Document Type : Research Paper
Authors
1 University student. Animal Science Department, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
2 Associate Professor. Animal Science Department, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
3 Associate Professor. Department of Agronomy and Plant Breeding, Razi University, Kermanshah, Iran
4 Associate Professor. Department of Plant Protection, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
Abstract
The majority of energy sources in poultry diets are corn and wheat, but, Wheat due to availability could be considered as a suitable replacement for corn in the diets of broilers and laying hens in many countries On the other hand, wheat contains soluble non-starch polysaccharides, including non-starch polysaccharides (NSP), which the inclusion level of wheat is limited.The arabinoxylans are the main NSP in wheat that increasing the viscosity of the digesta and reducing nutrient digestibility direct-fed microbial (DFM) supplements include Bacillus velezensis, Trichoderma, and Saccharomyces cerevisiae, which are used as biological control agents due to their high ability to suppress disease agents and inhibit the proliferation of intestinal pathogens.
Materials and Methods: The total number of 240 Hy-Line W-36 laying hens were randomly distributed between 40 cages, and the five experimental diets including (A) corn-soybean meal-based control diet, (B) wheat-based diet with no microbial additive, (C) wheat-based diet with 1×109 cfu/kg Bacillus velezensis, (D) wheat-based diet with 1×105 cfu/kg Trichoderma and (E) wheat-based diet with B. velezensis + Trichoderma were assigned to hens with 8 replicate cages per diet and 6 hens per each replicate.
Results and Discussion: Increased egg production (EP), feed intake (FI), improved feed conversion ratio (FCR) and decreased pH of jejunum, ileum and caecum were observed in layers fed the diet included B. velezensis + Trichoderma (P<0.05). the direct-fed microbials enhanced the efficiency of nutrient adsorption and utilization, predominantly ascribable to the production of exogenous enzymes by the test probiotic.
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