钾对番红花球茎膨大的生理生态效应

名贵中药番红花球茎的大小是决定其入药器官—柱头多少的关键，用4个不同K水平的营养液培养番红花，结果表明，随着施钾水平的提高，叶片中的钾含量、叶绿素含量、ATP相对含量及叶片净光合速率也相应提高，使得叶片作为“代谢源”的能力加强．随着施钾水平提高，新球茎富集钾的能力、可溶性糖含量、Vc含量和蛋白质含量也增加，致使新球茎作为“代谢库”的功能也增强，球茎膨大速率加快，本文对钾元素通过加强“源”和“库”的功能来提高番红花球茎膨大速率的机理进行探讨，为番红花的进一步研究与利用提供了新的依据。

Physiological and ecological effects of potassium on expansion of crocus corm

The corm size of Crocus sativus, a well-known medicine, is a key limiting factor for its stigma harvest. A water cultural experiment with four different potassium (K) concentrations showed that the K content, chlorophyll content, relative ATP content and net photosynthetic rate in C. sativus leaves increased with improving K concentration, which enhanced the function of leaves to be metabolic source. On the other hand, the K absorbing ability and the contents of soluble sugars, vitamin C (Vc) and protein in new-born corms were increased with improving K concentration, which also strengthened the function of new-born corms to be metabolic sink. This study also showed that K could promote the new-born corm growth rate of C. sativus through strengthening the function of "source" and "sink".