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It was also determined that a considerable part of volatile compounds is formed by lipid oxidation. Three hundred crossbred chickens (at age of 11 wk) were randomly housed in 15 open-sided deep litter pens with 20 chickens in each pen under completely randomized design for a period of 9 wk. Before evaluating their hematobiochemical and carcass characteristics, the birds were provided with grower mash ad libitum throughout the experimental period. Blood samples were taken from each genotypic group (nanaff, Nanaff, and NanaFf), when the birds were 18 and 20 wk old, respectively, for the evaluation of hematobiochemical parameters. At the end of the trial, 15 chickens from each of the 3 genotypic groups were randomly selected and slaughtered to determine the carcass parameters. The findings from the study revealed that except for total cholesterol, spleen, and neck weight, there was no significant genotypic effect (P > 0.05) on hematobiochemical and carcass parameters measured. The nanaff genotype birds had significantly higher (P 0.05). Also, hematobiochemical assays of all the birds were within normal range. From a health point of view, the indigenous naked neck genotype seems superior because its fat and cholesterol contents were low. Thus, it is strongly recommended that there should be a conscious effort to develop and commercialize the naked-neck and frizzled birds especially in developing countries. This study was conducted to determine the effect of probiotic Pediococcus acidilactici (PA) strain MA18/5M supplementation of diets with different dietary energy levels on productive performance, egg quality, and body composition in Hy-Line Brown hens during a 16-week period from 32 to 47 wk of age. The experimental treatments with a 2 × 2 factorial design received a 2 wheat-corn-soybean diet a moderately low energy density diet with 2,650 kcal ME/kg (M-LED) and a low energy density diet based on the M-LED diet with 2,550 kcal ME/kg (LED), each diet without and with probiotic supplementation (M-LED, LED, M-LEDp, and LEDp, respectively). Reduced dietary energy levels had a particularly negative effect on egg weight (61.7 vs. 63.3 g; -2.6%, P less then 0.001), egg mass output (1.67 vs. 1.71 kg; -2.4%, P = 0.015), and FCR (2.01 vs. 1.97 kg feed/kg egg; +2%, P = 0.028). In hens administered the LED diet, deteriorated productive performance was accompanied by greater body weight loss (P less then 0.001) and reduced abdominal fat content (P less then 0.033) as compared with the M-LED group. Dietary probiotic inclusion increased egg weight (P = 0.015), including relative eggshell weight (P = 0.008) and eggshell thickness (P = 0.002) and significantly improved FCR (P = 0.010). No interactions between the PA-based probiotic and dietary energy levels were found in any of the tested parameters. Adding the probiotic on top of the M-LED diet improved layers performance but resulted in nonbioequivalence for the egg weight, egg mass output, and FCR compared with this group without probiotic. Probiotic supplementation of the LEDp diet improved all performance parameters except for egg weight. As a result, the laying rate, egg mass output, daily feed intake, and FCR in the LEDp treatment were bioequivalent to those noted in the M-LED group without the probiotic. The results of a bioequivalence test suggest that a low energy diet fed to laying hens promoted a probiotic response to improve energy utilization by birds. A 2 × 6 factorial experiment was conducted to evaluate the effect of Satureja khuzistanica essential oils (SkEO; 0, 200, 300, 400, 500, and 600 mg/bird/day) administered via oral gavage and dietary acetic acid (AA; 0 and 20 g/1 kg) on fatty acids (FA) composition in thigh meat of Ross 308 broiler chickens at days 34, 38, and 42 of age. Dietary AA reduced DWG, DFI, and European economic efficiency index, and increased FCR compared with the nonacidified diet. https://www.selleckchem.com/products/azd3229.html In day 34 of age, saturated FA (SFA) percentage reduced and polyunsaturated FA (PUFA), n-3, and n-6 percentages increased in the birds that received 400 mg SkEO. Mean monounsaturated FA (MUFA) percentage was greater, whereas PUFA, n-3, n-6, and total FA (TFA) percentages were lesser in the birds fed on the acidified diet. In day 38 of age, mean PUFA, TFA, n-3, and n-6 percentages were greater while MUFA and cis FA (CFA) concentrations were lesser in the thigh muscle of the birds that received 400 mg SkEO. Mean MUFA, PUFA, n-3, n-6, CFA, and TFA percentages were lower in the birds maintained on the acidified diet. In day 42 of age, mean SFA percentage reduced in the birds given 300 mg SkEO, while TFA percentage lowered in the birds that received 200 and 600 mg SkEO. The acidified diet decreased MUFA, TFA, and CFA percentage and increased SFA and the n-6 to n-3 fatty acids ratio of thigh meat in chicken. The results led to the conclusion that the daily enteral administration of SkEO through oral gavage may feasibly modify the fatty acids profile of thigh meat in favor of increased PUFA. Dietary AA and its interaction with SkEO inconsistently modified concentration of certain classes of fatty acids in broiler thigh meat, particularly in advanced ages. Almost all alterations induced by AA-involving treatments in fatty acids composition of thigh meat were on the contrary to the SkEO influences as they were in favor of an increased SFA proportion. The aim of this study was to determine the effect of addition of alfalfa protein concentrate (APC) at the dose of 15 g or 30 g per 1 kg of complete feed ration for the native Polbar breed on selected production traits and the fatty acid profile in the yolk of raw, hard-boiled or freeze-dried eggs. Laying hens were assigned randomly to 3 experimental groups, each comprising 30 birds. The control group received a standard diet without the APC addition and the experimental groups received APC, which partially replaced postextraction soybean meal. Egg laying performance, feed intake, and feed conversion ratio were controlled throughout the experiment. At 33 wk of age, 45 eggs were randomly selected for assessment of the quality of the egg content and eggshell, and 30 eggs were taken for each of the cooking and freeze-drying treatments. The fatty acid composition was determined in the yolks of hard-boiled, freeze-dried, and raw eggs. There was no effect of the APC addition on the laying performance, feed intake and feed conversion ratio, and a majority of egg quality traits.
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