尾巨桉不同器官热值影响因素研究

Study on Factors the Influencing Calorific Value of Component Tissues of Eucalyptus urophylla × E. grandis

对广东廉江石岭林场5年生尾巨桉不同器官的燃烧特性因子、物质组成成分和营养元素等指标进行了研究,并做了相关性分析。结果表明:5种器官去灰分热值在18.57~21.09 kJ·g^(-1)间,排序为叶片>树枝>树根>树干>树皮;去灰分热值和干质量热值、灰分相关显著,和粗纤维、粗蛋白、粗脂肪、全氮都显著相关,尾巨桉不同器官的热值受其物质成分及营养元素的影响。

We studied combustion characteristics,material composition and nutrient elements in different component tissues of 5 years old Eucalyptus urophylla×E.grandis at Shiling forest farm in Lianjiang,Guangdong,and examined associations among component tissue characteristics.Ash free calorific values(AFCV)of the 5 different component tissues ranged from 18.57 to 21.09 kJ·g-1,with their rank order by AFCVs being:leaves?branches?roots?stem-wood?bark.AFCV,gross caloric value and ash content were significantly correlated with each other,as were crude fiber,crude protein,crude fat and total nitrogen.AFCV of E.urophylla×E.grandis’s component tissues were found to be associated with their material composition and levels of key nutrient elements.