小陇山龙门林场森林资源动态变化分析

Dynamic Changes of Forest Resources in Longmen Farm of Xiaolongshan Forest

依据甘肃省小陇山林业实验局龙门林场1994和2008年二类调查(森林资源规划设计调查)数据,从森林资源各类土地面积、蓄积量、组成结构等方面分析了该林场14年间森林资源消长变化规律,并对变化的原因进行了分析。结果表明:龙门林场有林地、宜林地、未成林地、苗圃地等地类面积呈增加趋势;灌木林地、疏林地、无林地等地类面积呈减少趋势;从蓄积量来看,活立木蓄积量持续上升,生长量大于消耗量。人工林的面积增长较快,以落叶松林为主,未成林造林地则为针叶、阔叶和针阔混交;从林龄结构上来看,中龄林增长较快。

The article analyzed the reason and change rule based on the forest resource inventory data in- eluding the land area of all kinds＇ forest resources, volume, and structure for management in 1994 and 2008 by Longmen farm of Xiaolongshan forestry experimental bureau. The result showed that, the areas of forest land, suitable for forestry land, immature plantation, and nursery in Longmen farm are growing; the areas of shrub land, open woodland and non forest land are decreasing; from the forest volume, stocking volume continues to rising, the growth is more than consumption. Plantation area was rapidly growth and mainly larch forest, immature plantation was mainly pine-broadleaf mixed forest; from the point of forest age structure, mid-maturation forest is growing rapidly.