论文部分内容阅读
日本落叶松(Larix kaempferi)、长白落叶松(Larix olgensis)、红松(Pinus koraiensis)3个树种均为人们非常喜爱的用材速生树种。它们适应范围广、抗病能力强、生长迅速、干形通直、材质优良。该3个树种在以林为主的清原县,1989年统计,面积达1006323亩,占全县人工林总面积的83.4%;蓄积6406524m~3,占全县人工林总蓄积的88.5%。为掌握这些森林资源的消长变化,就是需对它们过去的采伐量、误伐量、盗伐量进行调查估测.
Larix kaempferi, Larix olgensis, and Pinus koraiensis are the most popular tree species in China. They adapt to a wide range of resistance to disease, rapid growth, stem straight, good material. The three species in the forest-based Qingyuan County, 1989 statistics, an area of 1006323 acres, accounting for 83.4% of the total area of plantations in the county; accumulation of 6406524m ~ 3, accounting for 88.5% of the total reserves of plantations in the county. In order to grasp the changes of the growth and decline of these forest resources, we need to conduct an investigation and estimation of the past harvests, miscuttings and illegal cuts.