为解决甘南州青稞田杂草滋生的问题，验证除草剂组合5%唑啉草酯乳油+20%苯磺隆可湿性粉剂在青稞田的使用效果和使用剂量，采用裂区设计，5%唑啉草酯乳油和20%苯磺隆可湿性粉剂均分别设3个用量水平，进行了2种除草剂不同剂量配比筛选试验。结果表明，5%唑啉草酯乳油1 500 mL/hm2+20%苯磺隆可湿性粉剂75.0 g/hm2兑水450 kg处理不仅对青稞田安全无药害，而且对青稞田野燕麦和阔叶杂草防除效果好，药后25 d株防效分别达到92.22%、91.87%，药后60 d鲜重防效分别达94.76%、92.33%。同时该处理的折合产量最高，为5 450 kg/hm2，较空白对照(不施用除草剂)增产32.28%。综合考虑认为，5%唑啉草酯乳油1 500 mL/hm2+20%苯磺隆可湿性粉剂75.0 g/hm2为甘南州青稞田防除野燕麦和阔叶杂草的最优除草剂组合。

To address the weed abundance in highland barley fields in Gannan Autonomous Prefecture, this study was conducted to verify the application effect and dosage on highland barley in high altitude areas using the combination of 5% zolyl ester EC plus 20% tribenuron methyl wettable powder. Split plot was design was applied with 3 levels of dilution water amount and two dosages of herbicides, respectively. The results showed that the control effect of 5% oxazolin axetil EC 1 500 mL/ha plus 20% tribenuron methyl wettable powder 75 g/ha diluted with 450 kg water was the best, this treatment showed no harm on highland barley and was effective on wild oats and broad-leaved weeds in highland barley fields, control effect in number of weed plants after 25 days reached 92.22% and 91.87%, respectively, control effect in weed fresh weight after 60 days reached 94.76% and 92.33%,respectively, whereas the yield was the highest in this treatment, 5 450 kg/ha, which was 32.28% higher compared with that of the control(no herbicide applied). In conclusion, 5% oxazolin axetil EC 1 500 mL/ha plus 20% tribenuron methyl wettable powder 75 g/ha was considered as the best herbicide combination for highland barley field in control of wild oats and broad-leaved weeds in Gannan Autonomous Prefecture.

S512.3

2019年民生科技专项 — 东西部扶贫专题协作项目(19CX2NP009)。