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在卡累利亚苏维埃社会主义自治共和国进行集中皆伐已有三十多年的历史。这种采伐方式符合于采运企业部门的利益,因为它为采运作业的全盘机械化创造了条件,从而也为提高劳动生产率创造了条件。但是,针叶林在皆伐后常常是以山杨、桦树和赤杨更新,而针叶树的数量则很少。这些阔叶树种的利用价值比针叶树种小得多。在好的肥沃的土壤上以阔
It has been more than thirty years since it was concentrated in the Karelian Soviet Autonomous Soviet Republic. This method of harvesting is in the interest of the business unit of the extraction and transportation business as it creates the conditions for overall mechanization of the operations and thus the conditions for increased labor productivity. However, conifers are often refreshed with aspen, birch and alder after clear-cut, while the number of conifers is small. The use value of these broad-leaved species is much smaller than conifers. In good fertile soil to wide