【摘要】 为解决复种马铃薯田间次生油菜、次生小麦及杂草对马铃薯的危害，筛选高效安全的除草剂及施药模式。除草剂在播种后第3天喷施，茎叶除草剂在马铃薯植株8～10 cm后喷施，采用随机区组设计进行田间药效试验。除草剂施用70%嗪草酮WP 30 g/667 m~2+10.8%精喹禾灵EC 30 mL/667 m~2+33%二甲戊灵EC 35 mL/667 m~2,施药后25 d对次生油菜等阔叶杂草的防效达84.61%,对次生小麦等禾本科杂草的防效达69.69%;茎叶除草剂施用3%砜嘧磺隆WP 33 g/667 m~2+12%烯草酮EC 30 mL/667 m~2效果最佳，施药后15 d对次生油菜等阔叶杂草的防效达84.36%,对次生小麦等禾本科杂草的防效达86.86%;2种处理在规范使用剂量下对马铃薯安全。复种马铃薯土壤封闭除草剂推荐选用70%嗪草酮WP+10.8%精喹禾灵EC+33%二甲戊灵EC,在马铃薯播种后3～5 d于地表面喷施；茎叶除草剂推荐选用3%砜嘧磺隆WP+12%烯草酮EC,在马铃薯苗后8～10 cm、杂草3～4叶期喷施。更多还原

【Abstract】 We selected the efficient and selective herbicides and application modes to eliminate the damage of secondary rape seed,secondary wheat and weeds to potato in the multiple cropping field.The pre-emergence herbicides were sprayed on the 3rd day after sowing,and the post-emergence herbicides were sprayed after the potato plant of 8～10 cm.The efficacy test was conducted using a randomized block design in the field.The pre-emergence herbicides,metribuzin 70% WP at 30 g/667 m~2+quizalofop-p-ethyl 10.8% EC at 30 mL/667 m~2+pendimethalin 33% EC at35 mL/667 m~2,had control effects of 84.61% on broadleaf weeds such as secondary rape and 69.69 % on gramineous weeds such as secondary wheat after 25 days of application.The post-emergence herbicides,rimsulfuron 3% WP at33 g/667 m~2+clethodim 12% EC at 30 mL/667 m~2,had the best application effect.After 15 days of application,the control effect on broadleaf weeds such as secondary rape reached 84.36%,and the control effect on gramineous weeds such as secondary wheat reached 86.86%.Both the two herbicides were selective to potatoes at regulated doses.the pre-emergence herbicides were recommended to use metribuzin 70% WP+quizalofop-p-ethyl 10.8% EC+pendimethalin 33% EC sprayed on the ground surface at 3-5 days after sowing.The recommended post-emergence herbicides were rimsulfuron 3% WP+clethodim 12% EC sprayed after the potato plant of 8～10 cm and the 3～4leaves stage of weeds.更多还原