THE USE OF ORGANIC MANURE SUPPLEMENTED WITH INORGANIC FERTILIZER IN CROP PRODUCTION IN THE NORTHERN GUINEA SAVANNA ZONE OF NIGERIA
THE USE OF ORGANIC MANURE SUPPLEMENTED WITH INORGANIC FERTILIZER IN CROP PRODUCTION IN THE NORTHERN GUINEA SAVANNA ZONE OF NIGERIA
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Date
1995
Authors
YARO, DAN TAGWAI
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Abstract
Green house and field studies were carried out in the 1993
cropping season to evaluate the use of organic manure
supplemented by inorganic fertilizer in the Northern Guinea
Savanna Zone of Nigeria. The studies were carried out in Samaru
(11° ll'N, 07° 38'E), Institute for Agricultural Research, Ahmadu
Bello University, Zaria. The treatments consisted of factorial
combinations of five rates of organic manure (0, 2.5, 5.0, 7.5
and lOtha-1) and five levels of H.P.K. fertilizers (H0P0K0;
H40P20K20' N80P40K40- ^ 2 0 ^ 0 ^ 0 a n d N160P80K30>' l a i d o u t in a
randomized complete block design with three replications. Maize
was used as the test crop in the twc experiments.
Maize shoot and root DMY, generally increased with
increasing rates of organic manure and inorganic fertilizer.
Organic manure increased shoot and root DMY up to 5.0t ha while
increases due to inorganic fertilzier were linear and significant
up to 160:80:80 Kgha-1 rate. The interaction effects, though not
significant, showed that combination of 40:20:20 Kgha-1 and 2.5
tha-1 gave slightly higher shoot and root DMY than 120:60:60 or
160:80.80 Kgha-1 fertilizer alone by 56.6 and 58.4 percent,
respectively.
In the field organic manure significantly (at P = 0.05)
increased grain yield, 1000-grain weight, cob length, harvest
index and shelling percentage, while stover yield, number of
kernel per cob and cob diameter were not significantly affected.
With inorganic fertilizer, grain yield and all other yield
components were significantly increased. The interaction effects,
although not significant, show that plots receiving combination
of 40:20:20 Kgha-1 and 2.5 tha-1 gave slightly higher grain yield
than plots receiving 120:60:60 or 160:30:80 Kgha-1 alone. The
percentage increases are 18.06 and 15.78 respectively.
Generally, nutrient concentrations in plant tissues from the
Green house study tended to decrease with increasing rates of
organic manure and inorganic fertilizer. The decreases were
significant (at 5% level of significance) for some of the
elements. Uptake values on the other hand tended to increase
with increasing rate of organic manure and inorganic fertilizer.
In the field, nutrient concentrations of the plant samples were
significantly affected by organic manure, while values
significantly (5% level) increased with increasing rates of
inorganic fertilizer.
Description
A Thesis
Submitted to the Postgraduate School, Ahmadu Bello University, in
Partial Fulfillment of the requirements for the Degree of Master
of Science
Department of Soi1 Science
Faculty of Agriculture
Ahmadu Bello Uiniversity, Zaria
Keywords
USE,, ORGANIC,, MANURE,, SUPPLEMENTED,, INORGANIC,, FERTILIZER,, CROP,, PRODUCTION,, NORTHERN GUINEA SAVANNA,, ZONE,, NIGERIA