Agriculture Reference
In-Depth Information
Table 17.3.
Body weight gain (BWG; g/bird/day), feed conversion ratio (FCR; g/g) and proportion of feathers (PF) of broiler males and females in response to intakes
of threonine (Thri,
i
, mg/bird/day) during different phases of growth.
Starter
Grower
Finisher
Females
Males
Combined
Females
Males
Combined
Females
Males
Combined
Thr
i
BWG
PF
Thr
i
BWG
PF
Thr
i
FCR
Thr
i
BWG
PF
Thr
i
BWG
PF
Thr
i
FCR
Thr
i
BWG
Thr
i
BWG
Thr
i
FCR
PF
Levels
1
16
2.6
0.404
18
2.9
0.313
17
4.2
86
11.8
0.266
103
13.3
0.336
94
5.8
163
25.0
189
28.7
176
5.5
0.453
2
117
15.1
0.766
113
14.5
0.503
115
1.9
377
45.3
0.332 444 48.8
0.256 411
2.5
554 67.0
666
84.1
610
2.5
0.450
3
160
18.9
0.726
159
18.3
0.551
159
1.7
479
55.0
0.351 522 59.6
0.295 501
1.9
689 78.9
848
95.7
769
2.1
0.429
4
185
19.9
0.586
203
21.5
0.609
194
1.5
567
58.1
0.359 626 64.7
0.293 597
1.7
833 86.7
964
101
899
1.8
0.430
5
221
21.3
0.624
220
20.6
0.802
221
1.4
629
57.8
0.467 706 67.5
0.383 668
1.6
923 85.5
1112
108
1017
1.7
0.478
6
252
21.2
0.547
265
22.3
0.681
259
1.4
713
59.2
0.478 803 68.3
0.331 758
1.5
1048 85.5
1261
108
1154
1.7
0.451
7
266
19.4
0.689
291
22.0
0.772
279
1.4
776
57.6
0.470 850 64.7
0.345 813
1.5
1128 83.0
1359
103
1243
1.6
0.502
Sex × Thr
<0.05 <0.05
<0.05 <0.05
0.83
<0.01 <0.05
<0.01 <0.05
0.23
<0.01
<0.01
0.99
0.07
CV (%)
a
6.81 23.62
6.81 21.23
4.85
2.51 12.56
3.32 16.99
8.27
5.96
4.06
8.62 10.06
P
<0.01 <0.05
<0.01 <0.01
<0.01
<0.01 <0.01
<0.01
0.07
<0.01
<0.01
<0.01
<0.01 <0.05
a
CV = coefficient of variation.
