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黑龙江省的乡土杨树有十多种,其中山杨(Populus davidiana Dode)占绝对优势。在全省次生林区均有分布(尤以张广才岭西坡和小兴安岭南坡为多),是黑龙江省森林资源的重要组成部分。次生山杨林一般都是解放后封山育林天然更新起来的。1962年开始抚育,不仅提高了林木质量,促进了生长,同时获得木材近百万立方米。为了科学地经营管理好现有次生杨林,我们在全省次生林调查统计资料的基础上,复
There are more than ten native poplars in Heilongjiang Province, of which Populus davidiana Dode has the absolute advantage. In the secondary forest area throughout the province are distributed (especially in Zhang Guangcai Lingxipo and the southern slope of the Little Xing’an Mountains), is an important part of the forest resources in Heilongjiang Province. Secondary mountain forest are generally closed after the liberation of forest conservation natural renewal. Tending began in 1962, which not only improved the quality of forest trees but also promoted the growth of woods, and at the same time obtained nearly 1 million cubic meters of timber. In order to scientifically manage the existing secondary poplar forest, based on the survey data of the secondary forest in our province,