Effects of Graded Seedling Transplanting on Growth, Yield and Medicinal Materials Quality of Astragalus membranaceus var. Mongholicus

Abstract

Background: Transplantation of Astragalus Mongholicus seedlings, compare the growth and development of astragalus and its yield and quality after graded transplantation, to provide the basis for improving the yield and quality of astragalus medicinal materials. Methods: With the planting of Astragalus Mongholicus seedlings for one year as the material were divided into four grades according to different lengths and thicknesses and the indexes of plant height, thick stem, stem and leaf weight, root length, thick root, yield, Astragaloside IV and Calycosin7-O-β-D-Glucopyranoside content after different seedlings grades were determined. Result: There is a close connection between the grade of Astragalus Mongholicus seedlings and the quality of the yield of medicinal materials. After graded transplantation, the yield of medicinal materials improves 38.52kg/667m2 compared to the traditional transplantation method. The content of Astragaloside IV and Calycosin7-O-b-D-Glucopyranoside is also closely related to the seedling grade, the content of Astragaloside IV in the medicinal materials after transplanting the second and third grade seedlings was more than 0.02% higher than that of the first and fourth grades, after transplantationof the grade I seedlings, the content of Calycosin7-O-b-D-Glucopyranoside in the medicinal materials was more than 0.01% higher than that of the other three grades. The yield of astragalus medicinal materials is the highest after the seedlings are transplanted by grade and the content of the main active components of the medicinal materials is quite different after the different grades of seedlings are transplanted. Therefore, in actual production, the seedlings should be transplanted according to different specifications and grades to improve the yield and quality of astragalus.