短日處理에 따른 大豆生育反應의 品種間 差異

Varietal Differences in Response of Shortday Treatment on Growth and Development of Soybeans

This study was conducted to examine the response of daylength on the growth and development of soybean plant. Soybean varieties such as Seocheonbaikdu, Danyubkong, and Baikcheon were tested. The most effective time and or period of short day treatment for shortening days from seeding to flowering (DSF) was from emergence to flowering. Short day treatment (SDT) period which most effectively shorten days from flowering to maturity was from 15 days after emergence to flowering or maturing in Seocheonbaikdu, from 45 days after emergence to maturity in both Danyubkong and Baikcheon. Shortday treatment which most effectively shorten the days from seeding to maturity was the short day treatment from emergence to maturing. In general, the effects of SDT was well demonstrated by the earlier SDT and the longer SDT period in most characters. Shortday treatment for 15 days was seemingly insufficient to transit plants to reproductive phase, otherwise the natural daylength, possibly longday could be a factor interfering phasal transition.