我省约有冬水田1,800万亩,由于长期大量偏施化学氮肥和水稻产量不断提高等原因,有机质支出多,收入小。据土壤普查测定,全省目前冬水田有机质含量只有60年代的1/3,相当于发达国家土壤有机质的1/2—1/5,因而造成水稻严重坐蔸(全省每年因坐蔸损失稻谷约12亿斤,其中冬水田占90％左右)等许多生理性病害。冬水田踩青是提高稻田有机质含量,防止水稻坐蔸的有效办法。冬水田秋季踩入青肥,气温较高,时间很长,可以充分腐 There are about 18 million mu of winter paddy fields in our province. Due to the long-term large amount of partial chemical fertilizers and the increasing production of rice, the organic matter spends more and the income is small. According to the soil census, the total organic matter content in winter paddy fields in the province is only 1/3 of that in the 1960s, which is equivalent to 1 / 2-1 / 5 of the soil organic matter in developed countries, resulting in severe rice sitting (the annual loss of paddy in the province About 1.2 billion kg, of which about 90% of winter paddy fields) and many other physiological diseases. Winter paddy field trampling green is an effective way to improve the organic matter content of rice paddy and prevent rice from sitting. Winter paddy step into the green manure, the temperature is high, a long time, can be fully rot