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北海道道有林经营,现在明显地进入了一个转变时期。自1952年开始,推进改造低质林分的皆伐作业,大力进行了人工造林。至1981年末,造林面积己达122,000公顷,相当于施业地面积的四分之一,为人工林计划面积129,000公顷的95%。作为生产基础之一的林道网总长达11,704公里,整个经营面积平均公顷密度为19米。由于对择伐等的天然林施业地进行林相整理的结果,林分进入了返老还青阶段。
Hokkaido Road forest management, and now clearly entered a period of change. Since 1952, it has been promoting clear-cut operations for transforming low-quality forests and vigorously carried out afforestation. By the end of 1981, the area of afforestation had reached 122,000 hectares, equivalent to one-fourth of the area of the land for construction and 95% of 129,000 hectares planned for the plantation. The forest network, which is one of the foundations for production, has a total length of 11,704 kilometers and an average hectare density of 19 meters throughout the area under management. Due to the selection of natural forests and other natural forest land consolidation results, the forest has entered the rejuvenation stage.