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不同林龄尾细桉人工林的生物量和能量分配
引用本文:周群英,陈少雄,韩斐扬,陈文平,吴志华.不同林龄尾细桉人工林的生物量和能量分配[J].应用生态学报,2010,21(1):16-22.
作者姓名:周群英  陈少雄  韩斐扬  陈文平  吴志华
作者单位:1. 国家林业局桉树研究开发中心,广东湛江,524022
2. 中国国营林场开发总公司国营雷州林业局,广东遂溪,524348
基金项目:中央级公益性科研院所基本科研业务费专项资金(CAFINT2008C13)资助
摘    要:对广东省遂溪县北坡林场1~4年生尾细桉人工林的生物量和能量进行研究.结果表明:林龄对林分现存生物量影响极显著(P0.01),1~4年生林分生物量在10.61~147.28t.hm-2,随林龄增加,各组分和林分的生物量均增加,叶片、枝、树皮生物量占林分总生物量的比例逐年减小,而树干则呈逐年升高趋势.4个林龄阶段各组分生物量的分布规律,1~2年生为树干枝树皮根叶片,3~4年生为树干根枝树皮叶片.不同林龄各组分的平均灰分含量在0.47%~5.91%,以树皮的灰分含量最高、树干最低.各组分的平均干质量热值和去灰分热值分别为17.33~20.60kJ.g-1和18.42~21.59kJ.g-1,均以叶片数值最高、树皮最低.林龄对枝、树干、树皮的干质量热值及对叶片、树干、树皮的去灰分热值有显著影响(P0.05),对叶片和根的干质量热值、枝和根的去灰分热值及植物体热值的影响不显著(P0.05).1~4年生尾细桉的林分能量现存量在199.98~2837.20GJ.hm-2,林龄对其的影响达极显著水平(P0.01),随林龄增长,各组分和林分能量现存量增加,且各组分能量分配比例的变化趋势与生物量相同.

关 键 词:林龄  尾细桉  生物量  热值  能量

Biomass - and energy allocation in Eucalyptus urophylla×Eucalyptus tereticornis plantations at different stand ages.
ZHOU Qun-ying,CHEN Shao-xiong,HAN Fei-yang,CHEN Wen-ping,WU Zhi-hua.Biomass - and energy allocation in Eucalyptus urophylla×Eucalyptus tereticornis plantations at different stand ages.[J].Chinese Journal of Applied Ecology,2010,21(1):16-22.
Authors:ZHOU Qun-ying  CHEN Shao-xiong  HAN Fei-yang  CHEN Wen-ping  WU Zhi-hua
Institution:China Eucalypt Research Centre|Zhanjiang 524
022, Guangdong, China;Leizhou Forestry Bureau of China National State Fo
rest Farm Development Corporation|Suixi 524348, Guangdong, China
Abstract:An investigation was made on the biomass- and energy allocation in 1-4 year old  Eucalyptus urophylla×Eucalyptus tereticornis plantations at Beipo Forest
Farm of Suixi County in Guangdong Province. Stand age had significant effects on
 the retained biomass of the plantations (P<0.01). The biomass was in the
range of 10.61-147.28 t·hm-2. Both the total biomass
and the biomass of above and belowground components increased with increasing
 stand age. The proportions of leaf , branch and bark biomass to total biomas
s decreased with year, while that of stem biomass was in reverse. The biomass al
location of the components in 1- and 2- year-old plantations decreased in  order of stem>branch>bark>root>leaf, and that in 3-  and 4-year-old plant
ations  was in  order of stem>root>branch>bark>leaf. The mean ash co
ntent (AC) of the five components at different stand ages ranged from 0.47% to 5
.91%, being the highest in bark and the lowest in stem. The mean gross caloric v
alue (GCV) and ash free caloric value (AFCV) of different components ranged from
 17.33 to 20.60 kJ·g-1 and from 18.42 to 21.59 kJ·g-1 respect
ively. Of all the components, leaf had the highest GVC and AFCV, while bark had
 the lowest ones. Stand age had significant effects on the GVC   of branch, stem,
and bark, and on the AFCV of leaf, stem, and bark (P<0.05), but the effect
s on the GVC of leaf and root, the AFCV of branch and root, and the GVC and AFCV of indiv
idual trees were not significant (P>0.05). The retained energy of 1-4-year-old plantations ranged from 199、98 to 2837、20 GJ·hm-2, with si
gnificant differences among the stand ages (P<0.01). The retained energy o
f various components and plantations increased with stand age, and the energy al
location of various components had the same trend as biomass allocation.
Keywords:stand age  Eucalyptus urophylla×  Eucalyptus tereticornis  biomass
  caloric value  energy
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