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一、水稻旱种化学防除方法 旱稻田的主要杂草种类较多,防除时主要采取“封”、“杀”、“补”。“封”是播后苗前用化学方法封闭地面杀灭主要杂草群落;“杀”是苗后针对旱稻田杂草选用对路除草剂除杂草;“补”是补救封闭及苗后防除效果不好的田间除草。 1.播后苗前土壤封闭除草 667平方米可用25％除草醚可湿性粉剂500—600克或50％杀草丹乳油300毫升,或30％胺草磷乳油400—500毫升,或80％五氯酚钠可湿性粉剂500—750克,或60％丁草胺乳油100毫升等。为了提高防效,扩大杀草谱,生产上常将两种除草剂混用,例如25％除草醚+20％二甲四氯水剂(5:2)700克,或50％
First, chemical control methods of dry cultivation of rice Dry weeds in the weed species are more control to take the main “seal”, “kill” and “fill.” “Sealing” is sowing seedlings before the chemical method to close the ground to kill the main weed community; “kill” is the post-emergence weed selection for weeds in weedless weed control weeds; “Bu” is remedial closure and post-emergence control Bad weeds in the field. 1. After sowing seedling soil closed weeding 667 square meters available 25% of weeding ether 500-600 grams of wettable powder or 50% to kill grass Dan-Dan 300 ml, or 30% Amoxicillin 400-500 ml, or 80% five 500-750 grams of sodium chloroplatinate wettable powder, or 60% butachlor EC 100 ml and so on. In order to improve control efficiency and expand herbicide spectrum, two kinds of herbicides are often mixed in production, for example, 700 grams of 25% of weed-ether, 20% of dichloromethane (5: 2), or 50%