杨桦次生林间伐后林下光照特征研究  

Understory Light Features of Polar-Birch Secondary Forest after Thinning

作　　者：刘桂红 李爽 

机构地区：[1]塞罕坝机械林场总场北曼甸林场,河北承德068457

出　　处：《安徽农学通报》2017年第12期117-120,共4页Anhui Agricultural Science Bulletin

摘　　要：该研究通过对河北省承德市桃山林场杨桦次生林间伐后林下光照特征的测量调查,研究了间伐后林下光照特征与抚育间伐强度关系,结果表明:抚育间伐对于杨桦次生林林下光照有明显的增加效果。随着抚育间伐强度的增加,林下光照呈正相关性,但当抚育间伐强度过高时,该相关性不明显。在抚育间伐后的杨桦次生林地内,较强抚育间伐强度的林下光照异质性较为明显。多样性指数的变化主要取决于物种丰富度。Through the survey of light features of polar-birch secondary forest after thinning in Taoshan forest farmof Chengde City of Hebei Province, this paper studied the relationship between light characteristics and thinning in-tensity. The results showed that thinning for birch secondary forest light has a significant increase. With the increaseof thinning intensity, understory light was positively correlated, but when the thinning intensity is high, the correla-tion is not obvious. In polar-birch secondary forest after thinning, light heterogeneity is more obvious with strongerthinning intensity. The diversity index varies mainly depending on species richness.

关 键 词：抚育间伐 杨桦次生林 林下光照 间伐强度 

分 类 号：S79[农业科学—林木遗传育种]