@article{oai:niigata-u.repo.nii.ac.jp:00028410, author = {Khuankaew, Thiraporn and Ohyama, Takuji and Ruamrungsri, Soraya}, issue = {2}, journal = {新潟大学農学部研究報告, 新潟大学農学部研究報告}, month = {Mar}, note = {A rhizome of Curcuma alismatifolia Gagnep. was cultivated in a pot using soil, sand, rice husk and rice husk charcoal mixed at the ratio of 1:1:1:1 by volume. The experiment was conducted to study growth and development of plants when 100 ml of GA3 solution (100 mgL-1) was applied by drenching to soil at different growth stages, i.e., shoot emergence stage, 1st-leaf unfolding stage, 2nd-leaf unfolding stage and 3rd-leaf unfolding stage compared with control plants supplied with distilled water. The results showed that the GA3 application at later stage tended to increase plant height and scape length but decreased the fresh weight of shoot, inflorescence and rhizome per cluster. The flowering date was delayed by GA3 application. The control plants flowered at 103 days after planting. The flowering date was most delayed at 114 days after planting, when GA3 solution was supplied at 3rd-leaf unfolding stage. The concentrations of nutrient (NPK) were analyzed in the underground organs and aboveground organs at flowering stage (15-16 WAP). The GA3 application at different growing stages had effects on nutrient concentrations in the aboveground parts. When GA3 solution was supplied at 3rd-leaf unfolding stage, the N, P and K concentrations were the lowest compared with the application at other stages. However, the GA3 application in all treatments had no effect on N, P and K concentrations in underground organs.クルクマ・アリスマティフォリアGagnepの塊茎を土壌:砂:モミ殻:炭化モミ殻(体積当たり1:1:1:1)の培地を入れたポットで栽培した。本実験では、ジベレリン(GA3)の施用時期(第一葉展開期、第二葉展開期、第三葉展開期)がクルクマの生長と分化に及ぼす効果を調べた。GA3水溶液(100mg L-1)を各ポット当たり100mL土壌に添加した。対照区では、蒸留水を100mL添加した。GA3を生育後期に与えた区では、草丈と花茎が増加したが、茎葉部、花序、塊茎の生体重が低下した。また、GA3の添加で開花時期が遅くなった。対照区では、植え込み後、102.6日で開花したが、第三葉展開期にGA3を添加した区では、開花日数は113.6日と遅くなった。開花期(植え込み15-16週間後)における地上部、地下部各器官の、窒素、カリウム、リン濃度と株当たり含有量を測定した。GA3施用は、施用時期に係らず、地上部の養分濃度に影響を与えた。特に、第三葉展開期に投与した区では、N, P,K濃度とも最も低下した。しかしながら、GA3施用は、地下部のN, P, K養分濃度には影響を与えなかった。}, pages = {141--145}, title = {Effects of Gibberellin Application at Different Growing Stages on Growth and Development of Curcuma alismatifolia Gapnep.}, volume = {60}, year = {2008} }