1) Respiration of thlip bulbs during storage decreased gradually with the falling of storage temnperature（30゜, 25゜, and 20℃).
2) Small tulip bulbs showed higher respiration than large ones and apparent differences were also found among the varieties examined. Then the respiration of tulip bulbs increased remarkably with the increasing area of tears in their outer corky skin.
3) Before entering low temperature storeroom, tulip bulbs showed 2270 Kcal/t 24hr of respiratory heat.
Under constant temperature of 20℃, tulip bulbs showed 1375～2350 Kcal/t 24hr.