Tree and Forest Health
Online ISSN : 2189-7204
Print ISSN : 1344-0268
ISSN-L : 1344-0268
Volume 5 , Issue 1
Showing 1-5 articles out of 5 articles from the selected issue
Article
  • Ariko Onodera, Daisuke Sakaue, Norihisa Matsushita, Kazuo Suzuki
    2001 Volume 5 Issue 1 Pages 1-11
    Published: March 31, 2001
    Released: September 15, 2020
    JOURNALS FREE ACCESS
    To study the characteristics of big-sized trees, physiological status such as water relations, foliar nutrient concentrations, chlorophyll contents, chlorophyll fluorescence, stem surface temperature and phenology of big-sized trees (girth at breast height 3m over) and middle-sized trees (girth at breast height 1m under) were measured. Observed trees were Ginkgo biloba, Zelkova serrata, Cinnamomum camphora, Liriodendron tulipifera and Castanopsis sieboldii. In all the samples of big-sized trees, the water relations, foliar nutrient concentrations and chlorophyll contents were significantly lower than those of middle-sized trees. SPAD values of big-sized trees were also lower than those of middle-sized trees except for C. sieboldii. The quantum yields of photosystem II calculated from chlorophyll fluorescence of big-sized trees did not differ significantly from those of middle-sized trees. Stem surface temperature of big-sized trees was generally higher than that of middle-sized trees. The time of bud-break and leaf-unfolding varied among species. The earliest leaf coloring, the earliest defoliation, the longest coloring-defoliation period were all observed in big-sized trees. The characteristics of big-sized trees clearly appears in water and nutrient status and phenology.
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