Morteza Pashaei jalal; Anahita Bahrami babaali; Fatemeh Tabandeh; Seyed Davood Sharifi
Volume 25, Issue 4 , December 2023, , Pages 429-443
Abstract
Effect of different sources of probiotic and prebiotic on growth performance, carcass characteristics, intestinal microflora, and blood metabolites using 720 Ross 308 commercial male broiler chickens in a 3×3 factorial experiment with three levels of probiotic (without probiotic, probiotic type ...
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Effect of different sources of probiotic and prebiotic on growth performance, carcass characteristics, intestinal microflora, and blood metabolites using 720 Ross 308 commercial male broiler chickens in a 3×3 factorial experiment with three levels of probiotic (without probiotic, probiotic type I and type 2) and three levels of prebiotic (without prebiotic, prebiotic type 1 and type II), in a completely randomized design with nine experimental groups (four replications and 20 birds were studied in each replication. Birds that were fed with diets containing type 2 probiotics had a lower conversion factor (P<0.05). Diets containing prebiotic type 1 as well as diets containing probiotic type II and diets containing probiotic type II and two prebiotics under test reduced serum cholesterol and LDL concentrations (P < 0.05). The effect of the experimental treatments on carcass fat was not significant, but the birds fed diets containing prebiotic type 1 had less abdominal fat (P<0.05). At 21 days old, the population of ٍ E. coli in the ileum and ceca of birds that received probiotics, prebiotics, and their combinations decreased (P < 0.05). At 38 days of age, feeding the birds with probiotics and prebiotics and a combination of them reduced the population of E. coli in the ceca and increased lactobacillus in the ileum (P < 0.05). The results of this experiment showed that probiotics or prebiotics assayed in this study have positive effects on the increase of beneficial intestinal bacteria (Acid lactic bacteria), blood biochemical traits, and FCR in broiler chickens.
Mohammad Reza Rezvani; Razieh Iranparast
Volume 22, Issue 1 , March 2020, , Pages 129-142
Abstract
The aim of this research was to study the effect of adding enzyme preparations and ration formulation on performance, nutrient digestibility and intestinal microflora of broilers. Two hundred and fifty six day-old male and female broiler chicks of Ross 308 strain were used in a 2×2×2 ...
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The aim of this research was to study the effect of adding enzyme preparations and ration formulation on performance, nutrient digestibility and intestinal microflora of broilers. Two hundred and fifty six day-old male and female broiler chicks of Ross 308 strain were used in a 2×2×2 factorial experiment consisting of two methods of diet formulation (total and digestible amino acid), two levels of Natuzyme Plus (0 and 0.035%) and two levels of Multi-behzyme (0 and 0.02%) as additives. The factors were arranged as a completely randomized design with eight treatments and four replications. Diet formulation based on total amino acids improved the average daily gain (ADG) and feed conversion ratio (FCR) during the grower and finisher and total periods, but decreased daily feed intake during the finisher and total periods (P ≤ 0.05). It also increased dry matter digestibility, dressing percentage and intestinal length, but it decreased fat digestibility (P ≤ 0.05). Natuzyme Plus increased dry matter, crude protein and fat digestibility and decreased the number of E .coli in the cecum. (P ≤ 0.05). Multibehzyme improved ADG during the grower period, FCR during the finisher period and total period and it increased dry matter, crude protein and crude fat digestibility (P ≤ 0.05). It was concluded that Multi- behzyme could be replaced with Natuzyme Plus, and its inclusion in the diets formulated by digestible amino acid and low protein content can improve the negative outcome of low level protein diets.