6种乔木树种固碳能力和能量转化效率分析

对新疆克拉玛依地区的6种乔木树种树干和树皮的热值与含碳率进行测定和分析,结果表明：白榆树干的热值含量最高,为19.272 kJ/g;沙枣树干的含碳率最高,为49.66%;胡杨和俄罗斯杨、新疆杨和银×新杨这2组树种树干的热值没有显著性差异,其余树种树干的热值间均存在显著性差异;白榆树皮的含碳率与其余树种间均存在极显著性差异。按照生物量、固碳量、热值等数据综上分析得出,在克拉玛依地区优先选择高效固碳与能源乔木树种的顺序为：白榆、银×新杨、新疆杨、沙枣、胡杨、俄罗斯杨。

Analysis on Carbon Sequestration Capacity and Energy Transfer Efficiency of Six Arbor Tree Species

The caloric value and carbon content rate of the trunk wood and bark of six arbor tree species grown in Kelamayi area,Xinjiang Uygur Autonomous Region were determined.The six tree species were Ulmus pumila,Elaeagnus angustifolia,Populus euphratica,Populus russkii,Populus bolleana,and Populus alba×Populus bolleana.The results showed that the caloric value of Ulmus pumila＇s trunk wood was 19.272 kJ/g,which was the greatest of the six tree species.The carbon content rate of Elaeagnus angustifolia was the highest by 49.66%.There were no significant differences in caloric value of the trunk wood between Populus euphratica and Populus russkii,neither between Populus bolleana and Populus alba×Populus bolleana.Whereas there were significant differences in the caloric value of trunk wood among any other pairs of the species.There were significant differences in carbon content rate of the bark between Ulmus pumila with the rest five tree species.According to the comprehensive analyses of the biomass per hectare,the capacity of carbon sequestration and caloric value,the six arbor tree species were ranked in the order as Ulmus pumila,Populus alba×Populus bolleana,Populus bolleana,Elaeagnus angustifolia,Populus euphratica and Populus russkii regarding the capacity of carbon sequestration and bio-energy producing efficiency in Karamayi area.