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油松(Pinus tabulaeformis Carr.)是我国北方分布广、适应性较强的乡土树种,据调查,山西有天然油松林22.6万ha,其中林龄在45年生左右,每公顷蓄积在45m~3以下的低产残次林13.3万ha,集中分布在太行山区。为了充分地开发和利用这些资源,在改造前获得一定的经济效益,我们进行了油松残次林采脂试验研究。一、试验地自然概况试验地选在太行山森林经营局铁桥林场的大西沟作业区,位于东径113°25′,北纬37°32′,海拨1400-1500m,坡度25-35°,油松林平均林龄43年,平均树高8.7m,平均胸径17.4cm;优势树种油松,植被绣线菊、沙棘、胡枝子等;土壤薄-中层褐土。
Pinus tabulaeformis Carr. Is a widely distributed and adaptable native tree species in northern China. According to the survey, there are 226000 ha of natural pine forest in Shanxi, of which the age is about 45 years old and the accumulation per hectare is below 45m 3 The low-yielding secondary forest 133,000 ha, concentrated in the Taihang Mountains. In order to fully exploit and utilize these resources, we have obtained some economic benefits before the transformation, and we conducted the research on the oil recovery of the secondary forest of Pinus tabulaeformis. First, the nature of the experimental site Experimental selection in the Taihang Mountain Forest Management Tieqiao forest Daxigou operating area, located east of 113 ° 25 ’, latitude 37 ° 32’, 1400-1500m altitude, slope 25-35 °, the oil The average age of the pine forest was 43 years with an average height of 8.7 m and an average diameter at breast height of 17.4 cm. The dominant species were Pinus tabulaeformis, vegetation Spiraea, Seabuckthorn and Lespedeza.