迪庆藏族自治州森林资源结构变化分析

Change of Forest-Resource-Structure in Diqing Tibetan Autonomous Prefecture

对迪庆州2006年和2016年森林资源规划设计调查数据进行了分析。结果表明:近10年,有林地面积、灌木林地面积、活立木蓄积、森林覆盖率有所增长;疏林地面积、未成林造林地面积、苗圃地面积、无立木林地面积、宜林地面积大幅度减少,无辅助生产林地。2016年迪庆州林业用地占国土面积的82.6%;活立木蓄积为241 296 530m3;森林覆盖率为75.04%;国有和集体林地占94.1%;天然林占96.6%,其中纯林占85.5%,83.0%以上为针叶林;冷杉是全州的主要优势树种,其蓄积量占47.8%;近成过熟林比例占79.1%,龄组老化,生产力低下。

The data of planning&design survey for forest-resources of Diqing Tibetan Autonomous Prefecture in2006&2016were analyzed.The survey results in2006to2016shows that forest area,shrub forest area,stock volume and forest coverage rate increase.The area of open forest land,non plantation forest land,nursery land,non standing forests land and suitable forest land substantially reduce,no auxiliary production forest land.Forestry land accounts for82.6%of the land area,the growing stock of living wood up to241296530m3,the forest coverage rate is75.04%,the state-owned and collective forestland account for94.1%.Natural forest accounted for96.6%,which pure forest account for85.5%,more than83.0%are coniferous forest.Abies is a dominant species in survey area,whose volume accounts for47.8%.The proportion of near mature forest,mature forest and over mature forest account for79.1%,it shows the characteristics of aging and low productivity.Aiming at the existing problems of ecological forestry in Diqing Prefecture,corresponding suggestions are put forward.