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ISHS Acta Horticulturae 1143: VII International Symposium on Edible Alliaceae

Development of onion cropping methods and breeding of short day cultivars for early shipment in Hokkaido, Japan

Authors:   S. Tanaka, M. Nakano, F. Komai, D. Yanagida, M. Iritani, S. Koyano, Y. Shiga, H. Araki
Keywords:   cropping method, early shipment, Japanese cultivar, bolting
DOI:   10.17660/ActaHortic.2016.1143.7
Abstract:
Onion has been grown only by normal spring sown cropping method in Hokkaido. Spring sown cropping method with non-woven fabric sheet was developed in 1994. Autumn sown cropping method for central and southern Hokkaido was developed in 1998. And early spring sown cropping was developed in 1999 for eastern Hokkaido where autumn sown cropping was not suitable, because of hard winter. These cropping methods made onion harvesting and shipping date advance for at least one month as normal cropping. Early harvest end will secure growing period of green manure, as succeeding crop. The new cultivars, 'Shutaro' and 'Sojiro', adapted to early spring sowing, were bred by jointed breeding program.

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