Available Online at http://www.journalajst.com
ASIAN JOURNAL OF
SCIENCE AND TECHNOLOGY
Asian Journal of Science and Technology
ISSN: 0976-3376
Vol. 6, Issue 01, pp. 940-946, January, 2015
RESEARCH ARTICLE
COMPARATIVE PERFORMANCE OF NERA BLACK AND SHAVER BROWN HENS FED SELFCOMPOUNDED AND COMMERCIAL LAYERS’ DIETS
1*Oyeagu,
2Department
C. E., 1Ani, A. O., 1Egbu, C. F., 1Udeh, F. U. and 2Omumuabuike, J. N.
1Department
of Animal Science, University of Nigeria, Nsukka, Nigeria
of Animal Health and Production Technology, Anambra State College of Agriculture Mgbakwu,
Nigeria
ARTICLE INFO
ABSTRACT
Article History:
This study was conducted to assess the performance and economic traits of feeding self-compounded
layers’ diet and four commercial layers’ diets to Nera Black and Shaver Brown hens in hot humid
tropical environment. A total of 120 28-weeks old Nera black hens and 120 28-weeks old Shaver brown
hens were used. Each strain of bird was divided into five groups of 24 hens each and each group
(for each strain) was randomly assigned to one of the five experimental diets (A, B, C, D, and E,
respectively). Results showed that the Nera Black hens which consumed self-compounded diet (A) and
commercial diet (D) recorded better (P<0.05) hen day production percentage value than Shaver Brown
hens that consumed the same feeds.The gross profit from eggs produced by Nera Black birds that
consumed the self-compounded diet was higher (P<0.05) than that from eggs produced by the Shaver
brown birds which consumed the same diet. It was concluded that the Nera Black hens performed better
than the Shaver Brown hens in terms of dozens of eggs produced, revenue from dozens of eggs
produced and gross profit, while the use of self-compounded diet resulted in better performance than
the use of commercial diets.
Received 02nd October, 2014
Received in revised form
05th November, 2014
Accepted 01st December, 2014
Published online 30th January, 2015
Key words:
Experimental Diets,
Strain of Bird,
Gross Profit,
Hot Humid Tropical Environment
Copyright © 2015 Oyeagu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use,
distribution, and reproduction in any medium, provided the original work is properly cited.
INTRODUCTION
In Nigeria, the rate at which food is being produced is not
commensurate with the rate at which population is increasing.
According to FOS (1996) as cited in Ojo (2003), food
production increases at the rate of 2.5% while food demand
increases at a rate more than 3.5% due to high rate of
population growth of 2.83%. According to Ajibefun and
Daramola (1999) poultry production has been one of the most
important contributions to employment opportunities in
Nigeria. Poultry production has become a popular source of
income to small scale farmers in Nigeria because of high level
of research information developed in the past years, the
development of economic integrated system for production
and marketing of poultry products, and the knowledge of
genetics, nutrition, management and disease control (Olarinde
and Kuponiyi, 2004). Poultry production has also been
described as the most economic means of reducing the animal
protein shortfall in developing countries (Smith, 2001;
Oluyemi and Roberts, 2000). Poultry feeding is a major item
of cost in poultry production. Many commercial poultry farms
had collapsed while a good number of them experienced slow
*Corresponding author: Oyeagu, C. E.,
Department of Animal Science, University of Nigeria, Nsukka,
Nigeria.
growth as a result of sudden increase in the cost of poultry
feeds (Ogundipe, 2002; Onimisi, 2004). This incident paved
way for commercial poultry feed manufacturers to source for
unconventional, low quality and stale feed ingredients in order
to maximize profit. Neglecting the fact that laying birds need
qualitative feed to enhance egg production. High cost of
poultry feed also results in general increase in the cost of
production. Hence, in other to increase profitability in the
poultry industry, there is the need to formulate practical rations
that will help in reducing the cost of production and still
maintain high level of performance in the birds
(Adebayo et al., 2002). Where farmers are faced with
sub-standard or low quality feed from the commercial feed
dealers, they have the choice of formulating their own feeds
provided the proximate/ chemical compositions of the feed
ingredients being used in ration formulation are known so as to
meet the nutrient requirements of the animal for optimum
performance (Lorgyer et al., 2007).Although management
and feeding practices are the key determining factors of egg
production, the breed of laying hen affects egg production.
The rate of adaptation and quality of egg production of
different exotic breeds of hen vary when exposed to a variety
of climate and environments. According to Miles and Jacob
(2000), some hens may be laying at a very high production
rate while others may not be laying at all.
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Asian Journal of Science and Technology Vol. 6, Issue 01, pp.940-946, January, 2015
Conducting research on the laying capabilities of two strains
of exotic breed of hen therefore, has become imperative so as
to obtain information that would help to establish proven
production basis which will determine their suitability for
massive commercial and small scale egg productions when
exposed to feeds from different sources. The present study was
therefore conducted to determine the comparative laying
response of Shaver brown and Nera black hens to self-made
and commercial layers’ diets in hot humid environment.
MATERIALS AND METHODS
The study was conducted at the Poultry Unit of the
Department of Animal Science Teaching and Research Farm,
University of Nigeria, Nsukka. Nsukka lies within longitude
6o 451E and 7oE and latitude 7o 12.51N (Offomata 1975) and
on the altitude 447m above sea level. The climate of the study
area is typically tropical, with relative humidity ranging from
65 – 80% and mean daily temperature of 26.8oC (Agbagha,
et al., 2000). The rainy season is between April – October and
dry season between November – March with annual rainfall
range of 1680 – 1700mm (Breinholt et al., 1981). The entire
study lasted for 12 weeks.
Experimental Diets
Five experimental diets (A, B, C, D and E) was used as
follows: Diets B, C, D and E will comprise Top®, Gold
medal®, Chidera® and Vital® commercial layers feeds,
respectively while diet A was self-compounded (homemade)
layers’ mash. The percentage composition of the
self -compounded diet is presented in Table1.
Table 1. Percentage and Calculated Compositions of
Experimental Diets
Ingredients
Maize
Wheat offal
Palm kernel cake
Groundnut cake
Fish meal
Soy bean meal
Bone meal
Lime stone
Salt
Lysine
Methionine
Layers’ premix*
Total
Crude protein (%)
Crude fibre (%)
Ether extract (%)
Lysine (%)
Methionine (%)
Calcium (%)
Energy (Mcal/kg ME)
The hens were housed in the laying house situated at the
Poultry Unit of the Department of Animal Science Teaching
and Research Farm, University of Nigeria, Nsukka. The house
is an open – sided tropical type, fitted with two-tier battery
cages with feeders and drinkers. Flat aluminum metal plates
were constructed and used to partition the feeding troughs at
intervals of four (4) cages. The idea was to prevent spillover of
feeds from or to neighboring treatments. The birds of each
strain were randomly divided into five groups of 24 hens each
and each group was randomly assigned to one of five
experimental diets (Self-compounded layers’ diet (A)
(reference diet), and four commercial layers’ diets-B, C, D,
and E, respectively) using a randomized completely blocks
design (RCBD), with strain constituting the block.
Diet A which is the self-compounded diet served as the control
diet. Each diet constituted a treatment and each treatment was
replicated three (3) times with eight (8) birds per replicate for
each strain. Two hens were housed in a cage measuring 49 x
35 x 42 cm. Four (4) of such cages constituted a replicate for
each strain. Each hen in a replicate received about 130g of
layers’ mash daily and ad libitum supply of water for the
twelve weeks experimental period. As a general flock
prophylactic management strategy, routine vaccinations were
administered as and when due.
Performance Parameters Measured
The parameters measured included as follows:
Initial and final body weights: These were measured at the
beginning and at the end of the experiment, respectively.
Average Body Weight (kg) = Final body weight – initial body
weight.
Diets
A
48
10
14
10
2
6
3
6
0.25
0.25
0.25
0.25
100
17.00
5.49
4.97
1.24
0.92
3.73
2700
B
-
C
-
D
-
E
-
-
-
-
-
-
-
-
-
16.50
6.00
5.00
0.80
0.34
3.80
2500
16.50
6.50
4.50
1.00
0.50
3.50
2550
16.50
6.00
4.56
0.90
0.45
3.55
2600
16.50
6.50
4.00
1.00
0.55
3.60
2650
Animals and Management
The experiment was carried out in accordance with the
provisions of the Ethical Committee on the use of animals and
humans for biomedical research of the University of Nigeria,
Nsukka (2006). A total of 120 28-weeks old Nera black hens
and 120 28-weeks old Shaver brown hens were used for the
study.
Percentage Egg Production: Percentage egg production was
calculated using the formula as shown below:
Egg Weight (g): Egg weight was taken for every egg collected
for the hens and the weighing was done for all the collected
eggs within one hour of collection. Electronic balance (D and
G sensitive scale) was used and the measurement expressed in
grammes.
Egg Quality: Sixteen (16) eggs were randomly selected weekly
for egg quality analysis. The indices determined were as
follows:
Egg Shell Weight (g): Each egg was carefully broken and
dried after which the egg was weighed using a weighing
balance.
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Asian Journal of Science and Technology Vol. 6, Issue 01, pp.940-946, January, 2015
Egg Shell Thickness (mm): This was determined by pulling
off the shell immediately the egg was broken and the shell
was air-dried for a day (24 hours) after which the egg shell
thickness was determined with the help of a micrometer screw
guage.
Gross Profit (N) = Revenue from dozens of egg
produced (N) ˗ Cost of feed Consumed (N) (all other things
been equal).
Egg Shape Index: The egg shape index was calculated as the
proportion of egg length to diameter.
Samples of the five experimental diets were analyzed for their
proximate compositions according to AOAC (2006) methods.
Data collected were subjected to analysis of variance
(ANOVA) for randomized completely block design (RCBD)
as described by Akindele (2004) using a Statistical Analysis
System (SAS, 2006). Significantly different means were
separated using Duncan’s New Multiple Range Test (Duncan,
1995) as outlined by Obi (2002).
Albumin Height and Diameter (mm/cm): The eggs after
weighing were broken into a flat bottom glass (beaker)
positioned on a flat surface. The albumin height was measured
using a tripod micrometer. Albumin diameter was taken as the
maximum cross sectional diameter of the albumin using a pair
of calipers and read on a ruler calibrated in millimeter.
Yolk Height and Diameter (mm/cm): The eggs after weighing
were broken into a flat bottom glass (beaker) positioned on a
flat surface. The Yolk height was measured using a tripod
micrometer. Yolk diameter was taken as the maximum cross
sectional diameter of the yolk using a pair of calipers and read
on a ruler calibrated in millimeter.
Albumin Index: The albumin index was calculated as the
proportion of yolk height to diameter.
Yolk Index: The yolk index was calculated as the proportion
of yolk height to diameter.
Haugh Unit: This was calculated from the values obtained
from the albumin height and egg weight by using the formula:
Haugh’s unit = 100log (H+7.57-1.7W0.37) as described by
Williams (1992).
Determination of Economic traits
Data generated were used to determine the cost implication of
feeding self-compounded layers’ diet and some commercial
layers’ diets to the experimental hens. The economic indices
determined include the following:
Price per Crate of Egg (N): A crate of egg was sold at N650
as at the time of the research work.
Cost
of
Feed
Consumed
(N)
Consumed (N) × Cost of kg of feed (N)
=
Total
feed
Price of a Dozen of Egg (N) = 1 dozen of egg was sold at
N260.40 as at the time of the research work.
Cost per dozen of egg (N) = Total cost of feed
consumed / Total dozen of egg produced
Revenue from Dozens of Egg Produced (N) = Total dozens of
egg produced x Price of one dozen of egg.
Proximate and Statistical Analyses
RESULTS AND DISCUSSION
Effect of Feed type and Strain type on Performance Traits
of Nera Black and Shaver Brown Hens
Data on the effect of feed type and strain type on performance
traits of Nera Black (NB) and Shaver Brown (SB) hens are
presented in Table 3. While no significant (P>0.05) effect
existed between feed type and strain type in final body weight
and average body weight gain, there were feed type x strain
type effects (P<0.05) on hen day production, average daily
feed intake (ADFI) and feed conversion ratio (FCR). Nera
Black hens which consumed self-compounded diet (A) and
commercial diet (D) had significant (P<0.05) hen day
production percentage value than Shaver Brown hens that
consumed the same feeds. It has been reported (Ojepapo
et al., 2009) that egg production is of great economic
importance and that the success of the enterprise depends on
the total number of eggs produced.
Table 2. Proximate Compositions of the Experimental Diets
Determined Compositions
Crude Protein (%)
Crude fibre (%)
Ether extract (%)
Ash (%)
Moisture (%)
Energy (Mcal/kg ME)
A
17.80
5.00
5.77
11.40
11.35
2670
B
17.30
4.60
5.33
10.70
11.45
2450
C
17.00
4.45
5.17
10.40
11.30
2455
Diets
D
17.20
4.15
5.56
13.30
10.91
2560
E
16.96
5.00
5.64
13.10
11.30
2565
Under the same dietary regime, the use of Nera black hens for
egg production may be a better option. As shown in Table 3,
Nera Black hens which consumed commercial diet C had
significant (P<0.05) higher ADFI and FCR values than Shaver
Brown hens that consumed the same diet. The observed
differences in hen day production, ADFI and FCR between
strains that were fed the various feeds may be attributed to
genetic variation. This is in line with earlier reports (Nawar
and Abdou, 1999; Suk and Park, 2001; Hocking et al.,
2003) which showed that genetic variation existed in egg
production between breeds, strains and lines. However, the
present observation disagrees with the report of Duduyemi
(2005) which showed that no effect (P>0.05) existed between
strains in overall egg production. The fact that Shaver brown
hens which consumed commercial diet C had lower (P<0.05)
ADFI and FCR values than Nera black hens which also
consumed the same diet (Table 3) tends to suggest that Shaver
brown hens utilized the feed more efficiently than their Nera
black counterparts.
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Asian Journal of Science and Technology Vol. 6, Issue 01, pp.940-946, January, 2015
A similar observation had been reported by Yakubu et al.,
(2007). It does imply therefore, that under the same dietary
regime, the use of Shaver brown hens for egg production will
help to save cost due to reduction in feed intake and cost of
feed consumed.
The observation that the egg shell thickness value of Shaver
Brown hens was higher (P<0.05) than that of the Nera Black
hens could be due to difference in the genetic constitution of
the two strains of birds. This is in line with earlier report
(Curtis et al., 1985) as cited by Singh et al. (2009), which
showed that different strains of laying hens vary significantly
in egg shell quality.
Table 3. Effect of Feed type and Strain type on Performance Traits
Parameters
Initial weight (kg)
Strain
NB
SB
SEM
A (control)
1.39
1.26
0.04
B
1.33
1.31
0.06
C
1.32
1.26
0.06
D
1.43
1.40
0.03
E
1.28
1.28
0.04
Final body weight (kg)
NB
SB
SEM
1.52
1.38
0.04
1.40
1.37
0.05
1.37
1.33
0.06
1.48
1.47
0.05
1.34
1.35
0.08
Av body wt gain (kg)
NB
SB
SEM
0.13
0.18
0.03
0.07
0.06
0.03
0.05
0.07
0.04
0.05
0.07
0.02
0.06
0.07
0.05
Hen day production (%)
NB
SB
SEM
87.67a
65.67b
1.87
86.00
75.00
2.35
79.33
78.33
2.77
80.67a
63.67b
1.01
77.33
59.67
2.32
Av daily feed intake (g)
NB
SB
SEM
79.17
75.42
1.42
93.10
76.67
2.37
99.25a
80.83b
1.56
89.58
84.17
1.78
79.17
58.75
2.35
1.25
1.35
1.52a
1.37
1.09
NB
1.20
1.60
1.25b
1.41
1.38
SB
0.07
0.10
0.04
0.05
0.08
SEM
a,b
; Row means with different superscripts differ significantly at P <0.05. NB= Nera Black, SB= Shaver Brown
Feed conversion ratio
Table 4. Effect of Feed type and Strain type on the External Egg Parameters of Nera Black and
Shaver Brown Hens
Parameters
Av egg wt(g)
Egg shell thickness(mm)
Egg shell weight (g)
Egg diameter (cm)
Egg length (cm)
Egg shape index
Strain
NB
SB
SEM
NB
SB
SEM
NB
SB
SEM
NB
SB
SEM
NB
SB
SEM
NB
SB
SEM
A (control)
69.55
62.16
0.96
0.23
0.26
0.02
8.62
7.84
0.37
3.31
3.29
0.05
4.74
4.50
0.01
1.43
1.37
0.05
Effect of Feed type and Strain type on the External Egg
Parameters of Nera Black and Shaver Brown Hens
The effect of strain type and feed type on the external egg
characteristics of Nera Black and Shaver Brown hens is shown
in Table 4. Although no combination (P>0.05) effect existed
between strain type and feed type in average egg weight, egg
shell weight, egg diameter, egg length and egg shape index,
significant (P<0.05) feed type x strain type existed in egg shell
thickness. Shaver Brown hens which consumed commercial
diets B and E had higher (P<0.05) egg shell thickness value
than Nera Black hens that consumed the same feeds.
B
64.50
65.11
0.60
0.20b
0.23a
0.01
7.97
8.05
0.05
3.29
3.31
0.01
4.74
4.69
0.03
1.44
1.42
0.02
C
63.11
64.56
0.84
0.23
0.25
0.02
7.88
8.43
0.19
3.25
3.30
0.02
4.71
4.65
0.03
1.45
1.41
0.07
D
64.50
67.30
0.88
0.23
0.25
0.01
8.35
8.89
0.14
3.28
3.34
0.03
4.79
4.74
0.03
1.46
1.42
0.09
E
64.84
65.40
1.52
0.20b
0.26a
0.01
7.95
8.68
0.09
3.29
3.35
0.04
4.72
4.66
0.04
1.44
1.39
0.08
Effect of Feed type and Strain type on the Internal Egg
Parameters of Nera Black and Shaver Brown Hens
The effect of feed type and strain type on the internal egg
characteristics of Nera Black and Shaver Brown hens is shown
in Table 5. There were no combination (P>0.05) effect
between strain type and feed type in all the internal egg
parameters (haugh unit score, yolk weight, yolk height, yolk
diameter, yolk index, albumin weight, albumin height,
albumin diameter, albumin length and albumin index)
determined.
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Asian Journal of Science and Technology Vol. 6, Issue 01, pp.940-946, January, 2015
Table 5. Effect of Feed type and Strain type on the Internal Egg Parameters of Nera Black and
Shaver Brown Hens
Parameters
Haugh unit score(%)
Strain
NB
SB
SEM
A (control)
92.33
87.33
1.67
B
83.33
88.33
0.85
C
86.33
88.33
0.89
D
86.00
89.67
1.22
E
82.67
89.00
1.09
Yolk wt (g)
NB
SB
SEM
16.01
15.35
0.09
16.44
15.95
0.23
15.72
15.88
0.13
16.25
16.04
0.30
16.02
15.55
0.57
Yolk hight (mm)
NB
SB
SEM
18.96
17.47
0.32
18.32
18.55
0.15
18.73
18.29
0.21
18.40
18.80
0.35
17.52
18.04
0.24
Yolk diameter(cm)
NB
SB
SEM
2.99
3.04
0.03
3.05
3.00
0.04
2.99
2.30
0.05
3.03
3.00
0.04
3.21
3.00
0.05
Yolk index
NB
SB
SEM
0.64
0.57
0.01
0.60
0.62
0.01
0.63
0.61
0.01
0.61
0.63
0.01
0.56
0.60
0.01
Albumin wt (g)
NB
SB
SEM
39.18
36.48
0.54
38.23
38.72
0.07
36.88
37.57
0.98
38.98
40.00
0.77
38.10
39.68
0.86
Albumin hight (mm)
NB
SB
SEM
8.73
7.77
0.24
7.16
8.08
0.20
7.61
8.07
0.09
7.63
8.45
0.31
6.77
8.14
0.12
Albumin
diameter(cm)
NB
SB
SEM
5.74
6.06
0.12
6.31
6.24
0.10
5.96
6.04
0.11
6.00
6.29
0.18
6.21
6.33
0.21
Albumin length (cm)
NB
SB
SEM
7.54
7.78
0.34
7.93
7.74
0.23
7.87
7.60
0.25
7.96
8.30
0.18
8.14
7.63
0.24
1.31
1.32
1.32
1.26
1.31
NB
1.20
1.32
1.26
1.24
1.29
SB
0.03
0.03
0.04
0.05
0.02
SEM
a,b
; Row means with different superscripts differ significantly at P <0.05.. NB= Nera Black, SB=
Shaver Brown
Albumin index
The observed similarity in the values obtained for the internal
egg parameters of the two strains of birds could be attributed
to the fact that these exotic birds are commercial hybrids that
have been selected over many generations from interbreeding
between specialized breeds, strains and lines. Similar views
have been expressed by Akinokun and Dettmers (1977) as
cited by Duduyemi (2005).
Effect of Feed type and Strain type on cost implication of
feeding self-compounded and Commercial Layers’ Diets to
Shaver Brown and Nera Black Hens
Table 6 shows the cost implication of feeding selfcompounded diet A and four different commercial diets to
Nera Black (NB) and Shaver Brown (SB) hens. There was no
combination (P>0.05) effect between strain type and feed type
in cost of feed consumed and cost per dozen of egg. However,
combination (P<0.05) effect existed between feed type x strain
type in dozens of eggs produced per bird, total feed consumed,
revenue from dozens of egg produced and gross profit. Nera
Black hens that consumed the self-compounded diet produced
more (P<0.05) dozens of eggs than the shaver brown hens that
consumed the same diet. Nera Black hens also consumed more
(P<0.05) of commercial diet C than the Shaver brown hens.
Table 6 also shows that more (P<0.05) revenue was realized
from the dozens of eggs produced by Nera Black hens which
consumed the self-compounded diet (A) and commercial diets
D and E than the Shaver brown hens that consumed the same
diets. The gross profit from eggs produced by Nera Black
birds that consumed the self-compounded diet was higher
(P<0.05) than that from Shaver brown hens which consumed
the same diet.
Among the five diets used in the study, the consumption of the
self-compounded diet (A) by the birds had significant and
positive effect on the dozens of eggs produced, revenue from
dozens of eggs produced and gross profit realized. This tends
to indicate that the use of the self-compounded diet reduced
production cost, increased performance in laying hen and
increased profit margins of the enterprise. This is in tandem
with previous reports (Adebayo et al., 2002; Afolayan et al.,
2009) which showed that to increase profitability in the
poultry industry, there is need to formulate practical rations
that will help in reducing the cost of production and still
maintain high level of performance in good strain of birds.
That the Nera black hens produced more dozens of eggs than
the Shaver Brown hens under the same dietary regime (Table
6) does imply perhaps that the Nera black hens were
genetically superior to the Shaver brown hens.
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Asian Journal of Science and Technology Vol. 6, Issue 01, pp.940-946, January, 2015
Table 6. Effect of feed type and strain type on the cost implication of feeding Self-compounded and Commercial
Layers’ Diets to Shaver Brown (SB) Hens
Parameters
Dozens of eggs produced per bird (dozen)
Strain
NB
SB
SEM
A (control)
6.73a
5.05b
0.21
B
6.32
5.72
0.53
C
6.08
6.01
0.34
D
6.18
4.88
0.42
E
5.91
4.54
0.35
Price per crate of egg (N)
NB
SB
SEM
650.00
650.00
-
650.00
650.00
-
650.00
650.00
-
650.00
650.00
-
650.00
650.00
-
Cost of kg of feed (N)
NB
SB
SEM
60.00
60.00
-
74.00
74.00
-
72.00
72.00
-
72.00
72.00
-
70.00
70.00
-
Total feed consumed (kg)
NB
SB
SEM
7.36
7.01
0.35
8.66
7.13
0.38
9.23a
7.52b
0.31
8.33
7.83
0.33
7.36
5.46
0.36
Cost of feed consumed (N)
NB
SB
SEM
441.60
420.60
4.55
640.84
527.62
3.45
664.56
541.44
4.33
599.76
563.76
3.35
515.20
382.20
4.14
Price of a dozen of egg (N)
NB
SB
SEM
260.40
260.40
-
260.40
260.40
-
260.40
260.40
-
260.40
260.40
-
260.40
260.40
-
Cost per dozen of egg (N)
NB
SB
SEM
65.62
83.29
1.87
101.40
92.24
2.07
109.30
90.09
2.11
97.05
115.52
2.09
87.17
84.19
1.99
NB
SB
SEM
1752.49a
1315.02b
2.05
1650.94
1489.49
2.51
1583.23
1565.00
2.52
1609.27a
1270.75b
2.25
1538.96a
1182.22b
2.73
Revenue from dozens of egg produced(N)
1009.51
918.67
1010.10
1310.89a
NB
706.99
1023.56
961.89
894.42b
SB
3.28
3.55
3.36
2.25
SEM
a,b
; Row means with different superscripts differ significantly at P <0.05.NB= Nera Black, SB= Shaver Brown.
Gross profit (N)
It does seem therefore that the Nera black hens are better
adapted to humid tropical environment than their Shaver
brown counterparts. Akanni et al. (2008) and Gwaza and
Egahi (2009) had expressed similar views. The performance
of laying hens kept in the tropics is determined to a large
extent by the bird’s productive adaptability (Yakubu et al.,
2007). Interestingly, the Nera Black hens ate more of
commercial diet C than the Shaver brown hens. This could
possibly be due to genetic differences coupled with physical
activities, physical condition, basal metabolic rate, body
temperature and body composition (Luiting, 1990 and Singh
et al., 2009).
From a general point of view, the results obtained in the
present study tends to suggest that the use of self-compounded
diet resulted in better performance and profit margins of the
poultry enterprise than the use of the commercial feeds. This
assertion agrees with earlier reports (Singh and Panda, 1988;
Ogunwoleye and Onwuka, 1997; Asaniyan and Laseinde,
2005; Lorgyer et al., 2007). Good strain of birds therefore,
should be considered as well as good formulated and balanced
ration when venturing into the poultry enterprise, especially
egg production. Afolayan et al. (2009) and Singh et al. (2009)
had made similar suggestion.
Conclusion
It is evident from the results obtained in the present study that
the Nera Black hens performed better than the Shaver Brown
hens in terms of dozens of eggs produced, revenue from
1023.76
800.02
3.34
dozens of eggs produced and gross profit, while the use of
self-compounded diet resulted in better performance than the
use of commercial diets.
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