The paper discusses the reason and trend of weedcommunity evolution in paddy field.
从农业生产实际出发，对水稻田杂草群落演化原因及其趋势进行了综述。
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The effect of predator, parasitoid, insect pest and neutral insect groups in the arthropod community in the weed habitat on the corresponding groups in the paddy habitat were varied.
Investigation on the weed species and control techniques were done in 2001-2003. Speices and community distribution of weed had been found in farmland in Huaibei area.