浙江省森林碳分布与地形的相关性

浙江森林资源的空间分布与地形关系密切。研究森林碳分布与地形的关系，可以进一步认识浙江省森林碳分布的空间特征。利用基于浙江省2009年森林资源连续清查（CFI）固定样地数据和地统计学方法获得的全省森林碳空间分布信息，对森林碳分布与地形相关性进行了定量研究。结果显示:全省森林碳密度与地形主要因子海拔、坡度的二元二次多项式的复相关系数为0.71左右，说明森林碳分布与地形密切相关，即与地形的分布基本一致，随着海拔的升高和坡度的增大森林碳密度增大，尤其在海拔0~200 m到200~400 m，坡度从平坡到缓坡，碳密度上升最快。图2表4参20

Correlation between forest carbon distribution and terrain elements of altitude and slope

To better understand the forest carbon spatial distribution characteristics in Zhejiang Province，the relationship between forest carbon distribution and terrain （altitude and slope） was studied. This paper employed the Carbon Farming Initiative （CFI） dataset collected in 2009 and the forest carbon spatial distribution information for the whole province along with geostatistical techniques to quantitatively determine the correlation of forest carbon distribution and terrain. Multiple correlation coefficients of the binary quadratic multinomial were formed for the provinces forest carbon density versus terrain altitude and gradient. Results indicated that the multiple correlation coefficients of the binary quadratic multinomial were about r = 0.71. For altitudes of 0 - 400 m and a gradient of 0 - 5，forest carbon density increased fastest. This showed that forest carbon distribution was closely related to terrain and corresponded to the terrain distribution rule that forest carbon density increased with an increase in altitude and in gradient.［Ch，2 fig. 4 tab. 20 ref.］