EFFECT OF CHITOSAN AND L-CARNITINE SUPPLEMENTATION ON GROWTH PERFORMANCE AND CARCASS FAT DEPOSITION IN BROILER CHICKEN
Loading...
Date
2022-02-25
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
COLLEGE OF VETERINARY AND ANIMAL SCIENCES MANNUTHY, THRISSUR, KERALA VETERINARY AND ANIMAL SCIENCES UNIVERSITY
Abstract
An experiment was conducted in Department of Poultry Science, College of Veterinary and Animal Sciences, Mannuthy to study the effect of chitosan and Lcarnitine supplementation on growth performance and carcass fat deposition in broiler chicken. A total of 150, day-old Vencobb 430Y broiler chicks were randomly allotted into three dietary treatment groups viz., T1, T2 and T3 with five replicates of ten birds each in a completely randomized design. The birds in T1 (control) group were fed with corn-soybean meal based standard broiler ration (SBR) formulated as per BIS (2007), T2 group was fed SBR supplemented with chitosan at the rate of 30g/kg feed and T3 group was fed SBR supplemented with L-carnitine at the rate of0.05 g/kg feed. The chitosan and L-carnitine supplementation (T2 and T3) did not show significant effect on mean body weight and weight gain of broilers at weekly intervals in this study. The chitosan and L-carnitine supplemented groups (T2 and T3) had significantly (p<0.05) lower feed consumption and better feed conversion ratio (FCR) than control group (T1) during the first week of the experimental period. However, during the subsequent period dietary treatments did not produce any effect on feed consumption as well as FCR of broiler chicken. The dietary treatments did not have significant effect on carcass characteristic traits studied except on percentage abdominal fat pad of broiler chicken. The mean abdominal fat pad yield of broilers in chitosan supplemented group (T2) was significantly (p<0.01) lower than L-carnitine supplemented group (T3) and both were statistically lower than control group. The mean heart yield of broilers showed a significantly (p<0.05) lower value in chitosan supplemented group (T2) as compared with other treatment groups. The chitosan supplementation (T2) significantly (p<0.01) reduced the mean cholesterol content of breast meat as compared with other treatment groups. But, L-carnitine supplementation (T3) did not produce any significant effect on the mean cholesterol content of breast meat. The chitosan (T2) and L-carnitine (T3) supplementation significantly (p<0.01) reduced the mean cholesterol content of thigh meat of broilers as compared with control group. The chitosan (T2) and L-carnitine (T3) supplementation significantly (p<0.05)
reduced the mean triglyceride content of breast and thigh meat of broiler as compared with control group. The chitosan and L-carnitine supplemented groups (T2 and T3) significantly (p<0.01) reduced the plasma total cholesterol, triglyceride and VLDL values in
broiler chicken as compared with control group. The plasma HDL value was significantly (p<0.05) reduced in chitosan supplemented group (T2) while the LDL value was significantly (p<0.05) lower in L-carnitine supplemented group (T3). Even though, there was a significant reduction in HDL value in the chitosan supplemented group, no adverse effect on general health is expected since the value remain in a normal range. The livability (per cent) of broilers during the experimental period was 96.00 in control group (T1) as well as chitosan supplemented group (T2) and 94.00 in L-carnitine supplemented group (T3). Total cost of production per bird at six weeks of age was 204.36, 317.05 and 202.29 and the net profit per kg body weight was Rs.62.00, 14.22 and 63.02 for the control group (T1), chitosan supplemented group (T2) and L-carnitine supplemented group (T3), respectively. Based on the overall results of this study, it could be concluded that dietary supplementation of chitosan at the rate of 30 g/kg and L-carnitine at the rate of 0.05
g/kg significantly (p<0.01) reduced the abdominal fat pad deposition in broiler chicken without any adverse effects on growth performance as well as carcass characteristics. It was also evident from the experimental findings that the dietary supplementation of chitosan and L-carnitine lowered the cholesterol and triglyceride content of breast and thigh meat of broilers and thereby proved to be beneficial in producing lean meat. Along with this, there was a significant (p<0.01) reduction in the plasma total cholesterol, triglyceride, LDL and VLDL values in both chitosan as well as L-carnitine supplemented groups. Therefore, the findings of the present study revealed that supplementation of chitosan and L-carnitine is beneficial for producing lean broiler meat. According to the results obtained, chitosan supplementation effectively reduced the abdominal fat pad yield and cholesterol content of meat as compared with L-carnitine. However, L-carnitine supplementation is economically more efficient, since it is having potent hypolipidaemic effect in a lower level of inclusion as compared with chitosan.