4种除草剂对大豆玉米带状复合种植区杂草的田间药效评价

Field Efficacy Evaluation of Four Kinds of Herbicides on Weeds in Soybean-Corn Strip Compound Planting Area

2022年,汉中市首次推广大豆玉米带状复合种植技术,并在镇巴县九阵坝村精心打造了玉米大豆带状复合种植示范基地,该基地也是国家农业农村部确定的全国10个大豆玉米复合种植示范点之一。为了明确不同类型的除草剂对大豆玉米带状复合种植区杂草的防除效果,本研究测定了96%精异丙甲草胺EC、80%唑嘧磺草胺WG、33%二甲戊灵EC和50%乙草胺EC 4种除草剂的大田防效,结果表明:96%精异丙甲草胺EC 900~1200 mL/hm^(2)+80%唑嘧磺草胺WG 56.25~75 g/hm^(2)以及33%二甲戊灵EC对阔叶杂草有较好的防效,而33%二甲戊灵EC的总草株防效和鲜重防效均显著优于其他处理,并且对禾本科杂草也具有较好的防效。这说明33%二甲戊灵EC具有较广的杀草谱,且防效稳定。综合所有防效结果及生态安全,33%二甲戊灵EC对大豆玉米带状复合种植田间杂草的防除效果最好。

In 2022,the belt-shaped compound planting technology for soybean and corn was extended in Hanzhong at the first time,and a demonstration base for belt-shaped composite planting of corn and soybean was established in Jiuzhenba Village.The base is one of the 10 national demonstration sites for soybean and corn compound planting,which was verified by the Ministry of Agriculture and Rural Affairs.In order to clarify the control effects of different types of herbicides on weeds in the soybean-corn strip compound planting area,control effects of the EC of 96%metolachlor,80%of flumesulfame WG,and the EC of 33%pendimethalin.and 50%acetochlor EC were determined in field.The results showed that 96%metolachlor refined metolachlor EC 900~1200 mL/hm^(2)+80%flumetsulam WG 56.25~75 g/hm^(2) and 33%pendimethalin EC has a good control effect on broad-leaved weeds,and the control effect of 33%pendimethalin EC on the total grass plant and fresh weight is significantly better than other treatments,which is effective on grass weeds and also has better control effect.33%pendimethalin EC has a broad herbicidal spectrum and stable control effect.Overall,33%pendimethalin EC has the best control effect on weeds in the field of soybean-corn strip compound planting.