落叶松育苗地化学除草技术研究

Technology of Weeding with Chemical Methodin Nursery Garden of Larix gmelini (Rupr.) Rupr.

1998 -1 999年在林西县南门外林场落叶松育苗地进行了 4 4个小区的化学除草试验 ,结果表明 :除草醚、割地草、施田补药液商品用量分别是 2 5 0 g/667m2 、2 0 ml/667m2 和 5 0 ml/667m2 。用药时间分别是播后 2 4 h内和 6月下旬或 7月上旬。除草效果 70 %～ 80 % ,每 667m2 节约费用 32 5元。

From 1998 to 1999, tests on chemical weeding in nursery garden of Larix gmelini (Rupr.) Rupr. have been done in 44 plots in Nanmenwai forest farm. The results show the commercial amount of Chucaomi, Gedicao and Shitianbu are separately 250g/667m 2, 20ml/667m 2 and 50ml/667m 2. The time for using medicine is within 24 hours after sowing, the last tenday of June or first tenday of July. 70 ~ 80 percent of weed can be removed. 325 yuan can be saved for per 667m 2.