[Objective] The aim was to study technical measures of closed weeding at spikelet stage combined with chemical wedding at exhibi-tion leaf stage.[Method] Gramineous and broad-leaved weeds were controlled by different combinations of 23.5% Guoer,99% Jiujiuhong and 22% Chuheling at spikelet stage and exhibition leaf stage .[ Result] Through the experiment and combining production cost ,the herbicide formu-lation at spikelet stage was 20 mL 23.5%Guoer+25 mL 99%Jiujiuhong+40 L water,and the herbicide formulation at exhibition leaf stage was 35 mL 23.5% Guoer+15 mL 22% Chuheling+40 L water.The percentage of weeding for the two combinations were 85%-90%,which could save 70% of cost.[Conclusion] The results provide reference for production and business operation of poplar nursery.%[目的]探究插穗发芽期封闭除草结合展叶期化学除草的技术措施.[方法]在杨树插穗发芽期和插穗展叶期采用23.5%果尔、99%九九红、22%除禾灵不同组合配方防除禾本科和阔叶杂草.[结果]经过试验并结合生产成本,确定插穗发芽期的除草剂配方为20 mL 23.5%果尔+25 mL 99%九九红+40 L水;插穗展叶期的除草剂配方为35 mL 23.5%果尔+15 mL 22%除禾灵+40 L水.该2种除草方式结合使用除草率在85%~90%,节约成本70%.[结论]试验结果为杨树苗圃生产经营提供技术支撑.
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