Nghiên cứu ảnh hưởng của thời vụ và mật độ khoảng cách tới năng suất chất lượng hạt giống Đương quy di thực (Angelica acutiloba (Siebold & Zucc.) Kitag)

Abstract

Angelica acutiloba (Siebold & Zucc.) Kitag - Apiaceae is a precious plant that has been used commonly in traditional medicine in Vietnam. After many years of importation, the previously imported varieties were degraded: The rate of flowering plants at the first year was high, the radix Angelicae acutiloba were small and have many rootlets, the productivity and quality radix Angelicae were low. The research results show that the time of sowing Angelicae acutiloba for seeding in Sa Pa is September 15^th (the weight of 1.000 seeds is up to 3,3g; the average number of seeds/ flower is 82.6 seeds/flower); the seed productivity reaching 534,6 kg/ha). The distance of planting Angelicae acutiloba 30 x 30 cm gives a seed productivity of 448,8 kg/ha.