实践证明,及时进行幼林抚育,是提高造林成活率,促进树木成林的主要措施。造林成活后的头几年,幼苗枝叶小,不能抑制丛生的杂草,特别是新栽的针叶树,如落叶松、油松等树种,二三年内生长缓慢,如不及时清除杂草,会严重影响幼树生长。因此,适时松土、除草才能促进幼树生长。卓资县城关公社河南大队林场,1977年秋季在梯田地栽的落叶松,第二年夏天 Practice has proved that timely tending of young forests is the main measure to increase the survival rate of afforestation and promote the success of trees. In the first few years after afforestation survived, young seedlings could not inhibit weeds, especially newly planted conifers such as larch and pine trees. They grew slowly in two or three years and would be severely damaged if weeds were not cleared in time Affect young tree growth. Therefore, timely loosening, weeding can promote young tree growth. Zhuozi County Chengguan commune Henan team farm, autumn 1977 planted in terraced larches, the second summer