TY  - JOUR
T1  - Betaine (Betafin®) Replacement for Methionine in Diet on Growth Performance and Carcass Characteristics of Broiler Chickens
AU - Baghaei, M. AU - Ashayerizadeh, A. AU - Eslami, M. AU - Bojarpour, M. AU - Roshanfekr, H. AU - Mirzadeh, K.H. 
JO  - Research Journal of Biological Sciences
VL  - 4
IS  - 9
SP  - 1037
EP  - 1040
PY  - 2009
DA  - 2001/08/19
SN  - 1815-8846
DO  - rjbsci.2009.1037.1040
UR  - https://makhillpublications.co/view-article.php?doi=rjbsci.2009.1037.1040
KW  - Betfin
KW  -methionine
KW  -diet
KW  -performance
KW  -carcass
KW  -broiler
AB  - An <I>in vivo</I> experiment was conducted to determine the effect of dietary betaine supplementation as a replacement for methionine on broiler performance and carcass characteristics. Three hundred day old Ross 308 broilers were used in a randomized completely design with 4 treatment and 5 replicates in each treatment and 15 birds/replicates and reared on the floor pens for 42 days. A basal diet was formulated as control according to NRC, recommendations for starter (1-21 days) and grower (22-42 days) periods. In experimental diets, methionine levels were as formulated (control (T<SUB>1</SUB>)) and at 90 (T<SUB>2</SUB>), 80 (T<SUB>3</SUB>) and 70% (T<SUB>4</SUB>) of the control. The incompleted levels of the methionine in T<SUB>2</SUB>, T<SUB>3</SUB> and T<SUB>4</SUB> supplemented by adding Betafin to the diets. The result of present study indicated that feed intake was no affected by treatments (p&gt;0.05). The birds under T<SUB>2</SUB> and T<SUB>4</SUB> had lower body weight gain during 1-42 days as compared with control group. Also, the using of T<SUB>4</SUB> in both of 22-42 and 1-42 days and T<SUB>2</SUB> in 1-42 days significantly resulted to undesirable feed conversion ratio (p&lt;0.05). Supplementation levels of betafin in diets no significantly (p&lt;0.05) affected the amount of carcass and its cuts (p&gt;0.05), except the percent of thigh was significantly higher than control group (p&lt;0.05).
ER  -