TITLE:
Effect of Plant Growth Hormones and Liquid Fertilizer on Rooting and Tuberization of Yam (Dioscorea rotundata Poir.) Vine Cuttings
AUTHORS:
Dibi Konan Evrard Brice, Kouakou Amani Michel, Amari Ler-Ogn Dadé Georges Elisée, Brouth Lorng Jean Bernard, Dossou-Aminon Innocent, Essis Brice Sidoine, N’zue Boni, Dick Acka Emmanuel
KEYWORDS:
Yam, Vine Cutting, Yam Seed, Growing Medium, Dioscorea rotundata
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.10 No.10,
October
31,
2019
ABSTRACT: Vine cutting is an effective solution to solve the
problem of seed availability in yam cultivation. This study was conducted to
improve the recovery and rooting rate of vine cuttings of Dioscorea rotundata.
Two-node cuttings from five (5)-month-old
hybrid plants were grown in liquid media consisting of phytohormones (AIA3 and GA3) and liquid fertilizer (NPK 8-8-8) at different
concentrations. Observations were made weekly from the 21st day after transplanting
and focused on the survival rate of the cuttings, the number of roots emitted
and the number of minitubers initiated. The results obtained showed a
significant effect of the different growing media on the survival rate, rooting
and production of minitubers. The best survival rates were obtained for
cuttings grown in NPK (8-8-8) at 0.25% (100%) and AIA3 at 25 ppm
(93.3%). The highest averages root number
was recorded with growing media
containing 0.25% NPK 8-8-8 (20.3) and 25 ppm AIA3 (17.7). Growing
media with 0.25% NPK (8-8-8) and 25 ppm AIA3 provided the highest
average numbers of minitubers initiated, respectively 5 and 4.6. Growing medium
containing 0.25% NPK 8-8-8 has been identified as the one that allows better
roots emission and minitubers production by yam vines cuttings.