Photosynthetic characteristics of main urban forest species Syringa oblata in Shenyang

Abstract

Abstract: Using LI-6400 CO₂ gas analysis system and by the methods of correlation analysis and multinomial regression, this paper studied the diurnal changes of Syringa oblata photosynthesis during different seasons and assessed the correlation between net photosynthetic rate and environmental factors. The results indicated that the photosynthetic rate showed a double-peak curve in spring and summer and a single peak curve in autumn. The major factors affecting the photosynthetic rate were the solar radiation and stomatal conductance in spring and summer, and the stomatal conductance and intercellular CO₂ intensity in autumn. The related equation was also constructed in this paper.

Key words: Photosynthesis, Eco-physiology, Urban forest

CLC Number:

Q945.11

LI Haimei, HE Xingyuan, CHEN Wei . Photosynthetic characteristics of main urban forest species Syringa oblata in Shenyang[J]. Chinese Journal of Applied Ecology, 2004, (12): 2245-2249.

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