サジオモダカAlisma orientaleの栽培に関する研究（第3報）西表島における水田栽培について

抄録

On Iriomote Island, Okinawa Pref., Japan, we conducted cultivation experiments for Alisma orientale. The seeds were sown on cell trays containing field soil on Jul. 17 (plot I-7.17), Aug. 12 in 2013 (plot I-8.12) and Sep. 16, 2014 (plot I-2015), and developed to juvenile plants to be settled. On Oct. 4 (plot I-7.17) and Oct. 30 in 2013 (plot I-8.12), we settled juvenile plants in 1/2000a Wagner pots containing field soil, and then cultivated them for 3 months until harvest. The mature plants bearing scapes numbered 5 out of 10 individuals at plot I-7.17; however, no scapes were formed at plot I-8.12. On Dec. 24, 2014 (plot I-2015), 300 juvenile plants were planted in the paddy field, and cultivated for 4 months until harvest. None of the mature plants at plot I-2015 formed scape, and a large oval rhizome was harvested. The processed rhizomes after harvesting were similar to those of Alisma Tuber (沢瀉) imported from China in morphology, and contained alisol A, alisol B and alisol B monoacetate.