长期稻-稻-绿肥轮作对水稻产量的影响

Effects of Long-Term Rice-Rice-Green Manure Rotation on Rice Yield

为探讨湘南红壤稻田多熟制的增产潜力,不断提高经济效益和土壤肥力,促进农业可持续发展,从1982年开始,对红壤稻田布置了紫云英(T1)、油菜(T2)、黑麦草(T3)绿肥翻压还田对水稻产量及生长发育影响的长期轮作制度定位试验。27年的研究结果表明:1)与冬闲(CK)处理相比,种植绿肥处理能促进水稻增产,增产幅度依次为T1>T2>T3;2)与CK相比,绿肥处理下水稻年产量与CK处理间差异随年份增加而增大;T1处理与T2、T3处理间及T2处理与T3处理间差异也是如此。

In order to study the potential yield of multiple cropping systems in red paddy soil in Southern Hunan Province,continuously improve the economic benefit and soil fertility,promote agricultural sustainable development,a long-term rice-ricegreen manure rotation experiment has been arranged since 1982.In the experiment,milk vetch（Astragalus sinicus）,oilseed rape（Brassica napus）and rye grass（Lolium）were planted as green manures,and represented by T1,T2and T3,respective-ly,and winter fallow as CK.Compared with CK,planting green manures could promote rice yield with the order of T1T2 T3.The difference of annual rice yield between planting green manures and CK increased with the passing years,so did the differences between T1and T2,T1and T3,T2and T3.