Analysis of Spatial Distribution Characteristics of Trees with Different Diameter Classes in Natural Korean Pine Broad Leaved Forest

XU Hai; HUI Gang-ying; HU Yan-bo; LI Chu-shan; LIN Tian-xi; ZHANG Xian-long; WU Xiang-ju

To further explore the spatial structure pattern of natural Korean pine broad leaved forest and provide references for managing the natural forests,this study established a 1 hm2 plot in Dapo Region of Jiaohe Forestry Experimental Area,using TOPCON-GTS-602AF to survey every tree higher than 1.3 m,and then employing three parameters-angle index,neighborhood comparison and mingling—to analyze the spatial distribution characteristics of trees with different diameter classes in this plot.It showed that the trees with diameter classes smaller than 10 cm accounted to 59.4% of all tress in the forest,with the trees around them distributing in random pattern,similar to the distribution pattern of the whole forest.On the contrary,trees with larger diameter classes had remarkable decreasing angle indices,with the neighboring trees uniformly surrounding them.Neighborhood comparisons decreased with increasing diameter classes,with the small trees being suppressed,the large trees being superior,while the middle trees being in some kind of intermediate or above status.Meanwhile,mingling increased with increasing diameter classes,showing that as their diameter increased,trees would face lessening competitive stress and that the spatial structure of the forest was gradually getting optimized.

1. Research Institute of Forestry, CAF

2. Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China

3. Guizhou Forestry Survey and Planning Institute, Guiyang 550003, Guizhou, China

Received Date: 2006-01-23

Abstract: To further explore the spatial structure pattern of natural Korean pine broad leaved forest and provide references for managing the natural forests,this study established a 1 hm2 plot in Dapo Region of Jiaohe Forestry Experimental Area,using TOPCON-GTS-602AF to survey every tree higher than 1.3 m,and then employing three parameters-angle index,neighborhood comparison and mingling—to analyze the spatial distribution characteristics of trees with different diameter classes in this plot.It showed that the trees with diameter classes smaller than 10 cm accounted to 59.4% of all tress in the forest,with the trees around them distributing in random pattern,similar to the distribution pattern of the whole forest.On the contrary,trees with larger diameter classes had remarkable decreasing angle indices,with the neighboring trees uniformly surrounding them.Neighborhood comparisons decreased with increasing diameter classes,with the small trees being suppressed,the large trees being superior,while the middle trees being in some kind of intermediate or above status.Meanwhile,mingling increased with increasing diameter classes,showing that as their diameter increased,trees would face lessening competitive stress and that the spatial structure of the forest was gradually getting optimized.

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Reference (7)

[1]	惠刚盈,克劳斯?冯佳多. 森林空间结构量化分析方法[M]. 北京:中国科学技术出版社, 2003
[2]	惠刚盈,胡艳波. 混交林树种空间隔离程度表达方式的研究[J].林业科学研究, 2001, 14 (1) : 177～181
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[4]	安慧君. 阔叶红松林空间结构研究[D]. 北京: 北京林业大学, 2003
[5]	胡艳波,惠刚盈,戚继忠,等. 吉林蛟河天然红松阔叶林的空间结构分析[J]. 林业科学研究, 2003, 16 (5) : 523～530
[6]	于政中. 森林经理学[M]. 北京:中国林业出版社, 1993: 50～60
[7]	Garcia A, Irastoza P, Garcia C, et al. Concep ts associated with deriving the balanced distribution of uneven-aged structure from evenaged yield tables: App lication to Pinus sylvestris in the centralmountains of Spain[A]. In: Olssthoorn FM, Bartelink H H, Gardiner J J, et al. Management of mixed-species forest: silvicultureand economics[C]. Dlo Institute for Forestry and Nature Research(IBN₂DLO) , Wageningen, 1999: 109～127

[1]	惠刚盈,克劳斯?冯佳多. 森林空间结构量化分析方法[M]. 北京:中国科学技术出版社, 2003
[2]	惠刚盈,胡艳波. 混交林树种空间隔离程度表达方式的研究[J].林业科学研究, 2001, 14 (1) : 177～181
[3]	Hui G Y, v Gadow K. DasWinkelmass2Theoretische Bberlegungenzum op timalen Standardwinkel [J]. Allgemeine Forst u. Jagdzeitung, 2002, 173 (9) : 173～177
[4]	安慧君. 阔叶红松林空间结构研究[D]. 北京: 北京林业大学, 2003
[5]	胡艳波,惠刚盈,戚继忠,等. 吉林蛟河天然红松阔叶林的空间结构分析[J]. 林业科学研究, 2003, 16 (5) : 523～530
[6]	于政中. 森林经理学[M]. 北京:中国林业出版社, 1993: 50～60
[7]	Garcia A, Irastoza P, Garcia C, et al. Concep ts associated with deriving the balanced distribution of uneven-aged structure from evenaged yield tables: App lication to Pinus sylvestris in the centralmountains of Spain[A]. In: Olssthoorn FM, Bartelink H H, Gardiner J J, et al. Management of mixed-species forest: silvicultureand economics[C]. Dlo Institute for Forestry and Nature Research(IBN₂DLO) , Wageningen, 1999: 109～127

Analysis of Spatial Distribution Characteristics of Trees with Different Diameter Classes in Natural Korean Pine Broad Leaved Forest

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