Effect of Transplanting Densities on Growth, Development, Yield and Quality of Astragalus membranaceus var. mongholicus / 中国实验方剂学杂志

ABSTRACT

Objective:Astragali Radix is an important medicinal and edible herb. To achieve standardized cultivation of Astragali Radix and improve cultivation results, Astragalus membranaceus var. mongholicus was cultivated with a row spacing of 30 cm and different plant spacing (8, 10, 12, 14, 16 cm) in a test base of Longxi County, Gansu Province. Method:The growth and development dynamics of green strains and the yield and quality of medicinal materials were measured, and the comprehensive evaluation of membership function was used to determine the rational transplanting density and explore the standard production technology of A. membranaceus var. mongholicus. Result:The transplanting topping had a significant effect on the growth and development of A. membranaceus var. mongholicus under the condition of the row spacing of 30 cm. With the increase of topping, the biomass of astragalus on the ground decreased, and the ratio of root to shoot increased, but the yield of medicinal material per unit area decreased. The appearance traits were improved as the transplant density decreased. Under the row spacing of 14 cm, the content of astragaloside and calycosin-7-glucoside were the highest. Under the row spacing of 8-16 cm, the content of root extract of Astragali Radix was better than the Chinese Pharmacopoeia standard. The comprehensive evaluation index of each plant spacing treatment was 14 cm>16 cm>10 cm>8 cm>12 cm in turn. Conclusion:Combined with the comprehensive evaluation of yield and economic benefit, the optimal transplanting plant spacing and row spacing were 30 cm×14 cm (with the density of 238 100 strains/hm2). Under this density, A. membranaceus var. mongholicus grows vigorously, with thick stems, big root crowns, a high yield and high quality.