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(8)盲花与低温春化种球必须经过低温春化后,才能开花或进行促成栽培。一般品种在5℃下7周即可解除休眠。若种植后叶向横展开,发育迟缓,表示低温春化不足。反之,叶直立而细,植株有徒长的样子,花药枯死或消失,表示低温过度。因此,栽培者必须因品种而异摸索出最佳的低温春化天数。 (9)种球退化原因病毒病、连作、不适宜的种植
(8) blind and low temperature vernalization bulbs must be low temperature vernalization in order to blossom or to promote cultivation. General varieties at 5 ℃ for 7 weeks to lift dormancy. If the leaves after planting to the transverse expansion, growth retardation, that lack of low temperature vernalization. On the contrary, the leaves stand upright and thin, the plant has a benign appearance, the anthers die or disappear, indicating that the hypothermia is excessive. Therefore, the cultivator must find the best low-temperature vernalization days for different varieties. (9) the reasons for the degradation of bulbs virus disease, continuous cropping, inappropriate planting