Ecological adaptation of leaf gas exchange of trees used for re-vegetation under different experimental light regimes

Abstract

Abstract: Leaf gas exchange of 8 tree species that have been widely used for re vegetation in hilly lands of South China were examined under different light regimes. Their light saturation point, mean daily net photosynthetic rate, leaf temperature, mean values of daily stomatal conductance, intrinsic water use effciency, and photosynthetic radiation-use-efficiency were compared. The results showed that Mlichelia macclurei andCastanopsis fissa had attributes of late successional species that could survive and grow well under shade condition. They should not be selected for construction of pioneer community. Acacia auriculaeformis , A. mangium , and Cinnamomum camphora were typical sunny species and had distinct characteristics of early-successional species. Castanopsis hystrix and Ormosia pinnata displayed sunny attributes except for leaf temperature. These species could be considered as composition species when assembling pioneer community. Schima wallichii , however, was transitional species of succession process. Its both early-and late-successional attributes suggest that it was suitable to be use for maturing pioneer community improvement.

Key words: Benzo(a)pyrene, Municipal sludge, Soil, Organic pollutants

CLC Number:

Q945

ZHAO Ping, ZENG Xiaoping, PENG Shaolin. Ecological adaptation of leaf gas exchange of trees used for re-vegetation under different experimental light regimes[J]. cje, 2003, (3): 1-8.

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