2025 Volume 24 Issue 1 Pages 63-71
We analyzed the data obtained from experiments performed on the cool-type garlic cultivar ‘Fukuchi White’ from 2011 to 2021 in the Kamikita region of Aomori Prefecture, Japan using transparent multi-cultivation. Garlic growing periods were identified and classified based on the beginning and end of snow cover and developmental stages. In the early growth stage (between planting and beginning of snow cover), on November 20th, growth tended to be poor and the sprouting time was delayed; however, the effect on yield was small. Growth changes were investigated based on the scale differentiation stage (SDS) after the snow disappearance date (SDD). In the middle growth stage (between SDD and SDS) and early period of bulb enlargement [between SDS and flag leaf emergence stage (FLES)], the difference in aboveground growth (plant height, leaf sheath diameter, number of green leaves, and total weight) between high- and low-yield years was small. The difference in growth between high- and low-yield years was relatively high in the late period of bulb enlargement [between FLES and the harvest stage (HS)]. After FLES, the foliage weight peaked higher and later, and the decrease in foliage weight was smaller in high-yield than low-yield years. The proportion of foliage weight to total weight in high-yield years was large. Therefore, it is considered necessary to increase and maintain foliage up to HS to increase yield. SDS was early in high-yield years, bulb enlargement started late, and fresh bulb weight increased rapidly 50 days after SDS.
