Effect of zinc methionine supplementation on the growth performance, biochemical parameters and morphology of the intestine in broilers
Loading...
Date
2021-04-22
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Sher-e-Kashmir University of Agricultural Sciences & Technology, Jammu (J&K)
Abstract
Effect of zinc methionine supplementation on the performance traits, serum biochemical parameters, liver enzymes, antioxidant enzyme activities, intestinal histomorphometry and carcass traits of Vencobb strain broilers were studied from day old to 42 days. A total 240 broiler chicks were randomly divided into 3 groups. The broilers fed with basal diet were kept as control group (C), T1 group consists of the broilers fed with zinc methionine @ 45mg/kg in basal diet; whereas, T2 group consists of broilers fed with zinc methionine supplementation @ 90mg/kg of basal diet. Body weight was taken from day 1 to day 42 and feed intake, body weight gain and FCR were recorded from day 7 to 42 on weekly basis. Blood samples were collected on 14, 21, 28, 35 and 42 day. One drop of whole blood was used for glucose estimation. Blood was collected, serum was separated and different parameters viz serum enzymes, biochemical parameters and antioxidant enzymes were studied. Sacrificed birds were used for the histomorphometry of small intestines, carcass characteristic and texture analysis of raw meat. Performance traits, total protein, total cholesterol, SOD, GPx, histomorphometrical parameters of small intestines, breast, drumstick and evisceration yield percentages, chewiness, hardness and adhesiveness showed significantly (P<0.05) increasing trend with the advancing age. Zinc methionine supplementation in broilers significantly (P<0.05) enhanced body weight, feed intake, average body weight gain and improved FCR. Total protein, serum zinc level, SOD and GPx antioxidant enzyme activities, histomorphometrical parameters of small intestines (villus height, villus width, height of epithelial cells and thickness of muscularis laminae) increased significantly (P<0.05) in the supplemented groups. Dressing, evisceration, giblet, drumstick and breast yield percentages were also significantly (P<0.05) increased in supplemented groups as compared to control. However, creatinine, total cholesterol, serum enzymes (ALP, ALT and AST) and scores of chewiness and cohesiveness significantly (P<0.05) decreased in the zinc methionine supplemented groups as compared to control. From the present study, it can be concluded that zinc methionine can be used as a diet supplement for increasing the overall performance in broiler chicks during their growth period. Dietary supplementation of zinc methionine @ 45mg/kg is recommended in broilers for overall better performance