摘要
吉林省乾安县退化防护林面积已经占到现有防护林总面积的13%,且呈增长趋势。为扭转防护林衰退的局面,阐述了该县防护林的退化原因和改造措施。
Qian ＇an degradation of shelter forest area has 13% of the total area of into the existing protection forest,There is a growing trend,For reverse shelter forest decline,In this paper,the reasons and modification measures for protection forest degradation.
出处
《林业勘查设计》
2015年第4期91-93,共3页
Forest Investigation Design
关键词
退化防护林
枯死树
濒死树
改造
吉林乾安
The degradation of shelter forest
dead and dying tree
A dying tree
remould
