造林地清理是营造人工林的关键。化学除草清理造林地 ,能彻底解除各种为害杂草、灌木 ,改良造林地卫生状况 ,为挖穴造林创造条件 ,是不“炼山”造林的新工艺。“炼山”对造林成活率具有明显的提高效应 ,原因是减少了为害杂草、灌木对幼树争夺空间、水分和养分。但“炼山”对水 Afforestation land clearing is the key to creating plantation. Chemical weeding clearing afforestation land, can completely relieve various weeds, shrubs, improve the health of afforestation land, create conditions for digging for afforestation, is not “refining” afforestation new technology. “Lian Shan” on the survival rate of afforestation has a significant improvement effect, reducing the damage weeds, shrubs for young trees for space, water and nutrients. But “Lian Shan” on the water