我场从1954年开始种植杉木用材林,到1963年以后,幼林逐步转入郁闭,形成了森林群体。但随着林龄增长,林木竞争和分化程度也不断加剧,影响生长。因此,由1965年起,我场转入了大面积杉林抚育间伐工作。至1972年止,全场七万多亩杉林中,已完成1—2次间伐的部份林分,又开始了第三次间伐。 My field began to plant fir timber in 1954, and after 1963, the young forest gradually became closed and formed a forest group. However, as the ages grow, the degree of competition and differentiation of trees is also increasing, affecting growth. Therefore, from 1965 onwards, I transferred a large area of ​​fir forest tending and thinning work. By 1972, more than 70,000 acres of cedar forest in the audience had completed 1-2 times of thinning of some of the stands and started the third thinning.