中文摘要：

采用一锄、乙草胺、油力和草除·精喹混剂、10.0%油力以及17.5%草除.精喹EC 5种除草剂分别对大田冬油菜进行处理,研究不同除草剂对冬油菜田间杂草的控制作用及对田间透光率和油菜产量的影响。结果表明,17.5%草除.精喹EC对油菜田杂草具有较好的防除效果,苗期杂草的总体防效达到95%以上,随着时间的延长药效略有下降,成熟期时控草效果仍可达90%以上。各除草剂处理均能提高油菜产量（增5.1%～36.4%）,其中以一锄和17.5%草除·精喹EC处理产量增幅最高,并能显著提高油菜田间的透光率、植株的一次有效分枝数、主花序有效角果数以及单株有效角果数。

英文摘要：

The weed control effects of five kinds of herbicides and subsequent dynamics in rape fields, as well as the influence on the light penetration rate and crop yield were studied. The results showed that 17.5% benazolin ＆ quizalofop-pethyl provided good control effects on weeds in rape fields, the overall effects were more than 95% on seedling stage and more than 90% on adult stage, respectively. All of the 5 kinds of herbicides had an improving effect on crop yield （yield increase ranged from 5.1% to 36.4%）. Benazolin ＆ quizalofop-p-ethyl and Yichu application significantly improved yield The application of benazolin ＆ quizalofop-p-ethyl had no effect on the plant height and 1000-seed weight, whereas the light penetration rate, numbers of branches, siliquaes on main inflorescences and total siliquaes per plant were dramatically improved,resulting in a significant yield increase of rapeseed.