红松、落叶松以及其它针、阔叶树苗床的莠草防除,许多年来在林业生产上一直是贯用人工除草的方法。这不但要耗费大量人工,使育苗成本增高,而且在除草的同时往往要带走一些幼苗,或使其根部裸露损伤,容易造成缺苗和死苗。 Korean pine, larch and other needles, broad-leaved tree seedbed weeds control, for many years in the forestry has been the production of artificial weeding method. This not only consumes a lot of labor, raising the cost of nursery, but also often takes some seedlings away from the weeds or exposes the roots to nuisance damage, which may lead to lack of seedlings and dead seedlings.