除草剂在农牧交错区保护性耕作燕麦田间应用效果的研究

Application of Herbicides in the Farming-Pastoral Ecotone's Conservation tillage Oat Fields

采用固定取样方法对保护性耕作燕麦田杂草种群和分布进行调查,并选用7种除草剂进行防除效果试验研究。结果表明:保护性耕作燕麦田杂草发生较为严重,且以阔叶杂草为主。播前喷施灭生性除草剂,以2250mL/hm2草苷膦处理防治效果较好;苗期茎叶喷施30g/hm2巨星和1125mL/hm22,4-D丁酯的株防效及鲜重防效分别超过了80%和90%,较其他处理效果明显,且产量增幅可达30%以上。

Use fixed sampling method to investigate fields. Efficacies of seven herbicides in conservation weed species and their distribution in conservation tillage oat tillage oat field were compared. The results showed that the weeds were serious and the broadleaf weeds were the main weeds in the fields. It had the best effect to apply Glyphosate of 2.25L/ha before sowing. The 2,4-D butylate and tribenuron had better effect than other treatments to control the broadleaf weeds in the fields,with the average effect on weed＇s plant and fresh weight of more than 80% and 90%, respectively;and could make oat yield inerease more than 30%.