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杂草吸收水、肥能力很强,与烟草争夺水、肥、阳光和生存空间,妨碍和阻挠烟草的正常生长发育、降低烟草产量和品质。现将烟草田化学除草新技术的有关要点介绍如下:一、苗床化学除草①播前土壤处理。亩用50%大惠利可湿性粉剂100-150克加水50-70千克于烟草播种前5-7天均匀喷雾畦面后混耙于5cm深的浅土层中,整平畦面后再按常规方法播种,可有效防除马唐、牛筋草、稗草、狗尾草和千金子等1年生禾本科杂草;亩用40%磺草灵水剂300-400毫升加水50-70公斤,于播种前5-7天均匀喷雾地表(施药后至播种前要保持畦面湿
Weeds absorb water, fertilizer and strong ability to compete with tobacco for water, fertilizer, sunlight and living space, hinder and obstruct the normal growth and development of tobacco, reduce tobacco yield and quality. The tobacco field chemical weeding the relevant points of the new technology are as follows: First, seedbed chemical weeding ① sowing before soil treatment. Mu with 50% of the benefits of wettable powder 100-150 grams of water plus 50-70 kg 5 to 7 days before sowing the tobacco evenly spray 畦 surface after mixing rake in 5cm deep shallow soil, flattened noodles and then press Conventional methods of sowing, can effectively control civens, tendon grass, barnyard grass, Setaria viridis and stems and other 1-year-old grass weeds; acres with 40% Sulfasalazine 300-400 ml water 50-70 kg, The first 5-7 days evenly spray the surface (after spraying to keep wet before sowing