Barley et al.
Table 1. Performance attributes and nutrient utilization of broilers.
TREATMENT GROUPS
Attributes
T1
T2
T3
T4
T5
SEM
CD
0-4 Weeks
Feed Intake
1412.99
1463.44
1450.38
1456.71
1430.27
31.13
98.08
(g/bird)
±42.59 a
±2.53 a
±28.15 a
±13.83 a
±45.16 a
Weight Gain
726.17
799.28
774.56
759.83
785.10
12.45
39.23
(g/bird)
±21.89 b
±9.33 a
±5.22 a
±7.40 ab
±11.24 a
0.5138
0.5461
0.5343
0.5216
0.5498
Feed Efficiency Ratio
00.01
00.03
±0.0002 b
±0.0060 a
±0.0066 ab
±0.0052 ab
±0.0175 a
373.15
436.59
413.72
396.39
431.77
Performance Index
10.36
32.65
±11.25 c
±9.87 a
±2.37 ab
±6.93 bc
±16.08 a
4-6 Weeks
Feed Intake
1088.88
1109.32
1117.76
1135.54
1131.93
27.19
85.67
(g/bird)
±34.86 a
±14.01 a
±34.90 a
±14.58 a
±29.19 a
Weight Gain
645.21
640.65
611.11
645.89
666.00
25.16
79.29
(g/bird)
±41.35 a
±9.82 a
±26.22 a
±15.60 a
±20.69 a
0.5913
0.5774
0.5463
0.5686
0.5883
Feed Efficiency Ratio
00.01
00.36
±0.2090 a
±0.0068 ab
±0.0068 ab
±0.0065 ab
±0.0100 a
383.22
369.95
334.10
367.45
392.04
Performance Index
21.47
67.66
±37.78 a
±9.07 a
±18.37 a
±13.14 a
±16.92 a
0-6 Weeks
Feed Intake
2501.87
2572.76
2568.14
2592.26
2562.20
38.39
122.60
(g/bird)
±18.07 a
±15.49 a
±56.58 a
±11.45 a
±60.53 a
Weight Gain
1371.38
1439.84
1385.67
1405.72
1451.10
21.56
67.95
(g/bird)
±19.63 b
±1.04 ab
±29.97 ab
±9.40 ab
±30.84 a
0.5482
0.5596
0.5395
0.5422
0.5667
Feed Efficiency Ratio
00.01
00.03
±0.0102 a
±0.0029 a
±0.002 a
±0.0043 a
±0.0144 a
752.16
805.77
747.61
748.36
822.78
Performance Index
21.66
68.25
±24.48 ab
±3.69 ab
±16.35 b
±18.94 b
±33.26 a
Nitrogen Retention (%)
70.50 b
74.57 ab
72.87 ab
76.41 a
77.18 a
1.678
5.28
75.71
80.20
76.95
80.63
81.86
Energy Retention (%)
1.61
5.09
±2.36 b
±0.46 ab
±2.41 a
±0.56 ab
±1.04 a
sufficient iron (Fe) to meet the nutritional requirements of
further suggested that uniformly high provision i.e. 80mg
poultry. Under wood and Suttle (1999) reported that Iron
Fe/kg DM for broilers upto 8 weeks of age recommended
is absorbed according to need and is therefore affected by
by NRC (1994) seems to be overgenerous. Mohanna and
factors such as the iron status of the body and age. They
Nys (1998) reported that in commercial chicks, for the
62
Journal of Animal Research: v.5 n.1. April 2015