An Analysis on the Carbon Content Rate of Natural White Birch in Xiaoxinganling Mountain Area

Abstract

This paper applied dry combustion method to determinate the carbon content rates in different organs of natural white birch trees in xiaoxinganling mountain area and carried on the analysis and comparison. The results showed that: the average carbon content rates of leaves,branches,trunks and roots was 49.31 %,46.60,46.70%,45.67%,respectively.According to the average values, the sequence of carbon content rates in different organs from the maximum to the minimum was leaves,trunks,branches and roots. Additionally, in different layers of a tree, the sequence of carbon content rates in leaves from the maximum to the minimum was: the upper strata, the middle strata, the lower strata. The sequence of carbon content rates in branches was: the upper strata, the lower strata, the middle strata. The sequence of carbon content rates in trunks was: bark, sapwood, heartwood.The sequence of carbon content rates in roots was: level 2 root, level 1 root, level 3 root. Single tree average rate of carbon 46.49% Higher than 51.25% in northern China. Variance analysis showed that the differences of Bark and sapwood achieved significant level (p<0.05) as well as the differences of bark and heartwood, while the rest were not significant.