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调查了中耕除草、翻耕，化学除草、翻耕和化学除草、免耕等三种稻茬移栽油菜田的杂草群落。比较了三种杂草群落中草种群的频度和平均优势度率；观察了翻耕移栽油菜田草的发生消长规律；并对草种群发生量加大的原因进行了初步的分析。
The weed communities of three types of stubble transplanting rape fields such as weed control, tillage, chemical weeding, tillage and chemical weeding, no tillage were investigated. The frequency and average dominance rate of the Chinese grass population in three weed communities were compared. The growth and decline of grass in the transplanted tillage rape field were observed. The reasons for the increase in grass population were also analyzed.