Journal of Guangxi Normal University(Natural Science Edition) ›› 2010, Vol. 28 ›› Issue (1): 47-53.

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Daily Changes of Photosynthetic Ecophysiological Characteristicsof Restoration Tree Species in Peak Cluster Depression Region:a Case Study of Nongla,Mashan County,Guangxi,China

SHEN Li-na1, JIANG Zhong-cheng1,2, QING Xing-ming1, WUKong-yun3, LIANG Ming-zhong1, MA Zu-lu1, LI Hui4   

  1. 1. Institution of Karst Geology,Chinese Academy of Geology Sciences,Guilin Guangxi 541004,China;
    2. College of Resource and Environment Science,Guangxi Teachers EducationUniversity,Nanning Guangxi 541004, China;
    3. Shaanxi Nuclear Industry Geology Board,Xi'an Shaanxi 710024,China;
    4. College of Environment and Resources,Guangxi Normal University,GuilinGuangxi 541004,China
  • Received:2009-10-20 Online:2010-03-20 Published:2023-02-07

Abstract: Physiological characters of different restoration tree species in NongLa peak cluster depression were mensurated by LI-6400,such as Radermachera sinica,Toona sinensis,Bambusa lapidea,Zenia insignis and Leacaena leucacephala.By comparing their daily change of net photosynthetic rate Pn,and solar radiation PAR,etc,it can be found that environment factors daily changes were complex.Communities of different restoration tree speciesadjust to the microclimate differently.Zenia insignis and Radermachera sinica were in higher average Pn level.Leacaena leucacephala showed “midday depression” of photosynthesis obviously.Radermachera sinica was in higher average E level.Leacaena leucacephala and Zenia insignis were inhigher average WUE level.Toona sinensis was in the highest average AQE level.Different factors influenced photosynthesis of these restoration treespecies differently.Stepwise regression method was used to establish linear regression equations of net photosynthetic rate and various factors,which were statistically significant and had a good preditability.

Key words: peak cluster depression, restoration tree species, netphotosynthetic rate, ecophysiological factors

CLC Number: 

  • Q945.11
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