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[1]WU Yan-wen,ZHANG Jin-chi,GU Zhe-yan,et al.Study on Photosynthesis-transpiration Characteristics of Two Broadleaf Woody Plant Species in the Forests of Baishanzu[J].Research of Soil and Water Conservation,2014,21(06):204-210.

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Study on Photosynthesis-transpiration Characteristics of Two Broadleaf Woody Plant Species in the Forests of Baishanzu

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 06 Page number: 204-210 Column: Public date: 2014-12-28

Title:: Study on Photosynthesis-transpiration Characteristics of Two Broadleaf Woody Plant Species in the Forests of Baishanzu

Author(s):: WU Yan-wen, ZHANG Jin-chi, GU Zhe-yan, LIU Xin, HAN Cheng; Nanjing Forestry University, Nanjing 210037, China

Keywords:: Baishanzu; net photosynthetic rate; transpiration rate; physiological factor; ecological factor

CLC:: S718.43

DOI:: -

Abstract:: Photosynthesis and transpiration play the significant roles in the evaluation of ecological benefits from a forest ecosystem. In order to determine their photosynthesis and transpiration characteristics at canopy level, this paper conducted some measurements with Li-6400 portable photosynthetic apparatus on two typical tree species in the forest ecosystem of Fengyang Mountain. Results show that the main factors influencing P_n of Stewartia acutisepala were WUE and PYR, meanwhile, the main factors influencing P_n of Pterostyrax corymbosus were C_i and PYR. In the process of daily variation of P_n, the value of Stewartia acutisepala was always higher than Pterostyrax corymbosus. It can be judged that the photosynthesis of Stewartia acutisepala was stronger than Pterostyrax corymbosus. Additionally, the main factors influencing T_r of Stewartia acutisepala were G_s and PAR, while the main factors influencing T_r of Pterostyrax corymbosus were G_s and RH. According to daily variation of T_r, the transpiration of Stewartia acutisepala was stronger than Pterostyrax corymbosus. According to the analysis of WUE, the carbon water balance ability of Stewartia acutisepala was better than Pterostyrax corymbosus. Therefore, the adaptability of Stewartia acutisepala to this habitat was superior to Pterostyrax corymbosus, and the former was more widely distributed.

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