We evaluated the effects of dietary surpluses (100%, 110%, and 120% of Ross recommendations) of methionine (Met) and lysine (Lys) on growth performance, blood serum parameters, immune responses, and carcass traits of broilers using a completely randomized design with a 3 x 3 factorial arrangement. Broilers fed a diet containing Met and Lys according to Ross recommendations had maximal growth performance. During the starter period, higher Lys decreased intake of feed, energy, and protein (linear, P < 0.01) and weight gain (linear, P = 0.01). A diet with 110% Lys decreased feed efficiency (quadratic, P = 0.03) during the grower period and decreased the pre-slaughtered body weight (tendency; quadratic, P = 0.10), and increased serum uric acid (quadratic, P = 0.03). Dietary Lys level had an inverse correlation with serum phosphorus (linear, P = 0.02) and immune response against Newcastle disease virus after the first vaccination (linear, P = 0.03). There were Met x Lys interaction effects on serum glucose (P = 0.01), and relative weights of the rectum (P = 0.02) and liver (P = 0.02). Taken together, our results indicate that dietary surpluses of Met and Lys provided no additional benefits in broiler performance.

Sigolo, S., Deldar, E., Seidavi, A., Bouyeh, M., Gallo, A., Prandini, A., Effects of dietary surpluses of methionine and lysine on growth performance, blood serum parameters, immune responses, and carcass traits of broilers, <<JOURNAL OF APPLIED ANIMAL RESEARCH>>, 2019; 47 (1): 146-153. [doi:10.1080/09712119.2019.1583571] [http://hdl.handle.net/10807/142781]

Effects of dietary surpluses of methionine and lysine on growth performance, blood serum parameters, immune responses, and carcass traits of broilers

Sigolo, S.;Gallo, A.;Prandini, A.
2019

Abstract

We evaluated the effects of dietary surpluses (100%, 110%, and 120% of Ross recommendations) of methionine (Met) and lysine (Lys) on growth performance, blood serum parameters, immune responses, and carcass traits of broilers using a completely randomized design with a 3 x 3 factorial arrangement. Broilers fed a diet containing Met and Lys according to Ross recommendations had maximal growth performance. During the starter period, higher Lys decreased intake of feed, energy, and protein (linear, P < 0.01) and weight gain (linear, P = 0.01). A diet with 110% Lys decreased feed efficiency (quadratic, P = 0.03) during the grower period and decreased the pre-slaughtered body weight (tendency; quadratic, P = 0.10), and increased serum uric acid (quadratic, P = 0.03). Dietary Lys level had an inverse correlation with serum phosphorus (linear, P = 0.02) and immune response against Newcastle disease virus after the first vaccination (linear, P = 0.03). There were Met x Lys interaction effects on serum glucose (P = 0.01), and relative weights of the rectum (P = 0.02) and liver (P = 0.02). Taken together, our results indicate that dietary surpluses of Met and Lys provided no additional benefits in broiler performance.
Inglese
Sigolo, S., Deldar, E., Seidavi, A., Bouyeh, M., Gallo, A., Prandini, A., Effects of dietary surpluses of methionine and lysine on growth performance, blood serum parameters, immune responses, and carcass traits of broilers, <<JOURNAL OF APPLIED ANIMAL RESEARCH>>, 2019; 47 (1): 146-153. [doi:10.1080/09712119.2019.1583571] [http://hdl.handle.net/10807/142781]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10807/142781
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