Influence of ventilation
and media on potato (Solanum tuberosum L.)
tuberization and its growth characteristics
Saeid Hassanzadeh Mobini1*, Mohd Razi Ismail2
and Hossein Arouiee3
and Plant Improvement Institute, Khorasan Agricultural and
Natural Resource Research Center, Iran.
of Crop Science, Faculty of Agriculture, University Putra
of Horticultural Science, Faculty of Agriculture, Ferdowsi
University of Mashhad, Iran.
*Corresponding author. E-mail:
16 March, 2009
Considering the most suitable relationship between
ventilation and media in this study, two mixtures of perlite
and coir (3:1, light and 1:3, heavy v/v) were applied to
determine the growth characteristics var. Sante of
potato plantlets. As potato has high potential in minituber
production, different levels of supplemental aeration
(0, 12.5, 25 and 75%, v/v/min) were compared for providing
root oxygen demand and increasing potato minituber yield.
Applying sufficient aeration led to significant increase in
dry matter, number, size, quality of minituber and most of
the growth parameters such as leaf area index (LAI), leaf
area index duration (LAID), harvest index (HI) and root :
shoot ratio. The results showed that by applying
aeration at 25% (v/v/min), tuber yield was increased
significantly up to 162% and increase in tuber number was
predominant at the rate of 3678 tuber/m2.
Desirable performance of aerated plant can be resulted from
root oxygen demand of potato which is higher than normal
ventilation in media. Heavy media was more responsive to
aeration than light one. Thus, aeration at 25 and 12.5%
(v/v/min) in heavy and light media respectively was
considered as favorable level in rizo-sphere and had
positive effect on tuberization.
Aeration, air-filled porosity, container system,
media, oxygen deficiency, seed potato production.