近年来,虽对秸秆还田好处作了广泛宣传,各级生产部门也作了动员号召,但秸秆还田仍不很普遍,这是因为留在田里的秸秆不能很好地与土壤混合,耕作不便,插秧难。因此,农民常常把它烧掉,剩下灰分还田。这样钾和矿质养分虽能保留下来,但秸秆中能补充土壤肥力的重要因子氮和有机质等都损失掉了,这是一种自然资源的浪费。实践证明: In recent years, although the benefits of straw returning have been widely publicized, the production departments at all levels have made mobilization calls, but straw returning to the soil is still not very common because the straw left in the fields can not be well mixed with the soil, Tillage inconvenience, planting difficult. Therefore, farmers often burn it, leaving the ash back to the field. Although potassium and mineral nutrients can be retained, the nitrogen and organic matter, which are the important factors that can supplement soil fertility in straw, are lost. This is a waste of natural resources. Practice shows that: