サンダーソニアの開花および新塊茎の肥大に及ぼす母塊茎の切断程度の影響(繁殖・育苗)  [in Japanese] Effects of Excision of Mother Tuber on Flowering and Growth of Daughter Tubers in Sandersonia : Sandersonia aurantiaca Hook.(Propagation & Transplant Production)  [in Japanese]

サンダーソニアの母塊茎の切除程度が開花および新塊茎の肥大に及ぼす影響を検討した.葉数や草丈の増加は切除程度が大きいと劣り,同時に開花数は著しく少なくなった.発蕾日数および到花日数は切除程度が大きいと増加した.新塊茎の肥大のうち,新塊茎の長さは処理区間で差がみられなかったが,最大塊茎径は切除程度の小さいものほど大きい値を示した.新塊茎重は切除程度が小さいほど大きく,無処理で最も大となり,1/4残存区はその1/2の重さとなったが,肥大部除去と1/2残存区の新塊茎重は無処理区と大差が認められなかった.以上の結果,植え付け時における母塊茎の切断は軽度であっても開花に悪影響を及にすが,新塊茎の肥大に関しては軽度の切断は許容されるものと考えられた.

Effects of the excision of mother tuber on flowering and growth of daughter tubers of Sandersonia aurantiaca plants were investigated. By large excision of the mother tuber, the numbers of leaves and stem elongation were retarded and the numbers of flowers were decreased. The number of days to flower budding and the number of days to flowering were increased by large excision of the mother tuber. The length of normal fmgerlike or fork shaped daughter tubers was not affected by excision of the mother tuber. The maximum diameter of daughter tubers was larger when excision of the mother tuber was smaller. The fresh weight of daughter tubers was larger when excision of the mother tuber was smaller, and was the greatest without removal (control), intermediate at removal of the enlarged stem base, leaving 1/2 remaining, and the smallest when only 1/4 was left remaining. The fresh weight of daughter tubers at 1/4 remaining treatment was about 50% of the control. It was concluded that flowering of Sandersonia is adversely affected by slight excision of the mother tuber at planting, while slight excision of the mother tuber hardly affect enlargement of the daughter tubers.