大兴安岭三种森林类型地表可燃物燃烧气体排放量的研究

Study on Gas Emission from Surface Fuels of Three Forest Types in Daxing'anling

以大兴安岭林区兴安落叶松林、樟子松林和杨桦林中的草本、枯枝和半分解层为研究对象,采取外业调查取样及室内控制环境燃烧实验相结合的方法,分析了不同林型、不同可燃物燃烧过程CO2、CO、CxHy、NO和SO2释放量的差异。结果表明,草本燃烧CO2排放量阔叶林(杨桦林)大于针叶林(兴安落叶松林、樟子松),针叶林(兴安落叶松林、樟子松)枯枝CO2排放量大于阔叶林(杨桦林),而半分解层兴安落叶松林CO2排放量大于杨桦林和樟子松林。兴安落叶松林半分解层除NO释放量以外,其它四种气体与草本、枯枝无显著的差异。

Using the method of field investigation and laboratory condition control burning experiments, the author of this article took grass, dead wood and semi - decomposed layer of Larch stand, Pinus sylvestris var. mongolica stand and poplar - birch stand in the Daxing＇ anling of Heilongjiang Province as research object, and analyzed.the release capacity of CO2, CO, CxHy, NO, SO2 from different forest fuels and forest type. Results showed that the broad - leaved stands （poplar - birch stand） had more CO2 emission from grass than that of the needle- leaved stands （larch stand, Pinus sylvestris vat. mongolica stand） ; and the needle- leaved stands （larch stand, pinus sylvestris vat. rnongolica stand） had more CO2 emission from dead branches than that of the broad- leaved stands （poplar- birch stand）, but in semi - decomposed layer larch released more CO2 than the other two kinds of forest type. Except NO emission from semi - decomposed layer, CO2, CO, CxHy and SO2 from grass and dead branches of larch stand made little differences.