Agriculture Reference
In-Depth Information
Table 21.2.
Effect of deleting single amino acids from the diet on nitrogen deposition (ND) and protein efficiency ratio (PER) of fast-growing broilers (Cobb 500) using the
comparative slaughter technique.
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
Diets
BD
Lys
Met+Cys
Trp
Thr
Arg
Val
Ile
Leu
Phe+Tyr
Gly+Ser
His
Period I (
6
to 21 days)
Initial BW
a
(g)
123
± 3.5
123
± 3.6
123
± 3.7
123
± 3.7
123
± 3.3
123
± 3.3
123
± 3.6
123
± 3.8
123
± 3.9
123
± 3.9
123
± 4.6
123
± 4.9
Final BW (g)
913 ±
57
686 ±
47
798 ±
87
731 ±
75
646 ±
42
739 ±
41
723 ±
64
778 ±
73
671 ±
56
669 ±
54
835 ±
71
695 ±
33
ND (mg N/kg
BW
0.67
/day)
2427 ±
23
2022 ±
28
2135 ±
30
2059 ±
19
1958 ±
16
1988 ±
10
1956 ±
42
2054 ±
43
1969 ±
28
1979 ±
27
2096 ±
33
2076 ±
66
NI (mg N/kg
BW
0.67
/day)
b
4200 ±
85
4214 ±
87
4389 ±
69
4306 ±
102
4041 ±
52
4201 ±
170
4038 ± 8.8
4121 ±
155
4102 ±
41
4206 ±
24
4052 ±
52
4146 ±
46
PER (g/g)
c
3.38 ± 0.19
2.78 ± 0.12
2.95 ± 0.18
2.84 ± 0.24
2.77 ± 0.16
2.94 ± 0.11
3.00 ± 0.19
3.09 ± 0.09
2.80 ± 0.14
2.73 ± 0.17
3.30 ± 0.20
2.85 ± 0.12
ND (% NI)
58.2 ± 1.1
48.5* ± 0.9
47.3* ± 0.7
50.2* ± 1.0
48.2* ± 0.5
44.0* ± 2.1
48.6* ± 0.2
46.5* ± 1.2
48.4* ± 0.4
47.0* ± 0.2
52.3* ± 0.8
51.1* ± 0.6
Requirement
(g/kg dry matter)
-
10.6 ± 0.04
7.20 ± 0.05
1.76 ± 0.01
7.41 ± 0.04
11.6 ± 0.03
9.15 ± 0.02
5.08 ± 0.06
12.6 ± 0.04
14.8 ± 0.16
16.6 ± 0.10
4.27 ± 0.12
Period II (
22
to 37 days)
Initial BW (g)
975.6 ±
14
975.6 ±
12
975.6 ±
13
975.2 ±
12
975.2 ±
10
975.6 ±
11
975.8 ±
11
975.8 ±
10
975.6 ±
10
975.6 ±
10
975.8 ±
10
975.0 ±
12
Final BW (g)
2139 ±
106
1939 ±
91
2045 ±
65
1863 ±
189
1872 ±
108
1903 ±
88
1889 ±
91
1958 ±
86
1773 ±
76
2032 ±
104
2074 ±
108
2080 ±
82
ND (mg N/kg
BW
0.67
/day)
1982 ±
15
1674 ±
28
1752 ±
30
1603 ±
28
1715 ±
20
1647 ±
33
1591 ±
38
1714 ±
19
1279 ±
28
1680 ±
9
1644 ±
24
1722 ±
9
NI (mg N/kg
BW
0.67
/day)
3105 ±
9
3537 ±
83
3615 ±
34
3152 ±
80
3444 ±
138
3340 ±
243
3294 ±
189
3464 ±
165
2923 ±
21
3503 ±
124
3395 ±
161
3427 ±
107
PER (g/g)
3.01 ± 0.22
2.28 ± 0.15
2.43 ± 0.13
2.36 ± 0.35
2.22 ± 0.25
2.38 ± 0.31
2.35 ± 0.15
2.38 ± 0.21
2.37 ± 0.20
2.48 ± 0.18
2.63 ± 0.08
2.63 ± 0.15
ND (% NI)
63.8 ± 0.2
47.3* ± 0.9
48.5* ± 0.3
50.9* ± 1.0
49.8* ± 1.5
49.3 ± 3.0
48.3* ± 2.4
49.5* ± 2.0
43.8* ± 0.3
48.0* ± 1.4
48.4* ± 2.0
50.2* ± 1.3
Requirement
(g/kg dry matter)
-
9.41 ± 0.04
6.50 ± 0.12
1.72 ± 0.03
6.40 ± 0.05
10.92 ± 0.09
8.04 ± 0.07
6.50 ± 0.08
12.2 ± 0.20
12.0 ± 0.04
14.8 ± 0.23
4.05 ± 0.01
Period III (
38
to 53 days)
Initial BW (g)
2591.2 ±
41
2591.4 ±
40
2591.0 ±
38
2591.2 ±
38
2591.2 ±
38
2591.4 ±
38
2591.0 ±
38
2591.2 ±
38
2591.4 ±
38
2591.4 ±
38
2591.2 ±
38
2591.4 ±
38
Final BW (g)
3747 ±
103
3419 ±
145
3448 ±
90
2883 ± 375
3026 ± 385
3326 ±
164
3390 ±
101
3157 ±
70
3045 ±
50
3435 ±
194
3286 ±
29
3453 ±
164
ND (mg N/kg
BW
0.67
/day)
1321 ±
19
812 ±
19
1018 ±
16
943 ±
15
947 ±
14
805 ±
30
962 ±
14
889 ±
15
694 ±
11
814 ±
7
849 ±
12
1012 ±
19
Continued
