Amrizal, Arif
(2014)
EFFECT OF THE ORGANIC FERTILIZERS GUANO AND TITHONIA (Tithonia
diversifolia) ON THE GROWTH AND YIELD OF SWEET CORN (Zea mays saccharata
Sturt).
EFFECT OF THE ORGANIC FERTILIZERS GUANO AND TITHONIA (Tithonia diversifolia) ON THE GROWTH AND YIELD OF SWEET CORN (Zea mays saccharata Sturt)
.
(Unpublished)
Abstract
ABSTRACT
An experiment to examine the effect of the organic fertilizers guano (bat manure) and
tithonia (Tithonia diversifolia) on the growth and yield of sweet corn (Zea mays saccharata Sturt)
was conducted at the Faculty of Agriculture wet field experimental station, Andalas University,
Padang located about ± 240 m above sea level. This experiment aimed to determine the best dosage
of these organic fertilizers and to determine the effect of each organic fertilizer on the growth and
yield of sweet corn. This experiment used a factorial design in a Randomized Block Design (RBD),
and consisted of 2 factors. The first factor (A) consisted of 4 guano dosages; (A1 = 0 ton/Ha, A2 =
10 ton/Ha, A3 = 15 ton/Ha, A4 = 20 ton/Ha) and the second factor (B) 4 tithonia dosages; (B1 = 0
ton/Ha, B2 = 10 ton/Ha, B3 = 15 ton/Ha, B4 = 20 ton/Ha) . Data were analyzed by the F test at the
5% significance level, then if the data were significantly different it was followed by Duncan’s
New Multiple Range Test (DMNRT) also at the 5% level. The variables observed were: the time for
shoot emergence, plant height, stem diameter, time for stamen and pistil emergence, husk corn cob
length, corn cob without husk length, length of filled cob, corn cob diameter, corn cob weight, and
plant fresh weight of. All guano and tithonia dosages significantly affected all the observed
variables, except for the time for shoot emergence.A dosage of 20 ton/Ha guano and 20 ton/Ha
tithonia fertilizer is the best for growth and yield of sweet corn.
Keywords : Sweet corn, organic fertilizers
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