云南省云南松林碳密度空间分布特征及其与环境因子的关系

Spatial distribution characteristics of carbon density and its relationship with environmental factors in Pinus yunnanensis in Yunnan Province

基于云南省132个云南松林样地的调查数据,利用反距离权重插值法(inverse distance weighting,IDW),计算了云南松林的碳密度,并分析其空间分布特征及其与纬度、海拔的相关性.结果表明:利用IDW能够很好地进行云南松各器官碳密度空间分布的估算,树干的碳密度变化范围是0.46~42.69 t·hm^2,树枝为0.33~33.35 t·hm^2,树叶为0.12~12.42 t·hm^2,树根为0.27~28.29 t·hm^2,全树的碳密度变化范围为1.18~115.88t·hm^2,表现为树干>树枝>树根>树叶;各部分(干、枝、叶、根)及全树碳密度与纬度、海拔密切相关;云南松林在26°~29°N上的碳密度最大,随后依次是23°~25°N、25°~26°N.

Based on the survey data of 132 Pinusyunnanensis forest plots in Yunnan Province,the carbon density of Pinus yunnanensis forest was calculated by inverse distance weighting（ IDW）,and its spatial distribution characteristics and correlation with latitude and altitude were analyzed.The results showed that the IDW could be used to estimate the spatial distribution of carbon density in the organs of Pinus yunnanensis,and the variation of the carbon density of the trunk was from 0.46 t·hm^2 to 42.69 t·hm^2,the branches,the roots and the leaves was,0.33—33.35 t·hm^2,0.27—28.29 t·hm^2,and 0.12—12.42 t·hm^2,respectively.The carbon density of full tree ranged from 1.18—115.88 t·hm^2,which represented the trunkbranchestree rootsleaves.The density of each part（ trunks,branches,leaves and roots） and whole tree was closely related to latitude and altitude. The density of carbon in Pinus yunnanensis forest was the highest at 26°—29° N,followed by 23°—25° N and 25°—26°N.