威尔伯在幼林抚育中的应用研究

以红松、红皮云杉、长白落叶松造林地为对象,利用化学制剂威尔伯进行幼林抚育试验,结果表明:450 ml·hm-2剂量除草效果最差,仅有12%,在生产上无应用价值;450 ml·hm-2剂量有一定的除草效果,但不明显,持效期也短;1 125 ml·hm-2剂量无论除草效果还是除草速率都优于450 ml·hm-2和750 ml·hm-2。长白落叶松对威尔伯敏感,不能应用。化学除草抚育较人工抚育更能促进幼树生长,而且费用较低。

Application research on velpar in tending of young forest

Planting sites of Pinus koraiensis、Picea koraiensis Nakai、and Larix olgensis Henry were taken as objects to carry out tending experiment of young forest by using chemical agent -velpar , the results showed that under the dosage of 450 ml · hm^-2 , the weed control effects were 12%, was no application value in the production; there is a certain weed control effect under the dosage of 450 ml· hm^-2 ,but was not obvious with short lasting period .The weed control effect and rate under the dosage of 1 125 ml· hm^-2 were better than 450 ml· hm^-2 and 750 ml· hm^-2 .Larix olgensis Henry was too sensitive to apply for velpar .Comparing with artificial tending , chemical weeding tending could promote the growth of young trees with lower cost .