西藏主要天然林树种单木材积生长率模型  

Volume growth rate models of the main natural forest tree species in Tibet

作　　者：马炜[1] 陈丽聪 王雪军[1] 黄国胜[1] MA Wei;CHEN Licong;WANG Xuejun;HUANG Guosheng(Academy of Forest Inventory and Planning, State Forestry Administration, Beijing 100714, China;Zhonglin Tianhe Forest Certification Center （ZTFC）, Beijing 100714, China)

机构地区：[1]国家林业局调查规划设计院,北京100714 [2]中林天合(北京)森林认证中心有限公司,北京100714

出　　处：《中南林业科技大学学报》2018年第4期40-45,共6页Journal of Central South University of Forestry & Technology

基　　金：国家林业局项目"全国森林生物量调查建模技术指导与模型建立"专题"基于森林清查资料的中国森林固碳潜力研究"(2014-2-11);林业公益行业科研专项"我国主要林区林地立地质量和生产力评价研究"(20150430302)

摘　　要：基于西藏地区第6和7两期全国森林资源清查的数据,利用择优方法,在4种候选模型中,选择冷杉、云杉与柏木3种主要天然林树种的最佳单木材积生长率模型,结果表明:(1)冷杉、云杉与柏木3种树种的材积生长率均随胸径增大而逐渐减小,并趋近于0,呈现明显反"J"型关系;(2)冷杉和云杉的最佳模型为Y=a*exp(b*D)+c/D,Y=a*Db+c适用于柏木,3种树种单木材积生长率最佳模型的拟合效果良好;(3)冷杉、柏木、云杉在小胸径时的材积生长率依次变小,柏木在胸径<15 cm时,材积生长率随胸径的增大急剧减小,在胸径>15 cm时,减小速度逐渐变缓。本研究建立了冷杉、云杉与柏木3种西藏地区天然林主要树种的合理单木材积生长率模型,编制了"单木材积生长率表",为天然林材积生长率及森林资源的生长和经营管理奠定了理论基础。Based on continuous forest inventory data of Tibet, we built 4 different types of volume-growth rate models, and selected the optimal ones for the main natural forest tree species as Abies fabri（Mast.）Craib, Picea asperata Mast and Cupressus funebris. Results showed that： 1） for the 3 different tree species, the volume-growth rates showed a reversed ＂J＂curve growth trend clearly with increasing diameter. 2） The Y=a＊exp（b＊D）＋c/D model was suitable for Abies fabri（Mast.）Craib and Cupressus funebris. The Y= a＊Db＋cmodel was suitable for Picea asperata Mast. 3） Specially for Cupressus funebris natural forest when the diameter less than 15 cm, the volume-growth rate decreased sharply with increasing diameter, but that decreased slowly in other cases. With small diameter, the volume-growth rates followed by natural forests of Abies fabri（Mast.） Craib, Cupressus funebris and Picea asperata Mast. This study fitted reasonable volume growth rate models table and establish basis for estimating volume growth rate of natural forest and forest management in Tibet.

关 键 词：一类清查 样木 天然林 单木材积 生长率模型 

分 类 号：S757.2[农业科学—森林经理学]