北京松山自然保护区次生林主要乔木地上碳储量及其分布

以松山自然保护区次生林为主要研究对象，采用2007年松山自然保护区国家重点生态公益林的17个标准地的调查数据，就其中7种主要乔木（DBH〉14cm）的地上碳储量及其伴随径级的分布特征进行了研究。结果显示：①地上碳储量大小排列为蒙古栎（35714．7158kg／hm2）〉油松（30008．8550kg／hm2）〉山杨（24376．7789kg／hm2）〉桦树（17620．6612kg／hm2）〉五角枫（7985．4425kg／hm2）〉椴树（5284．8026kg／hm2）〉核桃楸（3448．3767kg／hm2）；②在地上碳储量径阶分布方面，蒙古栎、山杨、油松、桦树区别于其他3种阔叶树，碳储量变化剧烈。

Above-ground Carbon Storage and Distributions of Main Tree Species in Natural Secondary Forest of Beijing Songshan Nature Reserve

Based on natural secondary forest of Songshan Nature Reserve as the main research object, using the investigation data of 17 sam- ples lots of national key ecological public welfare forest in 2007, the above-ground standing carbon storage of seven main tree species（ DBH ≥ 4 cm）and their distribution according to DBH classes were studied. The results are showed as following： （ 1 ） The amount of above-ground standing carbon storage of main tree species in this sequence： Quercus mongolica（35 714. 715 8 kg/hm2） 〉Pinus tabuliformis（30 008. 855 0 kg/hm2） 〉 Populus davidiana（24 376. 778 9 kg/hm2） 〉 Betula spp（ 17 620. 661 2 kg/hm2） 〉 Acer truncatum （7 985. 442 5 kg/hm2） 〉 Tilia mandschurica （5 284. 802 6 kg/hm2） 〉 Juglans mandshurica （3 448. 376 7 kg/hm2） ;（2） On the above-ground carbon storage distribution of DBH classes. The carbon storage curve of Quercus mongolica, Populus davidiana, Pinus tabuliformis and Betula spp are severer than other 3 species.