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中亚热带常绿阔叶林优势树种幼树光合特性季节动态(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2014年05期
Page:
157-160
Column:
研究简报
publishdate:
2014-09-30

Article Info:/Info

Title:
Seasonal dynamic study on photosynthetic characteristics of dominant evergreen broadleaved forest
Article ID:
1000-2006(2014)05-0157-04
Author(s):
ZENG Wei XIONG Caiyun XIAO Fuming QIU Fengying YU Lin XIONG Zhenyu XU Haining
Jiangxi Academy of Forestry, Nanchang 330032, China
Keywords:
Castanopsis carlesii C. fargesii Schima superba photosynthetic characteristics maximum net photosynthetic rate light compensation point light saturation point
Classification number :
S718.5
DOI:
10.3969/j.issn.1000-2006.2014.05.031
Document Code:
A
Abstract:
Based on modified exponential model, we estimated photosynthetic parameters of Castanopsis carlesii, C. fargesii and Schima superba during their vigorous growth period(spring, summer, autumn), which were dominant tree species in evergreen broad-leaved forest. The light saturation points of Castanopsis carlesii, C. fargesii and S. superba in spring were lest in three seasons, were 1 241.25, 1 245.93, 1 366.49, μmol/(m2·s)respectively, and their maximum net photosynthetic rates in summer were most in three seasons, were 3.78, 5.39, 7.20 μmol/(m2·s)respectively. The light compensation point, light saturation point, maximum net photosynthetic rate, dark respiration rate of Schima superba were all more than Castanopsis carlesii and C. fargesii in spring. In summer and autumn, the light saturation points of Castanopsis fargesii and S. superba were both more than Castanopsis carlesii. Furthermore, the maximum net photosynthetic rates of S. superba were more than Castanopsis carlesii and C. fargesii, and also more than C. carlesii in autumn. The result of comprehensive comparison was that the photosynthetic capacity and adaptability to light environment of Schima superba were strong, and then that was C. fargesii, and C. carlesii was last.

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Last Update: 2014-10-31