本文根据8年定位试验的资料,在前两报的基础上进一步阐述了中上肥力双季稻母实行有机—无机肥料配合施用,比单施化肥不仅有利于土壤有机质,全氮的积累、土壤磷素的有效化和促进水稻对氮、磷、钾养分的吸收利用,而且能增加土壤微生物,特别是细菌的总量、自生固氮菌等生理群的菌量和脲酶等主要土壤酶类的活性,从而收到培肥土壤、提高水稻产量的效果. Based on the data of 8-year experiment, this paper further elaborates the application of organic-inorganic fertilizers by middle and upper fertility double cropping rice based on the previous two reports, which is not only beneficial to the accumulation of soil organic matter and total nitrogen, Phosphorus is effective and promotes the absorption and utilization of nitrogen, phosphorus and potassium in rice, but also can increase the amount of soil microorganisms, especially bacteria, the amount of bacteria in the physiological groups such as Azotobacter and the activity of major soil enzymes such as urease , So as to receive soil fertility training and increase the yield of rice.