人工更新造林成林的关键,在于能否做到“三分造,七分管”,不误林时的对幼林进行除草、透光等抚育措施。目前,我国国营及群众造林发展很快,但大量的幼林抚育仅靠手工,远远不能适应更新造林事业发展的需要。我们从1978年以来,对人工幼林的化学抚育, The key to reforesting forests by hand is whether we can achieve the “three-point and seven-point control” measures, and weeding the young forests for weeding and light transmission without any mistake. At present, the state-owned enterprises and mass afforestation have developed rapidly. However, a large number of young forest tending rely solely on hand and can not meet the needs of the reforestation project. Since 1978, we have been educating young artificial forestry plants,