论文部分内容阅读
在黄杨 (Buxussinica)苗圃中施用 1 0个配方的除草剂 ,筛选出 3个较理想配方B、BD、BH ,除草效果分别为 :93.2 %、97.5%、97.6%。用这 3个配方的不同浓度分别于 3月上旬、3月下旬、4月中下旬进行除草试验 ,结果表明 :3月下旬用药量较低、效果好、有效控草期长 ;0 .3mL/m2 的BD为最佳配方 ,除草率为 99.5%。化学除草所需费用只占人工除草费用的2 4 .4%～ 32 .84%。
In the Buxussinica nursery, 10 formulations of herbicides were applied to screen three more ideal formulas B, BD and BH. The weeding effects were 93.2%, 97.5% and 97.6% respectively. The herbicides were tested in the early, late March and late April in different concentrations of the three formulations respectively. The results showed that: the dosage was lower in late March, the effect was good and the effective grass control was long; 0.3mL / m2 of BD for the best formula, weeding rate of 99.5%. The cost of chemical weeding only accounts for 24.4% ~ 32.84% of the artificial weeding expenses.