化学除草剂在针叶树育苗中的应用研究

Application of Chemical Herbicides in Seedling-raising of Coniferous Tree

在针叶树育苗中进行不同种类、不同浓度除草剂的应用试验,结果表明:在播后苗前喷施割地草浓度控制在0.23mL·m^(-2)以内,除草效果最好,对苗木无药害。全年使用割地草除草,苗期每次喷施浓度应控制在0.15mL·m^(-2),全年喷施不超过4次,除草效果最好,且对苗木生长无影响。割地草+莠去津全年除草,苗期每次喷施浓度应控制在0.23+0.1mL·m^(-2),全年累计量控制在0.69+0.2mL·m^(-2),除草效果最好,且对苗木生长没有影响。割地草+莠去津混合除草剂除草效果好于单一割地草,且成本比人工除草低78.4%。

The application experiments with different kinds ＆concentrations of herbicides in conifer seedlings were conducted. Result shows that the herbicidal effect of spraying grasses before seeding should be controlled within 0.23 mL· m^-2, and the seedlings were not phytotoxic. The germination grass is weeded all year round. The spra ying concentration should be controlled at 0.15 mL · m^-2at the seedling stage, and the spraying time should not ex teed four times in the whole year. The herbicidal effect is the optimal, and it has no effect on the growth of seed lings. Excised grass ＋ Atrazine is weeded throughout the year. The concentration of spraying at each seedling stage should be controlled at 0.23＋0.1 mL· m^-2. The annual cumulative amount is controlled at 0.69＋0.2 mL·m^-2. The herbicidal effect is optimal, and there is no growth of seedlings. The herbicidal effect of Goal （active ingredi ent： 23.5% Oxyfluorfen Emeulsifible oil） ＋ Atrazine mixed herbicide is optimal than that of single cutting grass, and the cost is 78.4%lower than manual weeding.