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为明确轻型栽培技术对稻田潜杂草群落多样性的影响,研究了旱直播、水直播、抛秧、机插秧、麦套稻5种轻型栽培稻作模式及传统手插秧模式下稻田杂草种子库的数量特征.结果表明:旱直播稻田种子库密度显著高于其他模式,达228416粒.m-2,麦套稻模式其次.另外,旱直播稻田莎草类杂草与麦套稻稻田阔叶类杂草种子密度显著高于其他模式的各类杂草种子.传统手插秧稻田具有最高的物种丰富度,Margalef指数达1.86;麦套稻与水直播模式中,Shannon-Wiener指数、Gini指数、Pielou群落均匀度指数明显高于旱直播和机插秧等模式.与传统手插秧相比,各轻型栽培稻作模式具有不同的潜杂草群落优势种.为防治稻田杂草的持续危害,应轮流实施不同轻型栽培稻作模式.
In order to clarify the effects of light-cultivation techniques on the diversity of weed communities in paddy fields, the effects of light direct seeding, water-direct seeding, seedling throwing, machine transplanting and wheat-paddy on five light-crop cultivation patterns and traditional hand- The results showed that the density of seed bank in direct-seeding rice was significantly higher than that of other patterns, reaching 228416. Second, wheat-rice and wheat-to-rice pattern.In addition, Leaf weed seed density was significantly higher than other types of weed seeds.Traditional rice planting has the highest species richness, Margalef index of 1.86; wheat sets of rice and water direct seeding mode, Shannon-Wiener index, Gini index , The Pielou community evenness index was significantly higher than that of direct seeding and transplanted rice.Compared with the traditional hand-transplanted rice, each light-cropping rice model had different dominant species of weedy weeds.In order to prevent the continuous damage of weed in paddy field, Take turns implementing different modes of light-crop cultivation.