小兴安岭阔叶红松林粗木质残体基础特征
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第46卷第4期2010年4月
林
业科
学
SCIENTIA
SILVAE
SINICAE
Vol.46,No.4Apr.,2010
小兴安岭阔叶红松林粗木质残体基础特征
*
刘妍妍
金光泽
(东北林业大学林学院
哈尔滨150040)
摘要:以小兴安岭典型阔叶红松林大面积固定样地(9hm 2
)为对象,分析粗木质残体(CWD )的物种组成及数
量特征、径级结构、存在形式、腐烂等级,揭示小兴安岭阔叶红松林CWD 的基础特征。结果表明:9hm 2
典型阔叶
红松林固定样地内共计有胸径≥2cm 的CWD 3418株(由于高度腐烂鉴别不出种的CWD 有864株,
占总个体数的25.3%),CWD 的密度、胸高断面积和体积分别为380株·hm -2、15.80m 2·hm -2和90.1m 3·hm -2;花楷槭和枫桦是阔叶CWD 的主要组成树种,
红松和冷杉是针叶CWD 的主要组成树种;针叶树种的胸高断面积(9.12m 2·hm -2
)和体积(57.68m 3·hm -2
)分别达到总体CWD 的57.7%和64%;在各存在形式下不同种的CWD 数量随着径级的增
加而减少,均呈反J 型;除未知种以外,其他CWD 都主要以枯立木、干基折断和干中折断形式存在;针叶树种根桩形式CWD 的数量随着径级的增加而增加,
这一规律有别于其他种;样地内各树种CWD 腐烂等级都大致呈正态分布,
主要集中在Ⅱ和Ⅲ腐烂等级上;除针叶树种的Ⅴ腐烂等级外,各树种不同腐烂等级CWD 的数量都随着径级的增加呈减少的趋势。关键词:
阔叶红松林;粗木质残体;存在形式;腐烂等级;小兴安岭
中图分类号:Q148
文献标识码:A
文章编号:1001-7488(2010)04-0008-07
收稿日期:2009-02-13。
基金项目:国家自然科学基金资助项目(30770350);黑龙江省自然科学基金重点项目(ZJN0706);中央高校基本科研业务费专项资金资助(DL09CA02)。
*金光泽为通讯作者。
Character of Coarse Woody Debris in a Mixed Broad-Leaved Korean
Pine Forest in Xiaoxing ’an Mountains ,China
Liu Yanyan
Jin Guangze
(Forestry College of Northeast Forestry University
Harbin 150040)
Abstract :The species composition ,DBH (diameter at breast height )class ,existing form ,decay class of coarse woody
debris (CWD )were studied in a large permanent plot (9hm 2
)of a typical mixed broad-leaved korean pine forest in Xiaoxing ’
an Mountains.All CWDs with DBH ≥2cm were tagged ,mapped ,measured (girth )with species identified.Important findings :a total of 3418CWD individuals with DBH ≥2cm were recorded in the 9hm 2
plot among which the species of 864CWD individuals were not able to be identified due to serious decay ,accounted for 25.3%of the total samples recorded.The CWD density ,basal area and volume were 380indivadual ·hm -2
,15.80m 2·hm
-2
and 90.1
m 3
·hm
-2
,respectively.Acer ukurunduense and Betula costata were the major broad-leaved tree species while Pinus
koraiensis and Abies nephrolepis were the major coniferous tree species.The basal area (9.12m 2
·hm -2
)and volume
(57.68m 3
·hm
-2
)of CWDs from coniferous tree species accounted for 57.7%and 64%of the total basal area and
volume ,respectively.The density of different types of CWDs decreased as increase of DBH class ,and followed the inverse J-shape.The CWD existing forms was mainly composed of standing die ,breakage at rootstock and breakage at trunk.Density of conifer stump CWDs increased with the DBH class.The decay classes of CWD followed normal distribution with a focus of decay class Ⅱand Ⅲ,suggesting that the input and output of CWD was largely balanced in the mixed broad-leaved korean pine forest.Except the CWD of coniferous tree species with decay class V ,the decay class of the rest of CWDs decreased with increase of DBH class.Key words :
mixed broad-leaved korean pine forest ;coarse woody debris ;exiting types ;decay class ;
Xiaoxing ’an Mountains
林分组成成分的生长和死亡都是森林生态系统
动态过程的重要特征。树木死亡后留下的粗木质残