树龄对桉树杂交种发热量和其它燃料特性的影响(英文)

Effect of tree-age on calorific value and other fuel properties of Eucalyptus hybrid

为了探讨树龄对桉树杂交种燃料特性的影响,对2-6年生的幼树和20年生的成熟树木材基本密度、发热值、近似和最终参数的变异性进行了测定和分析。结果表明,2-6年生的幼树的木材基本密度没有显著变化,平均值为0.55-0.58g.cm-3。成熟树木材的发热量高于幼龄材,但幼龄树木材的灰烬含量要高于成熟材。不同树龄木材的挥发物质和固定碳的含量没有明显的变化趋势。研究表明,桉树杂交种成熟材的燃料特性稍好于幼龄材的燃料特性。

For determining the effect of tree-age on the fuel properties of Eucalyptus hybrid, the variability in basic density, calorific value, proximate and ultimate parameters of 2-6 years old trees and mature trees （20- year-old）, grown under short rotation forestry regime, were measured and analyzed. Results show that there was no significant variation in the basic density of wood for 2-6 year-old Eucalyptus hybrid, with average value of 0.55-0.58 g.cm-3; the calorific value of mature trees was higher than that of lower age trees, but the ash content was much higher in lower age trees compared to mature trees. No particular trend was observed for volatile matter content and the fixed carbon content with tree-age. In conclusion, the fuel properties of mature tree were marginally better than trees of lower age.