The utilization of synthetic methionine in broiler chicken production: effect on growth performance, blood and carcass characteristics

Abstract

An 8-week feeding trial was carried out to evaluate the effect of graded levels of synthetic methionine on the growth performance, blood and carcass characteristics of broiler chickens. A total of 120 day-old chicks of Amobyn strain with mean body weight of 36.67g were randomly divided into four groups of 30 chicks each to constitute treatments T 1 (0% control), T 2 (0.20% methionine), T 3 (0.40% methionine) and T 4 (0.60% methionine), respectively. Each group was further divided into three replicates of 10 birds each in a Completely Randomized Design (CRD). Feed and water were provided ad libitum and all the birds were managed on a deep litter floor under the same environmental conditions for 56 days. All data were subjected to One-way analysis of variance and significant mean values were separated using Duncan Multiple Range Test. The results obtained for starter broiler chickens showed that total feed intake, weekly feed intake, daily feed intake and feed conversion ratio were significantly (P<0.05) influenced by dietary treatments while the results for finisher chickens showed that only the final body weight was significantly (P< 0.05) influenced. The blood characteristics showed that monocytes, mean corpuscular volume and mean corpuscular haemoglobin concentration were significantly (P<0.05) influenced by dietary treatments. The serum biochemical indices showed no significant (P>0.05) differences between dietary treatments on all parameters. Carcass characteristics showed significant (P<0.05) differences between dietary treatment in pre-slaughter weight, lungs weight, intestinal length, intestinal weight as well as weight of spleen and oesophagus. Therefore, this study concludes that synthetic methionine can be included in the diets of broiler chickens up to 0.60% without detrimental effects on their growth performance, blood and carcass characteristics.

Influence of Liquid Methionine (methiogrow) in Drinking Water on Broiler Chicks Performance, Drinking Water, and Carcass Traits

“…The results in table (2) of live body weight, weight gain and FCR obtained in this study are consistent with the results of (Cadirci and Koncagul, 2014) who were found that significant results (P ≤ 0.05) observed in these traits when adding liquid methionine at different levels, as well as consistent with what the researchers found in the amount of feed consumed as there were no significant differences between the treatments in this trait The results of live body weight, feed intake, body weight gain and FCR are consistent with what (Salary et al, 2015) found in their study on different sources and forms of methionine, where they showed an enhancement in FCR in the treatments in which methionine was added to feed or water compared to the treatment in which methionine was not added. The results of the quantity of consumed feed and FCR in this study did not agree with what (Ozung et al, 2018) has found, as the results obtained from his study showed that there were significant differences (P ≤ 0.05) between the treatment birds in which different percentages of liquid methionine were added. These results indicate that the way of distributing methionine (in feed or water) is indifferent from the argument of view of sustaining requirements for the broiler chicks' performance (Rehman et al, 2019).…”