Agriculture Reference
In-Depth Information
3000
2500
2000
1500
1000
14-
25 days (I)
56-
70 days (II)
500
98-
112 days (III)
0
0
250
500
Lysine intake (mg/BW
kg
/day)
750
1000
1250
1500
0.67
Fig. 20.3.
Nitrogen deposition in pullets during periods I (
14
to 28 days), II (
56
to 70 days) and III (
96
to 112 days)
in response to lysine.
3000
2500
2000
1500
1000
14-
28 days (I)
56-
70 days (II)
500
98-
112 days (III)
0
0
150
300
450
600
750
0.6
7
Methionine intake (mg/BW
kg
/day)
Fig. 20.4.
Nitrogen deposition in pullets during periods I (
14
to 28 days), II (
56
to 70 days) and III (
96
to 112 days)
in response to methionine.
Discussion
This approach considers
NMR
,
NR
max
T
,
NR
,
ND
max
T
and the efficiency of amino
acid utilization obtained from nitrogen bal-
ance trials.
This method calculates amino acid
requirements needed to achieve a spe-
cific proportion of the theoretical genetic
The aims of this study were to model the
amino acids, and to estimate the optimal
amino acid contents in the diets of growing
pullets according to their expected perform-
ance, based on the Goettingen approach.
