湖南省稻-稻-油三熟制油菜田杂草防治研究进展

杂草严重影响油菜的产量和品质，为了减少稻茬田杂草对油菜的危害，本文从种子库、杂草种类和杂草发生特点三方面介绍了湖南省稻-稻-油三熟制油菜田的杂草发生情况以及目前所采取的化学的、物理的、生物的和其它农作措施的杂草防治方法，并对未来油菜田杂草的综合治理进行了探讨和展望。结果表明，杂草种子库密度高达224 550 seed/m2，且三熟制油菜田的杂草主要以看麦娘、日本看麦娘、菵草、硬草、早熟禾等喜湿性的杂草为主，目前采用的防治方法以化学方法为主，其余的措施应用较少，对环境污染严重。因此积极研究推广综合友好型治理体系是湖南省稻-稻-油三熟制杂草的防治最优的选择。

Research Progress on Control Weed in Rice-Rice-Rape Cropping System Field in Hunan Province

Weeds seriously affect the yield and quality of rapeseed, in order to reduce the harm of weeds in rice field, this paper three introduced three aspects of weed seed bank, weed species and weed occurrence characteristics of rice rapeseed field in Hunan province and the physical, chemical, biological and other farming measures currently adopted, and the future of the comprehensive management of weeds in rape fields were discussed and prospected. The results show that the weed seed bank density of up to 224 550 seed / m2, and three harvests weeds in rape fields mainly Alopecurus aequalis, Alopecurus japonicus, Beckmannia syzigachne, Sclerochloa dura, Poa annaua and other wet weeds, chemically-based control methods, less the rest of the measures applied. At present, the control method is mainly used in chemical method, and the rest of the measures are used less, and the environment pollution is serious. Therefore, it is the best choice to actively promote the comprehensive friendly governance system to control weed in Rice-Rice-Rape cropping system field in Hunan province.