燕山北部地区华北落叶松林主要物种的碳含量

为了了解燕山北部山地华北落叶松(Larix principis-rupprechtii)人工林不同树种及其不同器官含碳率的差异,本试验采用湿烧法对燕山北部地区华北落叶松人工林主要物种各器官含碳率进行了研究。结果表明,华北落叶松林各主要树种以叶片含碳率为最高,约为55.57%,侧枝的含碳率与主干相近,分别为50.14%和50.30%;华北落叶松各器官平均含碳率为52.57%,低于本地区的山杨(Populus davidiana),而与白桦(Betulaplatyphylla)和棘皮桦(Betula dahurica)较为接近,但高于色木槭(Acer mono)和蒙古栎(Quercus mongolica);华北落叶松的含碳率与年龄没有明显的相关关系;华北落叶松林中,灌木及草本的平均含碳率分别为51.23%,48.98%,凋落物层含碳率低于各生物组分,并随着林分年龄的增加而逐渐降低。

Carbon content of main species of Larix principis-rupprechtii plantations in the northern region of Yanshan Mountain

In order to understand the carbon content differences in different organs and species of Larix principis-rupprechtii forests in the northern region of Yanshan Mountain,the carbon content of different organs in main species were measured using the wet burning method.The main results showed that the leaves carbon content of main specieswas the highest(55.57%),the carbon content of branch was similar with that of trunk,with the values of 50.14% and 50.3% respectively;The average carbon content of Larix principis-rupprechtii organs was 52.57%,which was lower than that of Populus davidiana in this area,similar with that of Betulla platyphylla and Betula dahurica,but higher than Acer mono and Quercus mongolica;The carbon content of Larix principis-rupprechtii forests showed no significant correlation with age.In the Larix principis-rupprechtii forests,the average carbon content of shrub and herb was 51.23% and 48.98% respectively,carbon content of litter was lower than that of other biological components,which reduced gradually with stand age.