生物と気象
Online ISSN : 2185-7954
Print ISSN : 1346-5368
ISSN-L : 2185-7954
研究論文
北海道十勝地方におけるワイン用ブドウ3品種の品質と単収およびビンテージ評価に及ぼす栽培前年と当年の気象条件の影響
西尾 善太東 億下田 星児広田 知良
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ジャーナル フリー

2021 年 21 巻 p. 65-73

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 The wine grapes of Tokachi wine are produced at Ikeda in eastern Hokkaido, where the daily minimum air temperature drops below -20℃ during winter. In this study, we investigated the impact of the previous and current year’s climate conditions (air temperature, precipitations, and sunshine hours) on the fruit quality (Brix, acidity), yield of grapes and Tokachi wine’s vintage evaluation using three varieties ‘Kiyomi’, ‘Kiyomai’, and ‘Yamasachi’ from 1995 to 2016. ‘Kiyomi’ is a clonal selection of the French-derived ‘Seibel 13053’, while ‘Kiyomai’ and ‘Yamasachi’ are cold hardy hybrids derived from crosses of ‘Kiyomi’ and Vitis amurensis. The mean temperature from April to September and rainfall from August to September showed significant positive and negative correlations with the vintage evaluation in Ikeda, respectively, as well as in Bordeaux, France. Brix value of “Kiyomi” was positively correlated with sunshine hours in August and September of the growing year, while its acidity was negatively correlated with the average daily maximum temperature of June and average high temperature of September of the growing year. On the other hand, the Brix value and acidity of ‘Kiyomai’ and ‘Yamasachi’ were strongly influenced by the climatic conditions of the previous year as well as the growing year. Acidity of ‘Kiyomai’ was negatively correlated with the average temperature in June and November of the previous year, while Brix value of ‘Yamasachi’ was positively correlated with the sunshine hours in July of the previous year. In cold regions such as Ikeda, recent global warming has been considered to have a positive effect on agricultural production. However, this study shows that not all conditions associated with warming are positive for Ikeda’s grapes and Tokachi wine.

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© 2021 The Society of Agricultural Meteorology of Japan
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