Effect of dietary lysine regimens on growth performance and meat composition in Aseel chicken

ABSTRACT

A study was designed with the objective, to evaluate the effect of dietary lysine (Lys) regimens on growth performance and meat composition of Aseel chicken. In total, 540 day old chicks, 180 from each variety, were randomly assigned to 9 experimental groups in a 3 (Varieties Mianwali (MW), Peshawari (PW), and Lakha (LK)) × 3 (Lys regimens L1, L2 and L31.35, 1.30 and 1.25%) factorial arrangement under randomized complete block design (RCBD) with sex as block. Each experimental group was replicated 6 times with 10 birds in each with average weight of 29 gram. Feed intake (FI), weight gain (WG) and feedgain ratio (FG) parameters of growth performance and Dry Matter (DM), Ash, Crude Protein (CP) and Ether Extract (EE) parameters of meat composition were evaluated. The results indicated better (p=0.0006) WG and (p=0.0006) FG was observed in MW verities. Among different Lys regimens, higher and medium level in the diet improved WG (p<.0001), FG (p<.0001) and reduced (p=0.0001) FI. Similarly increased (p<.0001; 0.0150) ash content in thigh and breast due to increased level of lysine in the early life period. Dry matter was found to be higher (p=0.0036) only in medium Lys regimen, whereas meat CP was observed to be higher (p=0.0064) in control diet. It was concluded that, 1.30% digestible Lys level regimen can be used to improve the early growth rate of Aseel chicken. Similarly, Mianwali variety due to its better early growth can be used as a meat type chicken.