Climate Change Adaptation Information Platform(A-PLAT)
パソコンの検索マーク
携帯の検索マーク

CImproving the Coloration of Aki Queen Grapes

Publication date July 25, 2018
Sector Agriculture, Forestry, Fisheries
Region name Chugoku-Shikoku(Hiroshima Prefecture)

Climate change impacts

In the coastal region of Setouchi, the temperature during maturation is high, and grape coloration tends to be poor. This is particularly notable in the red variety "Aki Queen". The price of grapes with weak skin coloration drops dramatically even if the taste is unaffected. As a consequence of global warming, it is possible that areas of cultivation that have so far been unaffected by this issue, may develop this problem in the future. Although it has long been known that cincturing (i.e., selective bark removal) improves coloration, this may not be effective as temperatures rise.

Adaptation activity

A combination of cincturing and crop thinning has been explored in Hiroshima Prefecture, as a method of improving the coloration of grapes in warm climates.

環状はく皮と着果量の軽減を組み合わせた効果の様子
Fig. 1 Results of combined crop thinning and cincturing.
(Source: Hiroshima Prefectural Technology Research Institute, Agriculture Research Center, “Methods for Improving "Aki Queen" Grape Coloration in the Setouchi Coastal Region”)
幹の皮部を環状に剥ぎ取った様子
Fig. 2 Appearance of vine after annual cincturing.
(Source: “Methods of Increasing Grape Coloration in Warm Climates by Combining Cincturing and Crop Thinning”, Hiroshima Prefectural Technology Research Institute, Agriculture Research Center)
Sources and Related Information
“Methods of Increasing Grape Coloration in Warm Climates by Combining Cincturing and Crop Thinning”, Hiroshima Prefectural Technology Research Institute, Agriculture Research Center
https://www.pref.hiroshima.lg.jp/uploaded/attachment/5052.pdf
Hiroshima Prefectural Technology Research Institute, Agriculture Research Center, “Methods for Improving "Aki Queen" Grape Coloration in the Setouchi Coastal Region”
https://www.pref.hiroshima.lg.jp/soshiki_file/kouhou/oldsrv/1212725883363/files/12345.pdf
Ministry of the Environment "STOP THE warming 2017"
https://www.env.go.jp/earth/ondanka/knowledge/Stop2017.pdf