Seedlings nursery of Larix olgensis( S1-0 ) were taken as objects to conduct weed control test by useing oxyfluorfen,sethoxydim and a certain weight of water , according to four kinds of different proportion of liquid . The results showed that the best effect before sprout was "A35 ml+B40 ml+C";considering the seedling vic-timization rate and percentage of weed control , "A30 ml+B40 ml+C"was the best effect during seedling stage .The work efficiency of chemical herbicide was 5 times more than manual work weed control , and it could save production costs 1 120 Yuan per 667 m2 .%以长白落叶松播种苗（ S1-0）圃地为对象，采用果尔、拿扑净和一定重量的水按4种不同配比的药液进行除草试验，结果表明：芽前杀草效果以“A35 ml＋B40 ml＋C”为最好，苗期喷施效果考虑幼苗受害率和杀草率，以“A30 ml＋B40 ml＋C”效果最佳。采用化学药剂除草较人工除草可提高工效5倍，除草667 m2可节约生产成本1120元。
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