俄罗斯杨热值与含碳率特征分析

对新疆克拉玛依地区的乔木俄罗斯杨茎、枝、根的干、皮的热值、灰分、化学组分、含碳率进行研究。结果表明:俄罗斯杨不同器官的热值变化表现为干的热值均大于皮的热值。不同器官的热值为主干干(19.220 kJ/g)>主干皮(18.867 kJ/g)>侧枝干(18.381 kJ/g)>根干(18.162 kJ/g)>侧枝皮(17.914 kJ/g)>根皮(16.243 kJ/g);俄罗斯杨的热值与灰分含量之间没有显著的相关性(P>0.05);皮的灰分含量极显著高于干(P<0.01);化学成分中木质素与热值之间存在显著的正相关(P<0.05),相关系数为0.464;俄罗斯杨的主干、侧枝、根的干的含碳率分别为49.15%、49.30%、48.71%,明显高于其皮的含碳率46.76%、47.40%、44.42%。俄罗斯杨干的热值与含碳率之间没有显著的相关关系(P>0.05),皮的热值与含碳率之间存在极显著的正相关(P<0.01),相关系数为0.677。

Characteristics Analysis of Caloric Value and Carbon Contents in Populus russkii

In this paper,the caloric value,ash contents,chemical compositions and carbon content of trunk and bark of the stem,branch,root from Populus russkii in Kelamayi,Xinjiang were analysed.The results showed that the caloric value of trunk was higher greater than the bark,and the order from high to low as follows: the trunk(19.220kJ/g) > the bark of trunk(18.867kJ/g) >the xylem of branch(18.381kJ/g)>the root(18.162 kJ/g)>the bark of branch(17.914kJ/g) > the bark of root(16.243kJ/g).There was no significant correlation between the caloric value and the ash contents(P>0.05).The ash content from bark was significantly higher than trunk(P<0.01).Lignin was positive correlated with the caloric value(P<0.05) and its correlation coefficient was 0.464.There was no significant correlation between the caloric value and the carbon content(P>0.05),and there was significant positive correlation between the caloric value of bark and the carbon content and the correlation coefficient was 0.677(P<0.01).