THE EFFECTS OF GIBBERELLIC ACID (GA3), INDOLE ACETIC ACID (IAA) AND KINETIN (K) AND THEIR COMBINATIONS ON THE GROWTH AND YIELD OF ONIONS (Allium cepa L•)
THE EFFECTS OF GIBBERELLIC ACID (GA3), INDOLE ACETIC ACID (IAA) AND KINETIN (K) AND THEIR COMBINATIONS ON THE GROWTH AND YIELD OF ONIONS (Allium cepa L•)
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Date
1988-06
Authors
ISAAC, SUNITA LIZ
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Abstract
Two field experiments were conducted during the wet
season (June - October, 1906) and the dry season (January -
May, 1907) at Samaru in the northern guinea savanna
ecological zone of Nigeria to study the effect of growth
regulators Gibberellic (GA3) and Indole Acetic acid (IAA)
and Kinetin (K) and their combinations at 300, GOD, 900 pprn
on growth and yield of onions (Allium cepa L.).
The growth regulators were more effective in the wet
season thnn in the dry season. The treatment of
Gibberellic acid and kinetin at 600 ppm was the most effective
combination showing significant effects on the total fresh
weight and bulb fresh weight.
In the dry season, Gibberellic acid, at 600 ppm hod the
highest effect on the total fresh weight, bulb and leaf
fresh weight and bulb diameter.
Kinetin (K) had an inhibitory effect at (900 ppm)
higher concentrations while Indole Acetic Acid (IAA) hnri a
stimulatory effect at the same level. IAA had no effect
at low concentrations (300 ppm).
Description
A thesis submitted to the Postgraduate School, Ahmadu Bello
University, Zaria, in partial fulfillment of the requirements
of the Degree of MASTER OF SCIENCE IN AGRONOMY
DEPARTMENT OF AGRONOMY
FACULTY OF AGRICULTURE
AHMADU BELLO UNIVERSITY
ZARIA, NIGERIA
JUNE, 1988
Keywords
EFFECTS,, GIBBERELLIC,, ACID, (GA3),, INDOLE,, ACETIC,, ACID (IAA),, KINETIN, (K), COMBINATIONS,, GROWTH,, YIELD,, ONIONS,, (Allium cepa L•).