Scientific Reports of the Faculty of Agriculture, Okayama University
Published by the Faculty of Agriculture, Okayama University
ONLINE ISSN : 2186-7755

積算温度によるブドウの芽の休眠完了予測

久保田 尚浩 応用植物科学コース
ポジャナピモン チャイワット 応用植物科学コース
福田 文夫 応用植物科学コース
藤井 雄一郎 岡山県農業総合センター農業試験場
小野 俊朗 岡山県農業総合センター農業試験場
倉藤 祐輝 岡山県農業総合センター農業試験場
尾頃 敦郎 岡山県農業総合センター農業試験場
功刀 幸博 山梨県果樹試験場
小林 和司 山梨県果樹試験場
茂原 泉 長野県中信農業試験場
山下 裕之 長野県中信農業試験場
藤島 宏之 福岡県農業総合試験場
抄録
 This study was conducted to investigate the relationship between completion of dormancy of grapevine bud and temperature. Canes of ‘Kyoho’ and ‘Pione’ grapevines (Vitis labrusca×V. vinifera) grown in 7 vineyards with different temperature conditions, in Nagano, Northern Okayama, Yamanashi, Okayama, Okayama University, Fukuoka and Miyazaki, were collected at three different chilling exposures, December, January and February. These were then sent to Okayama University all at the same time. Cuttings with one bud were put into growth chambers kept at 25 or 30°C with 14 hours daylength, and budbreak in each cutting was surveyed at two day intervals for 60 days. Cumulative chilling hours (CCH) of exposure to below 7.2°C in each treatment time was largest in Nagano, followed in order by Northern Okayama, Yamanashi, Okayama, Okayama University, Fukuoka and Miyazaki. The CCH in Nagano was 2.5 to 4.8 times larger than in Miyazaki depending on the treatment time. The later the treatment time and the higher the temperature, the fewer were the number of days to first budbreak (NDFB) after treatment, irrespective of cultivar. A similar trend was observed in the number of days to 60% budbreak. In ‘Kyoho’ the NDFB was short in Nagano, Okayama University and Miyazaki, and longer in Okayama, Yamanashi and Fukuoka. In ‘Pione’ the NDFB was short in Fukuoka and Okayama University, and longer in Yamanashi and Okayama. The result was a weak negative correlation observed between CCH and NDFB in 4 of 7 vineyards. However, there was a strong positive correlation between NDFB and cumulative temperature (CT), a summation of temperature and hours of exposure to above 0°C from November 1 to treatment time and hours of exposure to 25 or 30°C from start of treatment to budbreak in each plot, in 6 vineyards excluding Miyazaki. The importance of estimating the completion of dormancy in grapevine bud based on CT is discussed.
キーワード
budbreak
chilling exposure
growing region
temperature condition
Vitis labrusca × V. vinifera
ISSN
0474-0254 
NCID
AN00033029