Response of growing goslings to dietary methionine from 28 to 70 days of age.
1. A dose-response experiment with 5 dietary methionine concentrations (23, 33, 43, 53 and 63 g/kg) was conducted with goslings to estimate the growth performance and carcase quality response of growing goslings to dietary methionine from 28 to 70 d of age. 2. A total of 150, 28-d-old birds were randomly distributed to 15 pens with 10 birds per pen according to similar pen weight. There were 5 dietary treatments, each containing three replicate pens. Weight gain, feed intake and feed/gain of goslings from each pen were measured at 2-week intervals from 28 to 70 d of age. At 70 d of age, 4 goslings were selected randomly from each pen and slaughtered to evaluate carcase quality. 3. Significant effects of dietary methionine on daily weight gain (28-56 d) and daily feed intake were determined. Daily weight gain from 28 to 42 d and 28 to 56 d, daily feed intake and gain/feed showed significant quadratic response to increasing dietary methionine, while abdominal fat proportion showed a significant linear response. 4. When dietary CP concentration was 1582 g/kg, the optimal methionine concentrations for growing goslings from 28 to 42 d and 28 to 56 d of age for maximum daily weight gain were 407 and 4.14 g/kg, respectively.
Wang
Z Y
ZY
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, P.R. China. dkwzy@263.net
Shi
S R
SR
Zhou
Q Y
QY
Yang
H M
HM
Zou
J M
JM
Zhang
K N
KN
Han
H M
HM
D000818:Animals; D001835:Body Weight / Q000502:physiology*; D004435:Eating / Q000502:physiology*; D005777:Geese / Q000254:growth & development* / Q000378:metabolism; D008460:Meat / Q000592:standards*; D008715:Methionine / Q000494:pharmacology*; D011897:Random Allocation
D008715:Methionine