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作 者 ：宋文艺;蔡慧颖;金光泽*;李凤日;贾炜玮;崔晓阳

期 刊 ：植物研究 2014年 34卷 5期 页码：619-625

关键词：红松人工林；黑龙江省；地区；碳密度；分配比例；

Keywords:Pinus koraiensis plantations, Heilongjiang Province, regions, carbon density, distribution proportion,

摘 要 ：森林碳密度及其分配格局是探究森林碳循环和全球碳循环的重要内容。本研究采用样地清查和异速生长方程的方法测定黑龙江省不同地区(小兴安岭南坡、张广才岭东坡、张广才岭西坡和完达山)红松人工幼龄林碳密度及其分配特征。结果表明:(1)不同地区红松人工林植被碳库、碎屑碳库差异显著，土壤碳库和总碳库碳密度差异不显著，分别在35.95~76.36、3.52~11.34、101.96~173.37和154.54~256.78 tC·hm^-2波动；各组分分配比例差异显著，分别为18.78%~30.34%、1.79%~5.24%和65.58%~79.43%。(2)不同地区红松人工林乔木层各器官(除树叶)碳密度及其分配均差异显著，干、枝、叶和根的碳密度分别在22.47~47.11、2.30~12.31、2.90~5.80和7.02~17.16 tC·hm^-2波动，各器官分配比例在51.98%~64.80%、6.68%~17.19%、6.55%~8.34%和20.23%~22.55%。(3)不同地区红松人工林根冠比(R/S)、土壤碳密度(含碎屑层碳密度)与植被碳密度比(SC/VC)均差异显著，各地区比值范围分别为0.26~0.29和2.31~4.69。(4)胸高断面积与乔木层碳密度、植被碳库和森林生态系统总碳库皆呈极显著正相关关系(P<0.01)，能够很好地反映其碳密度的动态变化。

Abstract:We explored the importance of forest carbon density and its distribution pattern for forest and global carbon cycling. By using the forest inventory and allometric approaches, we measured carbon density and its distribution characteristics of young growth Pinus koraiensis plantations in different regions of Heilongjiang Province including southern slope of Xiaoxing’an Mountains, eastern slope of Zhangguangcai Mountains, western slope of Zhangguangcai Mountains, and Wanda Mountain). Among different regions, vegetation C pool and detritus C pool of P.koraiensis plantations varied significantly, but there was no significant differences in soil C pool and total C density. Vegetation, detritus, soil and total ecosystem C density were 35.95-76.36, 3.52-11.34, 101.96-173.37 and 154.54-256.78 tC·hm^-2, respectively. The distribution proportion of each ecosystem components were 18.78%-30.34%, 1.79%-5.24% and 65.58%-79.43%, respectively, and all differed significantly among regions. Overstory organs (except leaf) C density and its distributions were different significantly among regions. The C density of stem, branch, leaf and root were 22.47-47.11, 2.30-12.31, 2.90-5.80 and 7.02-17.16 tC·hm^-2, respectively. And the corresponding distribution proportion were 51.98%-64.80%, 6.68%-17.19%, 6.55%-834% and 20.23%-22.55 %, respectively. Root-shoot ratio (R/S) and ratio of soil C density (include detritus C density) to vegetation C density (SC/VC) were 0.26-0.29 and 2.31-4.69, respectively, with significant difference among regions. Basal area exhibited highly significant positive correlation with overstory C density, vegetation C density and forest ecosystem total C density (P<0.01), which can well reflect the dynamic of forest ecosystem C density.

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