KADOMATSU Masahiko Hokkaido Univ., Agriculture, Assistant Professor, 農学部, 助手 (60158847)
ANDO Makoto Kyoto Univ., Agriculture, Associate Professor, 農学部, 助教授 (00133132)
FUJIMOTO Seiji Shizuoka Univ., Agriculture, Associate Professor, 農学部, 助教授 (00113621)
UCHIDA Koji Tsukuba Univ., Agriculture, Associate Professor, 農林学系, 助教授 (10015670)
TSUKAHARA Hatsuo Yamagata Univ., Agriculture, Professor, 農学部, 教授 (30007083)
Phenology of adult trees had been investigated for three years (1996 - 1998) at 11 study sites, 9 university forestsﾟCin total. And provenance test Sites were established at each university forests with seeds taken from mother treesﾟCselected from the adult trees in each university forests. The phenological characteristics had been surveyed on seedlingsﾟCin provenance test sites. The study contents in detail were as follows.
1. Phenology of adult trees Timing of flushing, flowering, and amount of leaf, flower and acorn on tree crown byﾟCeye measurement. And litter traps were set under investigated trees for measurement of defoliation, fallen flowersﾟCand fallen acorns. For analysis between the phenological timing and environment condition, air temperature underﾟCthe crown was measured.
2. Establishment of provenance test sites : Provenance test sites were established with seeds of Quercus mongolica var. grosseserrata, Quercus serrata, and Quercus acutissima at Hokkaido Univ. (Uryu and Nakagawa), Yamagata Univ. (Kaminagawa), Tsukuba Univ. (Yatsugatake), Univ. of Tokyo (Hokkaido and Chichibu), Tokyo Univ. of Agric. and Tech. (Karasawayama, Ohtaniyama, Kusaki and Saitama), Shizuoka Univ. (Kamiatago), Kyoto Univ. (Kamigamo), Tottori Univ. (Hiruzen) and Kyushu Univ. (Fukuoka).
3. Phenology of seedlings in provenance test sites Timing of germination and amount and number of leaves of seedlings were surveyed in each provenance test site. Change in leaf color from summer to autumn before defoliation measured by SPAD meter (Minolta SPAD-502). For analysis between the phenological timing and environment condition, air temperature in provenance test sites was measured.
Above these measurements, phenological characteristics were compared among adult trees and provenance. The most important factor was accumulated temperature, and longitudinal difference among study sites slightly affected on timing of phenological change.