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油松是我国北方的主要用材树种。延安地区南部的黄龙山、乔山次生林区,有残存的天然油松林80余万亩和解放后营造的人工油松成林30余万亩。为了正确地评定林地质量,给油松抚育间伐和造林规划设计提供科学依据,我们编制了本地区的油松地位指数表。
Chinese pine is the main timber species in northern China. In Huanglong Mountain and Qiaoshan secondary forest areas in the south of Yan’an area, there are over 800,000 mu of natural oil pine forest remaining and more than 300,000 mu of artificial Pinus tabulaeformis forest after liberation. In order to correctly assess the quality of woodland, provide scientific basis for the thinning and afforestation planning and design of Pinus tabulaeformis, we have compiled the Pinus tabulean index table in this area.