肉苁蓉营养元素分配特征研究

Distribution of Nitrogen,Phosphorus,Potassium,Calcium and Magnesium in Cistanche deserticola

目的研究肉苁蓉生殖生长期营养元素的分配规律。方法采收生殖生长期肉苁蓉样品,分别对生殖器官和营养器官的营养元素含量进行分析,其中K、Mg、P、Ca元素采用ICP-AES法测定,N元素采用凯氏定氮法测定。结果随着生殖生长期的延长,肉苁蓉不同部位营养元素积累高峰期有差异,N元素含量在出土期的花序中最高,K元素含量在果期的花序中最高,Mg、Ca元素含量在果期的肉质茎下部中最高,P元素含量在初花期的花序中最高。结论肉苁蓉进入生殖期后,营养元素逐渐由营养器官向生殖器官转移,各部位营养元素含量差异程度不同。

OBJECTIVE To investigate the accumulation and distribution of some nutrient elements, i.e. N, P, K, Ca and Mg in Cistanche deserticola in reproductive stage. METHODS The nutrient elements contents in samples at different reproductive stages were determined. P, K, Ca, and Mg were determined by ICP-AES, and N was determined by Kjeldahl method. RFSULTS The peak accumulation time of the nutrient elements was different in different parts. The content of N was the highest in inflorescence at coming-up stage. The content of K was the highest in inflorescence at fruit stage. The contents of Ca and Mg were the highest in lower stem at fruit stage. And the content of P was the highest in inflorescence at initial flowering stage. CONCLUSION The nutrient elements gradually metastasize from nutrient organs to reproductive organs during reproductive stages. The contents of nutrient elements in different parts varied at different degrees.