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The Distribution of Main Coniferous Resource in Beijing Non-Commercial Forest

机译：北京非商品林主要针叶林资源的分布

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摘要

Chinese pine, Oriental Arborvitae and North China Larch are common conifer species, they are widely distributed, and becoming an important category forest resources in Beijing. This paper through the data collection, has made the preliminary statistics to the distribution of main Coniferous forest in Beijing, finally discovered that the whole city altogether has coniferous forest 176784.1354 ha, and Oriental Arborvitae is 87528.1587 ha, Chinese Pine is 79345.5380 ha, North China Larch is 9910.4387 ha, Altogether the accumulation of coniferous forest is 3015127.4 m3, and Oriental Arborvitae is 685071.3m3, Chinese Pine is 1935894.2 m3, North China Larch is 394161.9 m3. They mainly distributes in Miyun, Yanqing and so on 8 counties. Miyun, Yanqing, Huairou, Fang shan, Mentougou, Changping, the Pinggu and Haidian counties are the main distribution areas in Beijing, and the distribution of other country are very few. The stand structure of Beijing conifer forest is illogicality, too much plantation forest in area, but little in natural forest, and the strong density make the forest self-thinning.
机译：松树，东方侧柏和华北落叶松是常见的针叶树种，分布广泛，成为北京重要的森林资源类别。本文通过数据收集，对北京主要针叶林的分布情况进行了初步统计，最终发现全市共有针叶林176784.1354公顷，东方侧柏为87528.1587公顷，松树为79345.5380公顷，华北落叶松为9910.4387公顷，针叶林总积累为3015127.4 m3，东方侧柏为685071.3m3，中国松为1935894.2 m3，华北落叶松为394161.9 m3。它们主要分布在密云，延庆等8个县。密云，延庆，怀柔，房山，门头沟，昌平，平谷和海淀县是北京的主要分布地区，而其他国家的分布则很少。北京针叶林的林分结构不合逻辑，面积上的人工林过多，而天然林则很少，而且浓密的密度使森林自稀疏。

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