摘要
在澄江市国家级公益林分布区域布设典型样地,分析研究典型样地内国家级公益林动态。2014年布设国家级公益林典型样地60个,并完成典型样地第一轮监测,2019年开展国家级公益林典型样地第二轮监测。对两期样地监测结果进行对比分析。结果表明,树种结构针叶纯林和针叶相对纯林明显增加,阔叶纯林和阔叶相对纯林逐步减少,树种结构更趋于针叶化;前期(2014年)样地郁闭度超过0.5的林分占75%,本期(2019年)样地郁闭度超过0.5的林分占88.3%,样地内林分密度逐渐提高;样地活立木蓄积量出现增长趋势,活立木总蓄积增长290.31 m3,平均样地蓄积增加4.84 m3;森林生态功能等级逐渐降低,森林生态功能保持在中等级水平。提出对样地内所有立木进行样木位置图绘制,以便于获取枯立木、枯死木及采伐木数量和蓄积等建议。
The typical sample plot was set up in national public welfare forest in Chengjiang City to study the dynamic changes of national public welfare forest.In 2014,60 typical sample plots of national public welfare forests were set up,and the first round of monitoring was completed.In 2019,the second round of monitoring of typical national public welfare forests was launched.The comparative analysis of the results showed that coniferous pure forest and coniferous relative pure forest increased significantly,broad-leaved pure forest and broad-leaved relative pure forest decreased gradually,and the tree species structure tended to be coniferous;the canopy density of the sample plot in the early stage(2014)exceeded 0.5,accounting for 75%,while the canopy density in the current period(2019)exceeded 0.5,accounting for 88.3%,and the stand density gradually increased in the sample plot;the volume of standing trees showed an increasing trend,the total volume of standing trees increased by 290.31 m3,and the average volume of sample plot increased by 4.84 m3;the forest ecological function grade gradually decreased,which remained at the medium level.This paper proposed to draw the location map of all the standing trees in the sample plot,so as to obtain the number and volume of dead standing trees,dead trees and harvested trees.
作者
高兴忠
普顺荣
侯家学
杨海令
期俊程
GAO Xingzhong;PU Shunrong;HOU Jiaxue;YANG hailing;QI Juncheng(Yuxi Bureau of Forestry and Grassland, Yuxi, Yunnan 653100, China;Chengjiang Bureau of Forestry and Grassland, Chengjiang, Yunnan 652500, China)
出处
《林业调查规划》
2022年第3期126-132,共7页
Forest Inventory and Planning
关键词
国家级公益林
典型样地
动态监测
生态功能等级
澄江市
national public welfare forest
typical sample plot
dynamic monitoring
ecological function grade
Chengjiang City
