兰州百合发育过程中植株及鳞茎内氮磷钾的吸收与分配

以兰州百合为试材，研究了植株及鳞茎发育过程中各个器官的营养吸收与分配。结果表明：鳞茎萌发阶段，母鳞茎贮存的营养元素主要用于新生茎、叶的生长发育，幼苗期，氮、磷、钾主要分配在母鳞茎、叶片和茎秆中。随着光合器官逐渐成熟，叶片中的分配比率增大。现蕾期至开花期，是氮、磷、钾分配中心由百合地上部分转向鳞茎的转折时期。植株营养吸收的关键时期为幼苗至现蕾期，鳞茎发育对钾营养的需求大于氮和磷。

Absorption and Distribution of Nitrogen, Phosphorus, Potassium Element in Plant and Bulb during Lilium davidii Development

Absorption and distribution of nutrition element in various organs of Lilium davidii var. unicolor was studied during plant and bulb development. The results indicated that nutrition element stored in mother bulb was consumed for growth of new leaves and stem at bulb germination stage. At plantlet stage, the Nitrogen, Phosphorus, Potassium element was distributed in mother bulb, leaves and stem mostly. Percentage of nutrition in leaves increased with the grown up of photosynthesis organs. From visible bud to anthesis was turning stage that the distribution centres of nutrition element from overground parts to bulb. The key period of element absorption was plantlet to visible bud stage. Potassium was more important than Nitrogen and Phosphorus for development of bulb.