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中文摘要：
以油菜-双季稻、冬闲-双季稻、油菜-一季晚稻和冬闲-一季中稻4种湖南省稻田的典型种植模式为研究对象．运用农业生态学中价值流的观点进行了比较研究和综合评价。结果表明，油菜-双季稻为最优种植模式。同时从净产值、生产成本和物质费用方面对4种模式的经济效益动态变化进行了比较，分析了油莱-双季稻模式的生产成本和物质费用构成的变化及其原因。
英文摘要：
The study compared and evaluated four typical rice cropping patterns which were rape-rice-rice triple cropping, winter fallow-rice-rice double cropping, rape-late rice double cropping and winter fallow-medium rice by utilizing the view of value stream in agricultural ecology. The results showed that rape-rice-rice triple cropping was the best one. Meanwhile, the cost-effectiveness change of four patternswas analyzed in several aspects, such as net output, production cost and mate- rial cost. The changes and the reasons were illustrated on the cost of production and material of rape-rice-rice triple cropping.
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