@article{oai:repository.naro.go.jp:00001384, author = {加藤, 明 and KATO, Akira}, journal = {北海道農業研究センター研究報告, Research BUlletin of the NARO Hokkaido Agricultural Research Center}, month = {Mar}, note = {A method for estimation of cool weather tolerance of rice at the booting stage that can be carried out in a greenhouse has been developed. According to the established field-test method, rice plants were cultivated in a deep cool-water condition at 18-19℃ in a greenhouse from the beginning of panicle differentiation to the end of heading of all plants. The order of spikelet fertility (%) of nine different varieties was the same as the known degrees of cool weather tolerance of the nine varieties at the booting stage. The relationship between spikelet fertility and water temperature in the deep cool-water condition is almost the same as to that between spikelet fertility and air temperature in the rice field in 1993, when spikelet fertility in Hokkaido ranged from 0.3% to 71.3% in Hokkaido due to a long cool summer. The present method can be used for evaluation of cool weather tolerance of rice varieties at the booting stage in all seasons except for spring, when rapid increase of day length may affect floral development of rice.}, pages = {1--231}, title = {温室での深水冷水栽培による水稲の穂ばらみ期耐冷性の検定}, volume = {189}, year = {2008}, yomi = {カトウ, アキラ} }