为筛选用于稻茬紫云英繁殖田阔叶杂草防控的土壤处理用除草剂，选取80%唑嘧磺草胺水分散粒剂、960 g/L精异丙甲草胺乳油、33%精异丙甲草胺·丙炔氟草胺微囊悬浮剂、330 g/L二甲戊灵乳油4种除草剂，在紫云英播后苗前进行土壤喷雾处理，评价其对紫云英的安全性及对阔叶杂草的防控效果。结果表明，紫云英播后第2天，使用80%唑嘧磺草胺水分散粒剂或330 g/L二甲戊灵乳油进行土壤封闭处理对紫云英较安全，且对田间阔叶杂草的防控效果较好，株防效分别为75.26%、82.74%，鲜重防效分别为46.09%、61.09%。

In order to screen the herbicides used in soil treatment to control broad-leaved weeds in the breeding field of Astragalus sinicus after rice, 4 herbicides including 80% flumetsulam water dispersion granules, 960 g/L S-metolachlor emulsifiable concentrate, 33% S-metolachlor·flumioxazin microcapsule suspension and 330 g/L pendimethalin emulsifiable concentrate were selected and soil spray treatments were applied before seedling emergence of Astragalus sinicus, and their safety and control effect on broad-leaved weeds were evaluated. Results showed that soil spray on the second day after sowing Astragalus sinicus, 80% flumetsulam water dispersing granules and 330 g/L pendimethalin emulsifiable concentrate were safe for Astragalus sinicus and had the best control effect on broad-leaved weeds in the field, plant control efficiency were 75.26%, 82.74%, respectively, whereas fresh weight control efficiency were 46.09%, 61.09%, respectively.

S451.2

现代农业产业技术体系建设专项(CARS-22)。