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      Natural feed additives for broiler chickens

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          Abstract

          The study aims to evaluate the effects of ginger root powder and apple cider vinegar as natural feed additives on growth performance, meat quality, antimicrobial activity, and blood parameters of broiler chicken. A total of 450 one-day-old unsexed broiler chicks (Ross) were obtained from commercial hatchery and randomly distributed into three groups. Each group contained 3 replicates of 50 chicks. The 3 groups were randomly allocated to 3 treatments, where they were offered apple cider vinegar, Tv, ginger group, Tg, and control group, Tc. All the birds were offered a starter diet first 21 days filled by a grower diet from 22nd to 35th day and thereafter on a finisher diet up to day 35. There was no significant difference in thawing breast weight, muscle weight, water holding capacity, and colour of the broiler chickens supplemented with ginger root and apple cider vinegar. The bacterial colonies obtained from heart, lungs, and air sacs showed a significant difference between the bacterial colonies of lungs and heart and between colonies of lungs and liver. The final body weight between the three treatments was not affected by the natural feed additive supplementation. However, there was no significant impact of ginger root and apple cider vinegar supplementation on broiler serum total protein, total cholesterol, triglyceride (Tri), ALT, and AST levels. The results concluded that herbal natural feed additives have negative impact on growth performance, meat quality, antimicrobial activity, and blood parameters of broiler chickens.

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          The effect of herbs and their associated essential oils on performance, dietary digestibility and gut microflora in chickens from 7 to 28 days of age.

          1. The effect of the dietary inclusion of 5 culinary herbs or their essential oils on the growth, digestibility and intestinal microflora status in female broiler chicks was assessed. From 7 to 28 d of age, either a basal control diet without supplement was given or one of 10 others, consisting of the basal diet with either 10 g/kg herb (thyme, oregano, marjoram, rosemary or yarrow) or 1 g/kg of essential oil. 2. Body mass (BM) and feed consumption (AFC) were measured on a weekly basis and used to calculate chick performance. Total viable counts of lactic acid bacteria, coliforms, anaerobes and Clostridium perfringens were determined at 25 d. Apparent nutrient digestibilities were calculated from the measured values for gross energy, nitrogen (N), dry matter (DM) and organic matter, and sialic acid concentration was also measured. 3. Generally, dietary thyme oil or yarrow herb inclusion had the most positive effects on chick performance, while oregano herb and yarrow oil were the poorest supplements. Only thyme and yarrow in these diets had a different effect when used as a herb or oil on weight gain and BM. 4. Dietary treatment had no effect on the intestinal microflora populations, apparent metabolisable energy (AME) or the calculated coefficients of digestibility. Sialic acid concentration was greatest in the birds given dietary thyme oil, compared with all other treatments except those birds receiving marjoram oil, rosemary herb and the controls. However, less sialic acid was excreted in those birds given diets with oregano or rosemary oils, or oregano herb, than in the controls. 5. Plant extracts in diets may therefore affect chick performance, gut health and endogenous secretions, although the chemical composition of the extract appears to be important in obtaining the optimal effects.
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            Effects of ginger root (Zingiber officinale) processed to different particle sizes on growth performance, antioxidant status, and serum metabolites of broiler chickens.

            A study using 144 one-day-old Arbor Acres broilers was conducted to assess the effects of dried ginger root (Zingiber officinale) that was processed to particle sizes of 300, 149, 74, 37, and 8.4 microm on growth performance, antioxidant status, and serum metabolites of broiler chickens. The birds were housed in 24 wire cages in an environmentally controlled room. Dietary treatments were no supplementation (control) and supplementation with ginger root processed to 5 particle sizes at the level of 5 g/kg of diet. Average daily gain, ADFI, and feed conversion rate of chicks of each cage were measured weekly. Blood samples from 8 broilers per treatment were obtained at d 21 and 42 of the experiment to determine antioxidant enzymatic activities and metabolites in the serum, and the birds were subsequently killed to determine carcass yield and abdominal fat content. All broilers had similar ADFI or feed conversion rate over the entire experimental period. However, broilers supplemented with ginger powder tended to have higher ADG and had greater (P=0.014) carcass yield compared with that of the control. Supplementation of ginger increased (P<0.001) activities of total superoxide dismutase and glutathione peroxidase but reduced (P<0.01) concentrations of malondialdehyde and cholesterol in serum of broilers at 21 and 42 d of age. Concentration of total protein in serum of ginger-supplemented broilers tended (P=0.092) to be higher at 21 d and was higher (P=0.002) at 42 d of age compared with that of control broilers. Reducing particle size of ginger powder linearly reduced (P<0.05) cholesterol (d 21) and linearly increased (P<0.05) glutathione peroxidase (d 21), total superoxide dismutase (d 42), and total protein (d 21 and 42). Supplementation of ginger at the level of 5 g/kg improved antioxidant status of broilers and the efficacy was enhanced as the particle size was reduced from 300 to 37 microm.
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              Low-protein amino acid-supplemented diets in broiler chickens: effects on performance, carcass characteristics, whole-body composition and efficiencies of nutrient utilisation

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                Author and article information

                Contributors
                Role: ND
                Journal
                sajas
                South African Journal of Animal Science
                S. Afr. j. anim. sci.
                The South African Society for Animal Science (SASAS) (Pretoria, Gauteng, South Africa )
                0375-1589
                2221-4062
                2019
                : 49
                : 5
                : 868-873
                Affiliations
                [01] Amman orgnameThe Jordan University orgdiv1Faculty of Agriculture orgdiv2Department of Animal Production Jordan
                Article
                S0375-15892019000500009
                10.4314/sajas.v49i5.9
                baf15c07-ea75-4c2e-8c06-c6c31f527ae1

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 18 April 2019
                : 04 July 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 33, Pages: 6
                Product

                SciELO South Africa

                Categories
                Articles

                Antimicrobial activity,Meat Quality,Growth performance

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