[Effects of Different Altitudes and Sowing Dates on Direct Sowing Angelica sinensis Yield and Quality].

Objective: To study the effects of different altitudes and sowing dates on direct sowing Angelica sinensis biomass, yield and quality, and to provide a theoretical basis for Angelica sinensis direct sowing cultivation techniques.

Methods: Two factors trials were used to research the influence of altitude and sowing dates on yield and quality of direct sowing Angelica sinensis. The altitudes were located at 2500, 2000 and 1500 m, and the sowing dates were set up at autumn August 29, and Spring April 3 and April 24.