Quality testing quality seedsing and variation test (Codonopsis javanica ((Blume) Hook.F&Thoms) natural distribution in Son La

Abstract

Codonopsis javanica(Blume) Hook.F & Thoms is a vine with medicinal value,
high economic value and conservation significance. Research was carried out within the framework of the scientific research and technological development project
at the ministerial level, the Ministry of Education and Training, code B2019 - TTB
- 03 in Son La province. Seed propagation study was carried out with 4 seed plots
corresponding to 3 collection points (Van Ho district, Song Ma district, Thuan Chau
district and combined point 3). The results show that the fruit diameter is from 1.2
to 1.3 cm, the purity of the seeds is from 88.0 to 91.0%, the average weight of 1,000
seeds is 0.194g, there are from 810 to 893 seeds/fruit. 5,076,142 - 5,208,333 seeds/
kg; germination rate from 7.4 to 7.5 days. Germination rate did not differ significantly between the seed lots and seed samples could be combined in the plots for study.
Seeds germinate from 89.0 - 91.3%, the best seed soaking temperature is 40
o
C. The
best medium for direct sowing of Dang ginseng seeds is 70% topsoil + 20% charred
rice husks + 10% rotting manure. Propagation by tubers gave survival rates from
87.8 to 91.1% and there was no difference between different tuber sizes. After 45
days, the length of the tubers was from 8.9-11.5 cm, the tubers were 1-1.5 cm size
for the best shoot growth. Propagation by stem cuttings is not really suitable, the
survival rate ranges from 23.33 to 63.33%. Highest is NAA drug experiment with
400ppm concentration with 20s drug immersion time. IAA gave the lowest survival
rate, followed by IBA and the highest was NAA.