Comparative study on the adaptability of Alnus trabeculosa and Phragmites australis in tidal wetland

Abstract

Abstract: Self-designed experimental mesocosm for semidiurnal tidal simulation was used to compare the effect of different submergence time on photosynthesis process and physiological characteristics of Alnus trabeculosa and native species (Phragmites australis). The results showed that A. trabeculosa and P. australis have similar decreasing tendency in Stomatal conductance (Gs), Net photosynthetic rate (Pn) and Transpiration rate (Tr) with increasing submergence time; however, the water use efficiency (WUE) of these two species showed the tendency of first increased and then decreased, suggesting that the increasing submergence time promoted the WUE of A. trabeculosa and P. australis in some degree. With daily submergence time increasing, POD activity and MDA content of A. trabeculosa decreased and increased, respectively; POD activity of P. australis first increased and then decreased; however, MDA content of P. australis hasn’t significant difference. A. trabeculosa showed the similar tolerance to the periodic inundation of tidal wetland, which suggests that A. trabeculosa can be also used to construct ecological engineering in Chongxi wetland.

Key words: Chongxi wetland, Alnus trabeculosa, Phragmites Australis, smiulated waterlogging, eco-physiological process

CLC Number:

Q945.78

ZHANG Hai-yan, WANG Tian-hui, LU Jian-jian. Comparative study on the adaptability of Alnus trabeculosa and Phragmites australis in tidal wetland[J]. Journal of East China Normal University(Natural Sc, 2014, 2014(1): 107-115, 122.

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