The effects of canopy gaps on seedling emergence and growth of two deciduous broad-leaved species (Cornus controversa andPrunus grayana) in aCryptomeria japonica plantations |
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Authors: | Jiro Kodani |
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Institution: | (1) Ishikawa Forest Experiment Station, 920-2114 Tsurugi, Ishikawa, Japan |
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Abstract: | The effects of canopy gaps on seedling emergence and growth ofCornus controversa andPrunus grayana were studied in a 21-year-oldCryptomeria japonica plantation. The seeds of the two species were sown in December 1995 and their fate was followed until March 2000.P. grayana germinated in 1996, butC. controversa germinated in 1997. In both species studied, more than 70% of the seedlings survived in the forest edge until the end of
the experiment, although none survived in the forest understory in the first growing season. In the gap, the survival rate
was higher inP. grayana than inC. controversa. In this experiment, some trees were cut to enlarge the area of the gap, in which the growth rate increased markedly forC. controversa seedlings, but not forP. grayana seedlings after the cutting. These two species showed substantial differences in the patterns of seedling emergence, survival
and growth in aCr. japonica plantation which had a canopy gap. |
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Keywords: | canopy gap Cornus controversa Cryptomeria japonica plantation Prunus grayana seed-sowing experiment |
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