【摘要】 为寻找有效防除大豆玉米复合种植田杂草的封闭除草剂，采用土壤封闭喷雾处理开展了砜吡草唑和嗪草酮复配对大豆玉米带状复合种植田杂草防效及作物安全性评价。田间试验结果表明，砜吡草唑与嗪草酮混配组合对田间杂草表现出良好的防除效果，且对大豆、玉米安全。在40%砜吡草唑SC+480 g/L嗪草酮SC的不同混配组合中，中用量(165+414 g a.i./hm~2)、高用量(180+432 g a.i./hm~2)组合对田间禾本科杂草、阔叶类杂草和莎草科杂草的防治效果最好，处理后50 d其总株防效和总鲜重防效分别为83.24%～90.36%和86.12%～88.30%，显著优于两种单剂的防效，大豆和玉米分别增产17.43%～20.17%和19.09%～21.17%。因此，建议将砜吡草唑与嗪草酮混剂作为大豆玉米复合种植区播后苗前封闭除草的轮换除草剂。更多还原

【Abstract】 In order to identify effective pre-emergence herbicides for weed control in soybean-maize composite planting systems, a soil-applied pre-emergence spray treatment was conducted to evaluate the weed control efficacy and crop safety of pyroxasulfone mixed with metribuzin in soybean-maize strip composite planting fields. Field trial results showed that the tank-mix combinations of pyroxasulfone and metribuzin exhibited excellent weed control efficacy and were safe for both soybeans and maize. Among the different mix combinations of 40% pyroxasulfone SC + 480 g/L metribuzin SC, the medium application rate(165 + 414 g a.i./hm~2) and the high application rate(180 + 432 g a.i./hm~2) provided the best control of grass weeds, broadleaf weeds, and sedge weeds in the field. At 50 days after treatment, the total plant control efficacy and total fresh weight control efficacy reached 83.24%～90.36% and 86.12%～88.30%, respectively, significantly outperforming the two herbicides applied alone. Soybean and maize yields increased by 17.43%～20.17% and19.09%～21.17%, respectively. Therefore, the mixture of pyroxasulfone and metribuzin is recommended as a rotational pre-emergence herbicide for weed control in soybean-maize composite planting areas.更多还原