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ThesisItem Open Access Effect of dietary black cumin (Nigella sativa) supplementation on performance of commercial broilers(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-07) Naula, Namita; Singh, C.B.In the present investigation, experimental, trial was conducted on 120, day old broiler chicks (cob-400 strain) for a period of 6 weeks, to study the effect of black cumin supplementation on the growth performance, carcass traits and certain hemato-biochemical and health status related parameters. In the investigation, experimental broiler chicks were randomly divided into four dietary groups (T1, T2, T3 and T4) each group having three replications consisting of ten broiler chicks each. The different groups were supplemented with black cumin @ 0, 0.05, 0.75 and 1.00 per cent in the experiment. Growth parameters were studied at weekly intervals as well as for starter (I-III week), finisher (IV -VI week) and overall periods (I-VI weeks). At the end of experiment on 42nd day, two broiler chickens from each replicate (six broiler birds/ treatment) were randomly slaughtered for carcass yield, yield of cut up parts, organ weights and processing losses. Representative blood samples were also collected for study of hemato-biochemical parameters. The results of the experiment indicated that dietary inclusion of black cumin in broiler chickens increased body weight gain, increased feed intake, improved feed conversion ratio and performance index significantly (P<0.05), with best performance during all the periods was noted in group supplemented with 0.5 per cent of black cumin. The dressed yield with and without giblet were significantly (P<0.05) affected by black cumin supplementation. Breast and back weight were significantly higher due to supplementation of black cumin. Weight of thigh, drumstick, neck and wings were not significantly affected by black cumin supplementation. Black cumin supplementation significantly improved gizzard weight. Heart and liver weight and processing losses were not affected by black cumin supplementation. Hematological parameters such as TEC, TLC, PCV and Hb values showed significant impact of black cumin supplementation while MCV showed significant decrease and MCH showed non-significant impact of black cumin seeds supplementation in broilers chickens. Decreased concentration of serum glucose, serum cholesterol and serum triglycerides whereas increased concentration of HDL cholesterol was noticed in black cumin supplemented groups. Protein profile showed significant improvement in total protein and globulin with black cumin supplementation and non significant effect on the albumin and albumin-globulin ratio. From the results of present study it can be concluded that, dietary black cumin supplementation at 0.05 per cent level may be advised to improve growth performance and FCR while 1percent level may be advised to improve carcass yield and hemato-biochemical parameters and also decrease in serum total cholesterol and production lean meat of broiler chickens.