论文部分内容阅读
黑龙江省五营林业局建于1957年,由于29年来对森林的开采利用,共采林地7.5万公顷,其中皆伐1.6万公顷,消耗立木蓄积700万立米(生长量的2.6倍),生产木材1100万立米。截止1985年末,全局尚有林地面积6.24万公顷,立木蓄积655万立米,其中可采的成熟林为83.5万立米,且多生长在高坡、石塘,生产作业极为困难。1958～1985年营造的人工林,也因经营不当等原因,虽累计造林51万亩,而成林的只有15万亩,仅占造林总量的35%。
Heilongjiang Province Wuying Forestry Bureau was built in 1957, due to the exploitation of forests for 29 years, a total of 75,000 hectares of forests were planted, of which 16,000 hectares are cut, the consumption of 7,000,000 cubic meters of accumulated stumpage (2.6 times the growth rate), the production of wood 11 million cubic meters. As of the end of 1985, there were 62,400 hectares of forest land in the whole world, standing 6.55 million cubic meters of standing tree, of which 835,000 cubic meters were recoverable mature forests. It was extremely difficult to grow more in high slopes and stone ponds. Although the plantation forests constructed from 1958 to 1985 were also improperly managed, 51,000 mu of afforestation was accumulated and only 150,000 mu of forests were planted, accounting for only 35% of the total afforestation.