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SCI论文目录 |
鼎湖山季风常绿阔叶林各层次优势种热值研究 |
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| 出 版 社：北京林业大学学报 |
| 发表时间：2005 |
| 台 站：
鼎湖山森林生态系统定位研究站
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| 作 者：旷远文 温达志 周国逸 刘世忠 张德强 |
| 点 击 率：6465 |
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| 关 键 字：鼎湖山 季风常绿阔叶林 干重热值 去灰分热值 灰分含量 |
| 摘 要：探讨鼎湖山南亚热带季风常绿阔叶林不同层次优势植物热值一般规律,可为该群落能量特征和生态效率研究提供基础资料和科学依据.2 0 0 2年用PARR 12 81型氧弹热值仪测定了该群落不同层次2 1种优势植物不同器官(部位)热值.结果表明,季风常绿阔叶林各优势种的平均干重热值在15 92～19 6 6kJ g间,乔木1层干重热值以厚壳桂最高,乌榄最低;乔木2层华润楠最高,云南银柴最低;层间藤本植物白背瓜馥木和杖枝省藤分别为19 73和18 19kJ g ;灌木层干重热值最高仍为厚壳桂,最低为云南银柴;草本层植物干重热值在15 92～17 5 2kJ g之间.各层优势种平均干重热值和去灰分热值都表现为:层间藤本>乔木1层>乔木2层>灌木层>草本层.植物器官去灰分热值存在差异,乔木1层中锥栗、荷木树皮及厚壳桂、乌榄树叶最高,乔木2层中云南银柴根最高,层间植物叶>干>根,草本植物是地上部分>地下部分;同种植物(厚壳桂或云南银柴)在不同层次中的去灰分热值没有明显差别,器官生长的年龄(或直径)对去灰分热值有影响,随年龄增大,去灰分热值有减少趋势 |
| 关 键 字(英文)：Dinghushan monsoon evergreen broad-leaved forest gross caloric value ash-free caloric value ash content |
| 摘 要(英文)：Investigation of the caloric values of the dominant species from different layers in lower subtropical
monsoon evergreen broad-leaved forest in the Dinghushan Mountain may provide scientific foundamental data
for studying energy flow and ecological efficiency. The values were measured by the PARR 1281 oxygenic
bomb caloric-meter. The mean gross caloric values ( GCV) of the 21 dominant species were in the range of
15192～19180 kJPg. Cryptocarya chinensis was the highest and Canarium pimela was the lowest GCV species
in tree layer 1 , while the corresponding species were Machilus chinensis and Aporosa yunnanensis in tree layer
21The lianas , Fissistigma glaucescens and Calamus rhabdocladus had the values of 19173 kJPg and 18119
kJPg , respectively. In the shrub layer , the highest GCV species was Cryptocarya chinensis and Aporosa
yunnanensis the lowest . The mean GCV of the three herbaceous species was 15192～17152 kJPg. The GCV
and ash-free caloric value (AFCV) decreased in the following order : lianas , tree layer 1 , tree layer 2 , shrub
layer and herb layer. The AFCV differed among various components. In tree layer 1 , Castanopsis chinensis
and Schima superba showed the highest values in barks , whereas Cryptocarya chinensis , and Canarium pimela
had their highest values in the leaves. In tree layer 2 , however , Aporosa yunnanensis showed the highest value
in roots. For lianas , the AFCV decreased from the leaves , stems to roots. In the herb species , the AFCV
aboveground was higher than the belowground. Minor differences in AFCV were observed for the same species
( Cryptocarya chinensis or Aporosa yunnanensis ) in different layers. The AFCV of the woody components
tended to decease with age and diameter increment . |
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 鼎湖山季风常绿阔叶林各层次优势种热值研究.PDF |
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