水稻土有机-无机肥料配合施用的效应(之三)

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.

THE EFFECT OF MIXED APPLICATION OF ORGANIC AND INORGANIC FERTILIZERS IN PADDY SOIL(The third report)

Through eight years' experiment,it is further revealed that mixed applicationof organic and inorganic fertilizes in middle-high fertility paddy soil,compared with the application of only inorganic fertilizers,not only isbenefical to the accumulation of soil organic matter and total-nitrogen andthe effectiveness of the soil phosphorus,but also increases the amount of soilmicroorganisms,especially T.A.of bacteria and some physiologic race ofbacteria,such as azotobacters et al,improves the activities of some importantsoil enzymes,such as urease et al,and promotes paddy rice in drawing andutilizing soil nutriment,such as nitrogen,phospherus and potassium.Therefore,it has better effect of fertilizing soil and increasing rice yield.