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Copyright of Journal of Livestock Science & Technologies (JLST) is the property of Shahid Bahonar University of Kerman & Iranian Society of Animal Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study aimed to evaluate the effects of dietary supplementation of Nutrition Bio-Shield Superfood® (NBS) on the growth performance, intestinal morphology, immune response and blood metabolites in broiler chickens fed with low metabolizable energy (ME) and crude protein (CP) diets. A total of 360 one-day-old Ross 308 broilers were used in a 42-d experiment. The birds were allotted to 6 dietary treatments with 5 floor pen replicates of 12 birds each; based on a completely randomized design. Dietary treatments included a positive control diet (PC, standard diet), a negative control diet (NC, 3% reduction in ME and CP without NBS supplementation), and dietary supplementation of NBS at 0.5, 1, 1.5, and 2 g/kg to negative control diet (NBS0.5, NBS1, NBS1.5, NBS2, respectively). Body weight on d 10 and body weight gain during d 1-10 were lower (P < 0.05) in birds fed with NC and NBS diets compared to the positive control group. During later phases and d 1-42, no significant differences were observed in body weight, body weight gain, feed intake, and feed conversion ratio of broilers among the treatments. Supplementation of NBS or lowering the nutrients by 3% had no significant effect on immune response (total Ig, IgG and IgM concentrations) compared to positive control group. NBS supplementation decreased muscle layer thickness (MLT) in the jejunum (P < 0.01). Villus width (WV) and MLT showed a linear response to the treatments (P = 0.02 and P = 0.02, respectively), in this case, VW increased with the supplementation of NBS at 0.5 to 2 g/kg, and MLT decreased with these levels of dietary NBS. In general, dilution of nutrients by 3% of the standard diet and dietary supplementation of NBS had no significant effect on growth performance, immune response, blood metabolites and carcass traits in broiler chickens. [ABSTRACT FROM AUTHOR]

This study aimed to evaluate the effects of dietary Nutrition Bio-Shield Superfood® (NBS) supplement on the growth performance, intestinal morphology, immune response, and blood metabolites in broiler chicks. A total of 360 one-day-old Ross 308 broilers were used in a 42-d experiment. Based on a completely randomized design, the birds were allotted to 5 dietary treatments with 5 floor pen replicates of 12 birds each. Treatments included supplementation of 0, 0.5, 1, 1.5, and 2 g/kg of NBS to a basal diet. Feed conversion ratio (FCR) during 25-42 d and 1-42 d were linearly improved (P ≤ 0.05) with increasing levels of dietary NBS. During these periods, FCR in groups that received 1 and 2 g/kg of NBS was significantly lower than the control group (P < 0.05). Dietary supplementation of NBS at 1 and 1.5 g/kg of the diet increased serum IgM level compared to all other treatments. Villus height (VH) and VH to crypt depth (CD) ratio showed a quadratic response to the treatments (P = 0.05 and P = 0.04, respectively), decreasing with the supplementation of 1.5 and 1 g/kg of NBS, respectively. The thickness of the muscle layer in the jejunum was increased by 2 g/kg of NBS compared to the control group. Feeding NBS had no significant effect on carcass traits and blood metabolites. In general, dietary NBS supplementation improves FCR, immune status, and jejunum histomorphology in broiler chickens. [ABSTRACT FROM AUTHOR]