岭南藜蒴栲-罗浮柿群系粗木质残体的基本特征  

Character of Coarse Woody Debris in a Castanopsis fissa-Diospyros morrisiana Formation in Lingnan Region,China

作　　者：樊小丽[1] 周光益[1] 赵厚本[1] 邱治军[1] 刘伟新 梁瑞友 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520 [2]韶关市曲江区国营小坑林场,广东韶关512162

出　　处：《林业科学研究》2016年第3期448-454,共7页Forest Research

基　　金：中科院战略性先导科技专项(XDA05050205);国家自然科学基金(31170418);中央级公益性科研院所基本科研业务费专项资金(RITFYWZX201504)

摘　　要：[目的]通过实地调查和采样对粗木质残体(CWD)进行量化研究,来了解未受冰灾干扰的岭南藜蒴栲-罗浮柿群系CWD的本底数据,建立CWD生物量回归方程。[方法]采用样方调查法,分析粤北小坑国家森林公园的常绿阔叶次生林在不同地形下CWD的基础特征及其存在形式、腐解等级和径阶的分布格局。[结果]表明:该林分CWD总贮量为8.25 t·hm^(-2),各腐解等级(1、2、3、4、5)所占比例分别为41.07%、17.75%、13.89%、21.74%、5.55%;CWD主要以倒木和枯立木的形式存在,其次是大枯枝和根桩;径阶结构主要集中在5 10、10 15 cm。[结论]CWD的空间异质性较大,但不同地形下其贮量、蓄积量、覆盖面积和数量差异不显著(p>0.05)。通过423个粗木质残体直径和质量的实测数据建立了CWD不同腐解等级的生物量幂函数回归方程。Objective]In order to understand the basic data and establish biomass regression equation of coarse woody debris（CWD）in a Castanopsis fissa-Diospyros morrisiana formation which was not influenced by ice storm, we carried out field investigation and sampling in Xiaokeng National Park,located in north of Guangdong. [Methods]We analyzed the basic characteristics and existing forms,distribution patterns in decay class and diame-ter of CWD in different landforms by plant plot investigation method.[Results]The results indicated that the total biomass of CWD was 8.25 t·hm^-2,and the biomass in different decay class（1、2、3、4、5）occupied 41.07%, 17.75%,13.89%,21.74%,5.55% respectively in the forest.The CWD was mainly composed of fallen logs and snags,followed by the large branches and stumps.Diameter structure of CWD concentrated in the range of 5 10 cm and 10 15 cm.[Conclusions]The spatial heterogeneity of CWD was high,but there was no significant differ-ence in different landforms.Furthermore,biomass regression equation of CWD in different decay class levels were established by using 423 measured diameter and weight data of CWD.

关 键 词：岭南 藜蒴栲-罗浮柿群系 粗木质残体 生物量方程 

分 类 号：S718.5[农业科学—林学]