Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (28): 7-10.doi: 10.11924/j.issn.1000-6850.casb16020005

Special Issue: 生物技术

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Photosynthetic and Fluorescence Physiological Characteristics of Different Aged Picea mongolica

Wang Fei, Liu Shizeng, Li Delu   

  1. (Gansu Desert Control Research Institute, Lanzhou 730070)
  • Received:2016-02-01 Revised:2016-05-12 Accepted:2016-05-25 Online:2016-10-11 Published:2016-10-11

Abstract: The aim was to comparatively analyze the difference among different aged Picea mongolica. Different aged Picea mongolica were used as materials. Li-6400 portable photosynthesis system was used to detect the photoresponse and chlorophyll fluorescence parameters. The results showed that: (1) Pn reduced gradually with the increase of tree age, Pn of 5-year-old tree was the highest, LSP of 10-year-old tree was higher than that of 5- year-old and 20-year-old tree, which meant Pn of 10-year-old tree was the most active, it was the production period of maximum photosynthetic product, in the most exuberant life period; (2) chlorophyll fluorescence parameters of different aged Picea mongolica were not significantly different (P>0.05),ΦPS and ETR reduced with Picea crassifolia age increase,ΦPSⅡ and ETR of 5-year-old tree were the highest.