中文摘要：

通过对大兴安岭地区主要乔木灰分含量的测定，分析了不同树种以及同一树种不同部位灰分含量的异同，并试图分析产生差异的原因。研究结果表明，各树种均以干部灰分含量为最低，树皮和枝部灰分含量差异不大；山杨除树干以外，灰分含量明显高于其它树种；树种之间灰分含量差异显著，而上、中、下部枝之间以及其它部位之间灰分含量差异不显著。可燃烧物灰分含量与全碳量之间存在负相关关系。

英文摘要：

The similarities and differences of ash contents of different species and different parts of the same species are analysed by measuring ash contents of main arbor species in Daxing＇an Mountains. The reasons that result in the differences are found out. Result showed that each tree specie has a low ash content in trunk and a slight difference in ash contents of bark and branch. Except for trunk, the ash content of Populus davidiana is significantly higher than that of other tree species. The difference in ash content of different species is remarkable, while it is not significant between branches in upper, middle, and lower crown positions and between other parts. Ash content of forest fuels has a negative relationship with carbon content.