秸秆直接还田,作为肥料,实行以草养田,获得较好的增产效果。是自力更生、多快好省地解决肥源的好办法。一、秸秆直接还田的作用(一)增加土壤有机质,改良土壤:作物成熟时,把主要产品——籽实收获后,剩下来的秸秆直接还田,作为肥料。据测定,稻秸按2尺长度还田,一亩地按20万株计算,则每亩稻秸秆还田约700斤。玉米秸秆6尺长度还田,一亩地按4,000株计算,则 Straw directly back into the field, as a fertilizer, the implementation of grass to feed the field, access to better yield. It is a good way to solve the problem of manpower supply more efficiently and economically. First, the role of straw directly to the field (A) increase the soil organic matter, soil improvement: When the crop is mature, the main product - the seeds are harvested, the remaining straw directly back into the field, as a fertilizer. According to the determination of rice straw by 2 feet back to the field, according to an acre of 200,000 plant calculation, the return of rice straw per mu about 700 pounds. 6-foot-length corn stalks, an acre of 4,000 plant basis, then