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FOREST RESOURCES WANAGEMENT ›› 2009, Vol. 0 ›› Issue (3): 61-65.

• Science and Technology • Previous Articles     Next Articles

Effects of Shading on the Photosynthetic Characteristics and Growth of Magnolia sieboldii

DING Lei1, HU Wanliang1, WANG Wei1, LIU Zhengde2, LI Guosheng1, YAO Rongsheng1, ZHANG Yupeng1, WANG Gang1   

  1. 1. Liaoning Provincial Institute of Forest Management, Dandong 118002, Liaoning Province, China;
    2. Pianling Forestry Station of Benxi Manchu Autonomous County, Benxi 117119, Liaoning Province, China
  • Received:2008-12-26 Revised:2009-06-12 Online:2009-06-28 Published:2020-12-16

Abstract: The effects of different shading treatments(A:0, B:25.8%, C:61.3%, D:90.3%)on the photosynthetic characteristics and growth ofMagnolia sieboldii were examined.The results showed that the basal diameter, height and biomass at B treatment were higher than those at other shading treatments.The light compensation point(LCP), light saturation point(LSP) and dark respiration rate(DP)of the Magnolia sieboldii were at a low level, the value of which decreased with the increasing of shading degree.The daily variation of netphotosynthetic presented a bimodal curve under four shading treatments.The netphotosynthetic rate was B>A>C>D.It is obvious that B treatment can provide the most suitable condition for Magnolia sieboldii among four shading treatments.So we can conclude that moderate shading could increase the leaf photosynthesis and plant growth of Magnolia sieboldii.

Key words: Magnolia sieboldii, shading, photosynthetic characteristics

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