[Determination of mineral elements in different part of Astragalus membranaceus(Fisch.) by FAAS].

Having digested the root and shoot of Astragalus membranaceus (Fisch.) with the mixture of nitric acid and perchloride acid (4 : 1) under the condition of the bolling point and the normal pressure, the contents of the five mineral elements necessary to humanity, potassium, copper, zinc, iron and manganese in root and shoot of Astragalus membranaceus (Fisch.) were determined by flame atomic absorption spectroscopy (FAAS), and the results were analyzed in statistics.

[Study on difference of biological characteristics and resistance to powdery mildew of different Astragalus populations].

Objective: To study difference among populations which belong to Astragalus membranaceus and A. membranaceus var. mongholicus on morphology, habit, characteristics of physiology and resistance to powdery mildew, and classify them in order to provide theoretical basis for breeding and improving varieties.