Research unsexual multiplication of the Dioscorea collettii Hook.f. from root

Abstract

Research on the unsexual propagation of Dioscorea collettii Hook.f. in the nursery in Lai Chau province shows that: Using the middle section of the tuber with a size of 3 x 5 cm, cuttings carried out in January had a survival rate of 81.3%, while the survival rate in the field was 96.6%, multiplication coefficient of 12.08. NAA, applied at a concentration of 500 ppm for 60 seconds, shortened the plant growth period by 15 days compared to the control formula. The survival rate in the nursery was 93.3%, and the survival rate after planting exceeded 98.3%. Seedlings propagated in a medium of burnt rice husk and sand (volume ratio 1: 1) exhibited optimal growth and development, achieving a survival rate of 81.7% in the nursery and 97.6% after planting. Seedlings grown in the nursery for 90 days met cultivation standards, reaching a height of 42.6 cm with five leaves. The rate of successful transplantation and survival in the field exceeded 95%.