广西植物2016，Vol.36Issue(7)：788-794,7.DOI:10.11931/guihaia.gxzw201412017
华南十种桉树的热值与灰分含量比较
Comparison of calorific values and ash contents of ten Eucalyptus species in South China
摘要
Abstract
Eucalyptus is one of the raw materials for forest bio-energy industry. Calorific value and ash content were two important indices for rational use of bio-energy Eucalyptus forest. Calorific values and ash contents of leaves, branches, roots, stem-wood and bark of 10 Eucalyptus species including Eucalyptus urophylla × E. grandis in South China were de-termined by using calorimeter and muffle furnace. The results showed that gross calorific values ( GCV) and ash free cal-orific values (AFCV) of different organs ranged from 15.10 to 21.06 kJ.g-1 and 16.05 to 22.11 kJ.g-1 respectively, leaves had the highest mean GCV and AFCV(19.50 kJ.g-1and 20.56 kJ.g-1) and bark the lowest(17.32 and 18.09 kJ.g-1 ) , which indicated that leaf had higher organic matters than other organs. The orders of decreasing GCV and AF-CV of 5 organs in 10 Eucalyptus species were not exactly the same. The ash contents of different organs ranged from <br> 0.14% to 8.5% with leaves having the highest mean value(5.13%) and stem-wood the lowest(0.30%),which indicated that leaf had more mineral elements than other organs. There were significant differences in calorific values and ash con-tents of 5 organs (P<0.05). As to the whole tree, E. urophylla had the highest GCV and AFCV(18.99 and 19.18 kJ. g-1), while Corymbia torelliana had the lowest GCV and AFCV (17.53 and 17.86 kJ.g-1);C. torelliana had the high-est ash contents(1.9%) and Eucalyptus grandis the lowest(0.61%). The results of correlation analyses showed that ash content had negative correlation with GCV and AFCV,which was not significant;GCV and AFCV had significantly posi-tive correlation ( P<0.01) . For ideal plant fuel should have the characteristics of high calorific value and low ash con-tent, of 10 species, Corymbia torelliana had low calorific values and high ash contents, which indicated that it was not ideal fuel species while Eucalyptus urophylla was the optimal species.关键词
桉树/热值/灰分含量/生物质能源/华南Key words
Eucalyptus/calorific value/ash content/bio-energy/South China分类
农业科技引用本文复制引用
周群英,陈少雄,韩斐扬..华南十种桉树的热值与灰分含量比较[J].广西植物,2016,36(7):788-794,7.基金项目
中央级公益性科研院所基本科研业务费专项( CAFINT2008C13)[ Supported by the Special Foundamental Research Fund of the Central Research Institutes of Public Benefit (CAFINT2008C13)]。 （ CAFINT2008C13）
