桂西南连续年龄序列尾巨桉人工林能量及其分布特征  

The Energy and Distribution Characteristics of Eucalyptus urophylla ×E. grandis Plantations with Continuous Age Sequences of Southwest Guangxi

作　　者：韦建宏 李春宁 付军 吕小燕[2] 何斌[2] 

机构地区：[1]广西国有派阳山林场,宁明532500 [2]广西大学林学院,南宁530004

出　　处：《广西林业科学》2017年第4期416-419,共4页Guangxi Forestry Science

基　　金：国家自然科学基金项目(31160152;31560206;31760201)

摘　　要：采用标准样地法对广西宁明县1~4年生尾巨桉(Eucalyptus urophylla×E.grandis)人工林的热值、能量及其分布特征进行了研究。结果表明,尾巨桉不同器官的热值在17.63~21.12 kJ/g之间,其大小排列为树叶>干材>树枝>树根>树皮。1~4年生尾巨桉人工林能量现存量在173.28~1 891.49 GJ/hm^2之间,随生长过程中林分生物量增加而增大,不同器官能量现存量与其生物量成正比例关系。桂西南1、2、3和4年生尾巨桉人工林能量年现存量分别为173.28、460.47、475.67、472.87 GJ/(hm^2·a)。因此,从生物生产力和能源量考虑,尾巨桉可作为桂西南的生物质能源树种。The standard plot method was applied to study the caloric value, energy pattern and its distribution characteristics from one-year-old to four-year-old Eucalyptus uropbylla xE. grandis plantations in Ningming county of Guangxi. The results showed that caloric values in different organs of E. urophylla xE. grandis ranged form 17.63 kJ/g to 21.12 kJ/g, the order of which was leave〉 stem wood 〉 branch 〉 root 〉 stern bark. The standing crop of energy of one-year-old to four-year-old E. urophylla x E. grandis plantations ranged from 173.28 GJ/hm2 to 1 891.49 GJ/hm2 and amplified with the increase of stand biomass. There was positive rela- tionship between standing crop of energy and biomass in different organs. The annual standing crop of energy of one-year-old, two-year-old, three-year-old, four-year-old E. urophylla xE. grandis were 173.28, 460.47, 475.67 and 472.87 GJ/ （hm2·a） , respectively. Therefore, considered the biological productivity and energy, the E. urophylla x E. grandis can be the bioenergy tree in southwest Guangxi.

关 键 词：尾巨桉 人工林 热值 能量 林龄 

分 类 号：S792.39[农业科学—林木遗传育种]