JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2016, Vol. 40 ›› Issue (06): 76-84.doi: 10.3969/j.issn.1000-2006.2016.06.012

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Characteristics of woody debris in mixed broadleaved-Korean pine forest plot in Fenglin National Nature Reserve in Xiao Hinggan Mountains, China

CHEN Jingyuan1,BI Lianzhu2,SONG Guohua2,ZHANG Wei2,WANG Quanbo2,LIU Yanyan1,JIN Guangze1*   

  1. 1.Center for Ecological Research, Northeast Forestry University, Harbin 150040, China;
    2.Heilongjiang Fenglin National Nature Reserve Authority, Yichun 153033, China
  • Online:2016-12-18 Published:2016-12-18

Abstract: Woody debris(WD), including coarse woody debris(diameter ≥ 10 cm, CWD)and fine woody debris(1 cm ≤ diameter <10 cm, FWD), is one of the most important components in forest ecosystems. This study aimed to understand the species composition, diameter distribution, existing types and decay classes of WD, and their relationships with stand factors in 30 hm2 plot of mixed broadleaved-Korean pine forest in Fenglin National Nature Reserve in Xiao Hinggan Mountains. The total volume of WD with diameter ≥ 1 cm was 104.26 m3/hm2. The volume proportion of FWD to CWD was 0.5:99.5; The diameter distribution of WD density showed typical reverse J-shaped curve, the small size WD(≤ 20 cm)was accounted for 52.9% of the total density. The volume of WD showed nearly J-shaped curve. The volume of Pinus koraiensis increased with increase of the diameter, the other species displayed almost normal distribution. Existing types of WD were mainly composed of trunk segment, uprooted blow-down and breakage at rootstock. As the increasing of diameters, the density and volume percentage of trunk segment decreased, and uprooted blow-down and breakage at rootstock initially increased, then decreased. The decay classes of CWD showed nearly normal distribution curve, peaked at the classes of Ⅲ and Ⅳ. The total density of WD was positively correlated with the total density of living tree(P < 0.05). The total basal area of WD was negatively correlated with total volume, max diameter at breast height(DBH)and mean DBH of living tree(P < 0.05). The total volume of WD was negatively correlated with the total basal area and the total volume of living tree(P < 0.05). On the whole, the density, basal area and volume of classe Ⅲ, Ⅵ, Ⅴ were significantly correlated with the basic parameters of living tree.

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