随着甘肃省马铃薯产业的快速发展，草害日趋严重，制约了马铃薯产业的高质量发展，为探寻适宜甘肃省高寒二阴区以藜和野荞麦为主要杂草的马铃薯田杂草防治药剂，采用当地主要种植模式单垄黑膜覆盖种植马铃薯，调查了 11%砜嘧·精喹可分散油悬浮剂 900 mL/ hm2、15%砜嘧·烯草酮可分散油悬浮剂 900 mL/hm2、 23.2%砜·喹嗪草酮可分散油悬浮剂 1 275 mL/hm2兑水 450 kg对藜和野荞麦的防治效果及对马铃薯产量的影响。结果表明， 23.2%砜·喹嗪草酮可分散油悬浮剂处理对藜和野荞麦的防治效果最好，药后 30 d时，对藜的株防效为 84.62%、鲜重防效为 93.32%，分别较 15%砜嘧·烯草酮可分散油悬浮剂 900 mL/hm2兑水 450 kg处理增加 4.62、3.79个百分点、较 11%砜嘧·精喹可分散油悬浮剂 900 mL/hm2兑水 450 kg处理分别高 36.63、40.13个百分点。对野荞麦的株防效为 92.32%，鲜重防效为 94.86%，分别较 11%砜嘧·精喹可分散油悬浮剂 900 mL/hm2兑水 450 kg处理分别高 2.86、3.62个百分点，较 15%砜嘧·烯草酮可分散油悬浮剂 900 mL/ hm2兑水 450 kg增加 7.34、7.10个百分点。得益于对杂草的有效控制，成熟期 23.2%砜·喹·嗪草酮可分散油悬浮剂 1 275 mL/hm2兑水 450 kg处理的马铃薯单株产量最高，分别较 15%砜嘧·烯草酮可分散油悬浮剂 900 mL/hm2兑水 450 kg处理、 11%砜嘧·精喹可分散油悬浮剂 900 mL/ hm2兑水 450 kg处理、人工锄草对照和清水对照处理分别增产 7.45%、21.72%、147.45%、285.22%。因此，在以藜和野荞麦为主要杂草的高寒二阴区，建议使用 23.2%砜·喹嗪草酮可分散油悬浮剂 1 275 mL/hm2兑水450 kg防治杂草，以达到良好的防治效果。

With the rapid development of the potato industry in Gansu Province, weed infestation has become increasingly se.rious, restricting the high-quality development of the potato industry. To explore suitable herbicides for controlling weeds dominatedby Chenopodium album and Fagopyrum urophyllum in potato fields in alpine and clandy-humid region of Gansu Province. Potatoeswere planted in the local main planting pattern with single ridges covered by black plastic film. The control effects of 11% rimsulfuron·quizalofop-p-ethyl dispersible oil-based suspension concentrate at a dosage of 900 mL/ha, 15% rimsulfuron·clethodim dispersibleoil-based suspension concentrate at a dosage of 900 mL/ha, and 23.2% rimsulfuron·quizalofop-p-ethyl·metribuzin dispersible oil-based suspension concentrate at a dosage of 1 275 mL/ha (all diluted with 450 kg water) on Chenopodium album and Fagopyrum uro. phyllum as well as their impacts on the potato yield were investigated. Results showed that 23.2% rimsulfuron·quizalofop-p-ethyl·me.tribuzin dispersible oil-based suspension concentrate had the best control effect on Chenopodium album and Fagopyrum urophyllum. At 30 days after spraying herbicides, the plant control efficacy and fresh weight control efficacy against Chenopodium album reached 84.62% and 93.32%, respectively, which were 4.62 and 3.79 percentage points higher than that of 15% rimsulfuron·clethodim dispers.ible oil-based suspension concentrate at a dosage of 900 mL/ha diluted with 450 kg water, respectively, and were also 36.63 and 40.13 percentage points higher than that of 11% rimsulfuron·quizalofop-p-ethyl dispersible oil-based suspension concentrate at adosage of 900 mL/ha diluted with 450 kg water, respectively. For Fagopyrum urophyllum, the plant control efficacy and fresh weightcontrol efficacy reached 92.32% and 94.86%, respectively, which were 2.86 and 3.62 percentage points higher than that of 11% rim.sulfuron·quizalofop-p-ethyl dispersible oil-based suspension concentrate at a dosage of 900 mL/ha diluted with 450 kg water, respec.tively, and were also 7.34 and 7.10 percentage points higher than that of 15% rimsulfuron·clethodim dispersible oil-based suspensionconcentrate at a dosage of 900 mL/ha diluted with 450 kg water, respectively. Due to the effective control of weeds, the yield per plantof treatment with 23.2% rimsulfuron·quizalofop-p-ethyl·metribuzin dispersible oil-based suspension concentrate at a dosage of 1 275mL/ha, diluted with 450 kg water was the highest at the maturity stage, with an increase of 7.45%, 21.72%, 147.45% and 285.22%compared with those in 15% rimsulfuron·clethodim dispersible oil-based suspension concentrate, 11% rimsulfuron·quizalofop-p-ethyl dispersible oil-based suspension concentrate, manual weeding and control with water, respectively. Therefore, in the alpine andcloudy-humid areas where Chenopodium album and Fagopyrum urophyllum are the main weeds, it is recommended to use 23.2% sul.fone·quinclorac·azinapyr mesotrione dispersion oil suspension at a dosage of 1 275 mL per hectare, diluted with 450 kg water to con.trol the weeds, so as to achieve a good control effect.

S451.22；S523

甘肃省创新驱动助力工程项目 (GXH20250325-3)；甘肃省现代农业产业技术体系建设专项 (GSARS-05)；寒旱农业种业攻关项目( ZYGG-2025-4)；国家现代农业产业技术体系( CARS-09-P06)。