Mojtaba et al
Greener Journal of Agricultural Sciences Vol. 2 (6), pp. 269-278, October 2012
Manuscript Number: 09141260
The Effect of N-NH4/NT Ratios, Spraying Intervals of Nutrient Solution and Light in Root Media on Macro Elements Uptake and Vegetative Traits of Gerbera in Aeroponic Culture
Mojtaba Afzali Pour Fereidouni*, Mohsen kafi, Mesbah Babalar, Reza Fatahi, and Hamed Balanian
Department of Horticultural Sciences, College of Agriculture, University of Tehran, Karaj, Iran
*Corresponding Author’s Email: mafzalipour @ yahoo. com
This study was carried out in order to
consider aeroponic potential, the effects of four N-NH4+/NT
ratio including control (without N-NH4+), 0.03, 0.08, 0.16,
spraying intervals of nutrient solution including either
three minutes spraying-fifteen minutes off or three minutes
spraying-thirty minutes off and darkness or light in root
media on macro elements uptake and vegetative traits of
Gerbera. The nutrient solution was analyzed after 45 days
for some criteria including: amount of nitrogen, phosphorus,
potassium, calcium and magnesium as well as root length in
15 days intervals (three periods), final root length and
leaf number. According to the results root length in second
and third periods and final root, were significantly higher
in nutrient solution containing N-NH4+/NT ratio 0.03 while
the maximum leaf number was observed in nutrient solution
containing N-NH4+/NT ratio 0.16, 0.03 and 0.08 respectively.
Nitrogen uptake increased in control nutrient solution and
in nutrient solution containing N-NH4+/NT ratio 0.03.
Phosphorus, potassium and magnesium absorbed higher in
nutrient solution containing N-NH4+/NT ratio 0.03, 0.16 and
0.16 respectively. Root length in all three periods, final
root length and phosphorus uptake were significantly higher
in three minutes spraying-fifteen minutes off treatment,
while leaf number and potassium uptake were higher in three
minutes spraying-thirty minutes off. Light condition in root
media had a significant effect on root length in the first
and the third periods as well as the uptake of all elements
that measured in this study. Root showed higher growth, in
first period in light condition and in third period in
Keywords: Aeroponic; Gerbera; N-NH4+/NT ratio; Nutrient solution
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