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在地势较陡、石子较多和杂灌丛生的地区,造林前的整地常用下列几种除莠剂: 1.合成生长调节剂主要成分为2,4-D(2,4-二氯苯氧醋酸)、2,4,5-T(2,4,5-三氯苯氧醋酸)和2甲4氯丙酸(MCPP,Meco-prop)。其制剂大多为水乳剂(通常每公顷2-4公斤),用喷雾方法喷于叶上;有时也把上述主要成分溶于油中,施于茎的基部。通常使用背负式喷雾器;有时使用马达喷雾器或飞机。
In the steep terrain, more stones and miscellaneous shrub areas, the following site preparation before planting herbicides commonly used: 1. The main components of synthetic growth regulators are 2,4-D (2,4- dichlorophenoxy Acetic acid), 2,4,5-T (2,4,5-trichlorophenoxyacetic acid) and MCPA (MCPP, Meco-prop). The preparation is mostly in the form of an aqueous emulsion (usually 2-4 kg per hectare) sprayed onto the leaves by spraying; sometimes the above major ingredients are dissolved in oil and applied to the base of the stem. Knapsack sprayer is commonly used; sometimes a motor sprayer or airplane is used.