Characteristics of Bud Dormancy and Flowering of Local Almond Varieties Cultivated in Kagoshima

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  • 在来アーモンドの鹿児島県における休眠および開花特性
  • ザイライ アーモンド ノ カゴシマケン ニ オケル キュウミン オヨビ カイカ トクセイ

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Abstract

This study investigated the bud dormancy, flowering period, and flower morphology of four local almond varieties growing in the Toso orchard, Faculty of Agriculture, Kagoshima University. The estimated chilling requirements of these local varieties were 1000 to 1200 hours, which tended to be higher than for foreign cultivated varieties. Their estimated heat requirements were 4800 to 6700 Growing Degree Hours (GDHs). The flowering season depended on the variety, and was mid- to late March in 2017–2018 and mid-March to early April in 2019–2020. Some varieties had a high percentage of imperfect flowers. Our observations suggest that local almond varieties do not have uniform traits, and some of the characteristics differ from those of cultivated varieties. Further research should examine other traits of local and cultivated varieties, such as fruit setting and fruit characteristics.

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