Astragalus Nutritional Characteristics And Nutrient Status Of Total Flavonoids And Polysaccharides

The nutritional characteristics and the relations of nutrient status with the total flavonoid and polysaccharide were studied in Radix Astragali1,Seasonal Changes of Contents of nitrogen(N), phosphorus(P), potassium(K), Calcium(Ca), magnesium(Mg), Iron (Fe), manganese (Mn) , copper (Cu) and zinc (Zn) in above-ground organs and below-ground organs of Radix Astragali。 Changes of Contents of N, P and K was decided by the mobile of elements and the biological characteristics.with the development of season, N, P and K elemental contents was decline , then increased and decreased at the subsequent. The contents of trace elements and mesne elements changed gently in the growing season.Changes of Contents of N, P and K was decided by the biological characteristics. With the changes in the growing season, N and P elemental content reduced at first, increased gentle in the middle of period and rise sharply at the subsequent. The content of K decreased at the initial period and that was stable relatively at subsequent. The contents of trace elements and mesne elements in below-ground organs showed a slight increase in growth, but little fluctuations.2, The relation with the N, P, K contents and the total flavonoid and polysaccharide contents in Radix Astragali root at the growing period. N and P contents was the same trends at different period of root. The contents of N and P were higher at the neither period, decreased sharply in because nutrition, increased gentle from the reproductive season to the fruiting , increased sharply at wither period. K content charged stable relatively. The trend of the total flavonoid and polysaccharide was the same of N and P. Relevant analysis shows that the contents of N, P and the total flavonoid and polysaccharide contents were related positive separately, the contents of K and the total flavonoid and polysaccharide contents were related negative in Radix Astragali root .3,Remarkable effect of the content the total flavonoid and polysaccharide in Radix Astragali root at the different period, the total flavonoid and polysaccharide content were significant differences at the different harvest periods. Effective ingredients were higher in November, the total the total flavonoid and polysaccharide contents were 3. 385(mg/g)and 54. 348(mg/g). So the best harvest time of Radix Astragali is in November.4,The relation with growth environment and the total flavonoid and polysaccharide contents in Radix Astragali root. Effective ingredients content differences are considerable in Radix Astragali, the total flavonoid content of different origin Astragalus membranaceus ( Fisch. ) Bge. var. mongholicus (Bge.) Hsiao was Hebei>Heilongjiang>Shanxi>...