Optimum amino acid requirements for digestive organs development and meat yield of Naked neck broilers

Bhnaja, S.K. and Mandal, A.B. 2020. Optimum amino acid requirements for digestive organs development and meat yield of Naked neck broilers. Indian Journal of Poultry Science, 55(1): 31–36.

The effect of feeding 12 isocaloric diets (2x3x2 factorial design) formulated on the basis of total or digestible amino acids (2 variables), three levels of amino acids (115, 100 and 85 % of NRC, 1994) and with (FM) or without animal (VM) protein (2 variables) during 4–6 wks period was studied on digestive organ and carcass yields of naked Neck broilers (n=288). Though there was no significant difference (P>0.05) in the growth of digestive organs in the birds fed diet formulated on the basis of total or digestible amino acid, different levels of amino acids or meal type, but the liver weight increased numerically with increase in AA levels, and in FM and digestible AA diets. Higher large intestine weight (P°0.045) was recorded in total AA diets and higher small intestine length (P°0.019) was recoded in all vegetable meal diets. The graded levels of AA did not had any influence on the development of intestine. The vegetable protein based diet resulted better breast meat yield in broiler chickens. Dressing yield (P°0.039) and breast yield (P°0.047) were increased with increasing level of AA content of the diet. Whereas, abdominal fat (P°0.063) and back yield (P°0.024) was higher in low AA diet fed groups. It may be concluded that, the broilers fed diets formulated on digestible amino acid basis did not influence digestive organ development and carcass yields.