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cje ›› 2004, Vol. ›› Issue (3): 1-5.

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Photosynthetic ecophysiological characteristics of Lithocarpus harlandii in Tiantai Mountain of Zhejiang Province,China

KE Shisheng, JIN Zexin, LIN Hengqin, ZHANG Wenbiao   

  1. Department of Biology, Taizhou University, Linhai, Zhejiang 317000 China
  • Received:2003-02-07 Revised:2003-06-16 Online:2004-06-10

Abstract: The photosynthetic ecophysiological characteristics of Lithocarpus harlandii at the three habitats,i.e,canopy gap,forest edge and understory,was studied.In clear days,the curves of diurnal variations of net photosynthetic rates (Pn) of L.harlandii had two peaks at canopy gap and forest edge in Jun.,Aug. or Nov.,while the curves had one peak in Feb.In Aug,L.harlandii had the highest Pn in a year because of mature leaves,high chlorophyll contents,strong nitrate reductase activity,superior water and heat environment,and strong light.L.harlandii had the lowest light compensation points (LCPs) and the highest light saturation points (LSPs) in Aug. than in other months.L.harlandii had lower LCPs,higher LSPs,and wider ecological ranges of photo-adaptability. The higher Pn of L.harlandii than its accompanying species indicated that higher photosynthetic capacity mad it in a favourable position to get dominating status for occupying the community space.

Key words: Bemisia tabaci, Natural population, Life table, Index of population development trend, Exclusion index of population control

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