Growth analysis ofQuercus serrata seedlings withinMiscanthus sinensis grass canopies differing in light availability |
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Authors: | Yanhong Tang Izumi Washitani Takayoshi Tsuchiya Hideo Iwaki |
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Affiliation: | (1) Institute of Biological Sciences, University of Tsukuba, 305 Tsukuba, Ibaraki, Japan;(2) Institute of Biological Sciences, University of Tsukuba, 305 Tsukuba, Ibaraki, Japan;(3) Institute of Biological Sciences, University of Tsukuba, 305 Tsukuba, Ibaraki, Japan;(4) Institute of Biological Sciences, University of Tsukuba, 305 Tsukuba, Ibaraki, Japan;(5) Present address: Department of Biology, Faculty of Science, Chiba University, 260 Chiba, Japan |
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Abstract: | The effects of different light regimes on the survival, growth and morphology ofQuercus serrata seedlings were studied in canopies ofMiscanthus sinensis. The seedlings of various ages (0–3 yr) were grown in three light regimes: under a denseM. sinensis canopy (TG plot) receiving 2.5%–8.7% of full sunlight, under a relatively sparse canopy (SG plot) receiving 3.8%–16.1% of light and in an adjacent open site (NG plot). There was a little difference in the survival ofQ. serrata seedlings among the three plots. Height and diameter of stem and total leaf area of the seedlings were significantly lower in the shadier plots. However, the first (bottom) flush of the stem was significantly longer in the TG plot than in the NG and SG plots. Total dry weights of individual 1- and 2-yr-oldQ. serrata seedlings in the TG plot were reduced to about one-twelfth of those in the NG plot. Although the relative proportion in dry weight of each organ did not differ significantly among the plots, leaf area ratio, specific leaf area and stem height per unit dry weight were significantly higher in shadier plots. The leaf area per unit stem height was increased considerably in the sunnier plots. |
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Keywords: | Grassland Light availability Miscanthus sinensis Quercus serrata Seedling establishment |
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