摘要
利用第七次全国森林资源二类调查数据,通过不同地位级、郁闭度、林种的面积和蓄积按龄组和龄级的分布,对土默特右旗的年龄结构进行具体分析,使其发挥更大的效益和作用。主要成果有:(1)从整体分析来看,Va地位级在Ⅰ、Ⅱ龄级占有的面积极少,可能说明环境差,树种存活率低。(2)在每个龄级中随着郁闭度的增加森林蓄积几乎都是由小变大再减小的情况,在郁闭度为0.6左右时蓄积达到最大值然后再变小。(3)防护林在幼龄林面积比例较大,这并不能达到很好的防护效能。薪炭林过熟林比例极大,应该及时采伐更新加工利用。
Based on the data of the second national forest resources survey, the age structure of the Tuyou Banner was analyzed by the different status, canopy closure, area and stock of forest species according to age and age distribution. Its play a greater benefit and role. The main results are as follows：（1） From the overall analysis, The proportion of forest areaof age-class of Ⅰ and II is very small in site class index of Va. This shows that the ground conditions are relatively poor and survival rate of tree species is low.（2） In each age group, as the canopy density increases, the forest accumulation is almost reduced from small to large, and when the canopy density is about 0.6, it reaches the maximum and then becomes smaller.（3）The young forest area is big in the protection forest, This can＇t achieve good protection function. Firewood forest has a large proportion of cooked forest, should be timely harvesting update,processing and utilization.
作者
刘春青
张韬
华佳文
汪超
LIU Chunqing;ZHANG Tao;HUA Jiawen;WANG Chao(Inner Mongolia Agricultural University, Forestry College, Hohhot 010010, China)
出处
《山东林业科技》
2018年第2期54-56,共3页
Journal of Shandong Forestry Science and Technology
关键词
年龄结构
龄级
二类调查
土默特右旗
age distribution
age-class
second class investigation
Tuyou Banner
