Agriculture Reference
In-Depth Information
Table 17.2.
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 methionine + cysteine (Met+Cysi,
i
, mg/bird/day) during three phases of growth.
Starter
Grower
Finisher
Combined
Females
Males
Combined
Females
Males
Combined
Met+
Cys
i
Met+
Cys
i
Met+
Cys
i
Met+
Cys
i
Met+
Cys
i
Met+
Cys
i
Levels
BWG
FCR
PF
BWG
M+Ci
BWG
FCR
PF
BWG
FCR
BWG
FCR
PF
1
56
10.0
2.2
0.334
194
30.4
197
30.4
195
2.8
0.362
377
56.5
3.2
427
59.8
3.4
402
0.505
2
116
19.3
1.7
0.324
293
43.4
314
46.5
304
2.1
0.356
548
72.5
2.5
646
83.9
2.6
597
0.447
3
167
25.6
1.4
0.324
381
51.6
411
56.1
396
1.7
0.347
693
81.4
2.2
796
94.2
2.2
745
0.466
4
209
28.7
1.3
0.365
456
54.8
498
62.5
477
1.6
0.452
823
86.2
2.0
945
101.4
1.9
884
0.520
5
242
29.4
1.2
0.336
495
56.7
537
62.0
516
1.4
0.393
943
87.2
1.9
1078
103.7
1.8
1011
0.476
6
276
29.4
1.2
0.370
557
57.5
611
65.1
584
1.3
0.471 1062
87.0
1.9
1213
105.7
1.7
1137
0.534
7
295
28.1
1.2
0.336
601
56.5
661
63.1
631
1.3
0.453 1153
86.4
1.8
1331
105.1
1.7
1242
0.497
Sex ×
Met+Cys
0.61
0.68
0.17
<0.01
<0.01
0.13
0.17
<0.01
<0.01
<0.01
<0.01
0.53
CV (%)
a
6.55
2.43
25.76
2.88
3.62
2.14
17.51
3.85
2.12
4.18
2.68
12.21
P
<0.01 <0.01
0.91
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
0.07
a
CV = coefficient of variation.
