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红松侧枝粗壮且不易自然脱落,要提高林木的产量和质量,必须进行人工修枝。为此于1986年始对14、22年生红松人工林进行修枝技术的研究。通过标准地观测结果分析表明,修枝强度大不利于其生长,而修去2轮濒死枝对胸径和树高生长无不良影响,且可提高特级原木出材率21.8％,纯增益可达20％;修枝能明显改善林内环境及营养条件,修落鲜叶中氮、磷元素,在30个月时有63.7％和81.7％归还土壤,并能促进林内枯叶分解。通过对适宜活枝轮数模拟,制订出14、15、16立地指数级14～47龄红松人工林修枝林龄、间隔期及轮数,可供生产中参考。
Korean pine colony thick and not easy to fall off naturally, to improve the yield and quality of trees, artificial pruning. To this end in 1986, 14, 22 year old pine plantations were pruned technology research. The result of standard observation shows that pruning strength is not conducive to its growth, while repairing 2 dying branches has no adverse effect on DBH and tree height growth, and can increase the yield of premium grade wood by 21.8% 20%; pruning can significantly improve the environment and nutrient conditions in the forest, repair the fresh leaves of nitrogen and phosphorus, at 30 months, 63.7% and 81.7% returned to the soil, and can promote the decomposition of dead leaves in the forest. Through the simulation of the number of suitable shoots, the age, interval and number of branches of the 14 ~ 47-year-old Korean pine plantations with 14 ~ 47 sites were established for reference.