新疆西伯利亚落叶松含碳系数分析

Analysis on carbon content factors of Larix sibirica Ledeb. in Xinjiang

【目的】提高区域范围或国家尺度上森林碳储量估算的精度,有利于监测森林系统的固碳能力。【方法】应用红外碳硫分析仪对80株新疆西伯利亚落叶松不同组分进行了含碳系数的测定,同时利用各组分实测生物量数据对平均含碳系数进行了分析。【结果】各组含碳系数分别为干材0.467 0、干皮0.485 1、树枝0.477 3、树叶0.474 3、树根0.476 8,干材及树根含碳系数因部位不同发生变化,但差异未达到显著水平,其离散系数变动范围在1%之内。【结论】西伯利亚落叶松总的含碳系数为0.476 1,干皮在各组分中含碳系数最高,干材最小;不同径阶及龄组各组分的离散系数均未超过7%。

[Objective] This study was conducted to improve the accuracy of forest carbon storage estimation on a regional or a national scale, which is helpful for monitoring carbon sequestration capacity of forest system. [ Method ] The carbon coefficients of different components of 80 Siberian larch （Larix sibirica Ledeb. ） in Xinjiang were determined using an infrared carbon/sulfur analyzer, and the average carbon coefficient was calculated based on measured biomass data. [ Result]The results showed that the carbon coefficients of stem, stem bark, branches, leaves and roots were 0. 467 0, 0. 485 1, 0. 477 3, 0.474 3 and 0.476 8, respectively.In other words, the carbon coefficients decreased in the following order： stem bark 〉 branches 〉 roots 〉 leaves 〉 stem. The carbon coefficients of stem and roots varied with different parts, but the differences were not significant, and the dispersion coefficient was less than 1%. [ Conclusion] The overall carbon coefficient of the Siberian larch was 0.476 1. The carbon coefficient of stem bark was the highest in each component, and stem was the smallest. The dispersion coefficients of different diameter classes and age groups were not more than 7%.