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 .
鼎湖山季风常绿阔叶林各层次优势种热值研究