(1) With the variety Kansas of tulip, investigated the effect of the soil temperature after planting on the formation of droppers and the experimental plots were as follows ; it interlaced planting day of September 22th, October 31th and December 10th, covered soil of 7cm and 15cm and irrigation and no-irrigation.
(2) Soil temperature after planting as Fig. 1.
(3) Formation of dropper are accelerated on high soil temperature after planting and can not be found in low soil temperature.