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干旱对北京东灵山4种木本植物生理特性的影响(PDF)

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

Issue:
2004年06期
Page:
23-26
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
Effects of Drought on Ecophysiological Characteristics of Four Woody Species in Beijing Dongling Mountain
Article ID:
1000-2006(2004)06-0023-04
Author(s):
ZHANG Cheng-jun~1GUO Jia-qiu~2XIE Heng-cai~3ZHANG Wen-hui~4
1.Northeast Forestry University,Harbin 150040,China;2.The Second Affiliated Hospital of Harbin Medical University, Harbin 150086,China;3.Landscape Administration of Harbin Taiyang Island,Harbin 150010,China; 4.Northwest Sci-Tech University of Agriculture
Keywords:
DroughtEcophysiological characteristicsQuercus liaotungensisFraxinus rhynchophyllaSpiraea pubescensLepsedeza bicolor
Classification number :
Q945
DOI:
10.3969/j.jssn.1000-2006.2004.06.006
Document Code:
A
Abstract:
Effects of drought were investigated on net photosynthetic rate(P_n,μmol/(m~2·s)),stomatal conductance(g_s,mmol/(m~2·s)),subcelluar CO_2 concentration(C_i,μmol/mol) and mesophyll conductance to CO_2(g_m,mol/(m~2·s)) in potted seedlings of four woody species(Quercus liaotungensis and Fraxinus rhynchophylla,Spiraea pubescens and Lepsedeza bicolor)from Q.liaotungensis forest in Beijing Dongling mountain.The results showed that soil drought which caused decreases in P_n,g_s,and g_m.C_i was maintained stable in two shrubs during the whole drought duration,whereas it was stable in two tree species only under mild drought but increased under serious drought.This suggests that the limitation to photosynthesis under drought conditions was not entirely attributed to stomatal limitation,but mainly to non-stomatal limitation.

References

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Last Update: 1900-01-01