Effect of Whole Substitution of Protein Source by Nigella sativa Meal and Sesame Seed Meal in Ration on Performance of Growing Lambs and Calves

摘要

This study included two experiments to investigate the effect of whole substitution of soybean mealand cotton seed meal by Nigella sativa meal (NSM) and sesame seed meal (SSM) as sources of protein ingrowing Barki lambs and growing calves ration on growth performance, digestibility and economical study.Experiment I: Fourteen Barki lambs averaged 28.60 kg body weight; 4 months old were divided into 2 groupsof 7 animals in each according to live weight in growth trial for 90 days. Animals were fed clover hay plusconcentrate feed mixture (CFM). Experiment II: Twenty two male Friesian calves averaged 246 kg live bodyweight, 14 months old were divided into 2 groups of 11 animals in each according to live weight. Animals werefed wheat straw plus CFM for 120 days. Results of chemical composition indicated that Nigella sativa meal andsesame meal were rich in protein and fat 33.13%, 32.35 % and 12.72, 15.45, respectively. Results of experimentI showed insignificant differences between the experimental rations for DM, OM, CP, EE and NFE. Crude fiber(CF) recorded lower value of digestion coefficient with R2 (59.16%) compared with R1 (69.01%). No significantdifferences observed between two rations in final weight, total weight and average daily gain of growing lambs.The data of feed intake did not show any differences between rations, economical study explained a significantdecrease in daily cost with R2 which contained NSM and SSM compared with R1 which contained commercialCFM. Results of experiment II indicated that digestibility values of DM, OM, CP and CF were similar betweenthe two rations while EE and NFE were significant higher with R2 compared with R1. Nutritive values resultsas TDN and DCP showed significant increase in TDN with R2. There were insignificant differences in averagedaily gain (ADG) and final body weight (FBW) of the experimental animal fed two tested rations. But there isa slight increase in average daily gain and final weight by 125 g and 15 kg with animal group fed R2 comparedwith R1. Relative economic efficiency was increased by 57% with replacement NSM and SSM for cotton seedmeal and soybean meal. Conclusively, Nigella sativa meal and sesame meal are good source of protein and maybe used as sole source of protein in rations of growing lambs and bulls and therefore it can be used to improveprofitability.