Differences in growth responses between Cryptomeria japonica and Chamaecyparis obtusa planted in group selection openings in Kyushu, southern Japan

Kazuki Ito, Tetsuji Ota, Nobuya Mizoue, Shigejiro Yoshida, Kotaro Sakuta, Akio Inoue, Satoshi Ito, Hiroyuki Okada

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We quantified the differences in growth responses between Cryptomeria japonica and Chamaecyparis obtusa trees in approximately 0.1-ha group selection openings in southern Japan. We measured the position, height (H), and diameter at ground level (D) of 6- and 13-year-old C. japonica and C. obtusa trees that were planted in two respective openings. The annual H and D growth of C. japonica increased until trees were 10 and 8 m, respectively, distant from the nearest edge of the opening. For C. obtusa, the annual H and D growth increased slightly until the trees were 6 m distant from the nearest edge, but they did not significantly differ between 6 and 18 m distant from the nearest edge. While the shortest distance from the edge explained 63% and 50% of the variationsal H and D growth, respectively, of C. obtusa. Our result demonstrates that C. obtusa is less sensitive to edge effects than C. japonica. We conclude that C. obtusa is likely to be more suitable than C. japonica for planting within 0.1-ha group openings, as it will result in faster early stage growth, with less variation, within the openings.

Original languageEnglish
Pages (from-to)126-130
Number of pages5
JournalJournal of Forest Research
Volume22
Issue number2
DOIs
Publication statusPublished - Feb 7 2017

All Science Journal Classification (ASJC) codes

  • Forestry

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