浅析油稻轮作双免栽培模式下直播稻田杂草群落演替及综合治理策略

随着油稻轮作双免栽培模式的长期推广与应用,稻田耕作制度、栽培方式、水分管理、田间温室效应发生了相应的变化,稻田杂草害日益突出,草相更加复杂,稻田杂草的优势种群和群落演替较快,现已成为免耕直播稻生产上的一大灾害。针对油稻轮作双免栽培模式下直播稻田杂草种群的变化特点、发生演替的原因及杂草发生的态势作了具体分析,并提出了合理的治理策略。

The Succession of Weed Communities and Comprehensive Preatmenst in Direct Seeding Paddy Field with Double-free Culture of Rice-Rape Rotations

With the long-term extension and application of the Double-free Culture of Rice-Rape Rotations mode, the corresponding variations appear on system of cultivation, cultivation mode, water management and greenhouse effect, the harm of weeds in paddy field have become more serious and grass become more complex, the succession of the weeds dominant species and community become faster, which has been one disaster on the production of no-tillage direct seeding paddy field. Analyzed the variation of weed communities in direct seeding paddy field under the double-free culture of Rice-Rape rotations, the reason of succession and the situation of weeds were happened, and proposed the streamlined management strategy.