In addition, the area of ​​green manure has dropped sharply, making the problem of soil nutrient imbalance even more prominent. Therefore, the rational use of fertilizers, increase the amount of straw returned, do everything possible to tap organic fertilizer