冀西北油用亚麻田杂草调查及化学防控技术研究

The Weed Investigation and Chemical Control Technology Research in Oil Flax Field of the Northwestern Hebei

本文系统调查了冀西北地区油用亚麻田苗期杂草种类、群落及优势杂草，并开展了化学除草防除试验。结果表明，本区域油用亚麻田苗期杂草种类有16科43种，禾本科、菊科、藜科、蓼科，苋科为优势种，占杂草种类55．3％。优势杂草主要有藜、苦荞、狗尾草、野糜子、苋、野燕麦、苣荬菜、卷茎蓼、芦苇、皮碱草和野油菜11种。杂草群落类型为2～12元群落，以6—9元群落居多。试验筛选出防除阔叶杂草除草剂40％2·甲辛酰溴乳油等3种，防效在85％左右；防除禾本科杂草的除草剂10．8％高效盖草能等7种，防效在90％以上。筛选的所有除草剂对胡麻安全，可以在油用亚麻产区大面积推广应用。

The weed types,communities and dominant weed species in oil flax field of the northwest- ern Hebei in the seedling stage were studied systematically, and chemical weed control test was carried out. The results showed that the weed types of local area in the seedling period of flax classified as 43 species weed of 16 families, and the dominant fami]Jes were Gramineae,Compositae,Chenopodiaceae,Po- ]ygonaceae and Amaranth which accounted for 55.3% of all types. The dominant weed species were 11 , such as Chenopodium album L. , agopyrum tataricum（ L. ） Gaerth, Setaria v/r/d/s （L） Beauv. and et,al. The weed was 2 ~ 12 yuan community, and 6 ~9 yuan community was more than the others among them. Three kinds of controlling broadleaf weed herbicides were se]ected which control effects were above 85 % ,and the one of them was 40% 2 methyl octanoyl deltamethrin EC ;Seven kinds of controling gramineae herbicides were selected which control effects were above 90%, and the one of them was 10.8% Haloxy- fop - r - methyl. All herbicides screened were safe for oil flax and were suitable for popularizing and ap- plying in large area.