Vol. 10, Special Issue 11 (2021)

Author(s):
Vinus, BS Tewatia and NS Maan

Abstract:
A study was conducted to assess the effects of replacing inorganic ‘zinc’ and ‘manganese’ with different levels of their organic complexes on carcass characteristics in broilers. Experiment I was conducted with 300 broiler chicks in two different phases, 0-4 weeks, 4-6 weeks for a period of 16 week. Experimental birds were divided into six groups, each consisting of 50 broiler chicks and all groups were also subdivided into five replications each containing 10 broiler chicks. The basal ration was formulated as per BIS (2007) specifications to meet energy and protein requirements of birds. In both the experiments, first group was kept as negative control (T1) containing mineral mixture without ‘zinc’ and ‘manganese’ and T2 (positive control containing mineral mixture with inorganic salts of ‘zinc’ and ‘manganese’) while experimental groups T3, T4, T5 and T6 were supplemented with mineral mixture incorporated with organic ‘zinc’ and organic ‘manganese’ @ 50 and 100% in substitution of their inorganic sources. The highest body weight gain and improved FCR in broilers was observed in T6 group which resulted into higher carcass traits showing highest dressing % (76.07), eviscerated % (63.36) and drawn % (67.45) in T6 group. Total weight of lymphoid organs was also significantly (P<0.05) inflated in T6 group.