Effect of physical form of the diet and the type of probiotic on Performance, carcass characteristics and acidity of the contents of the gastrointestinal tract of broiler chicks

Document Type : Research Paper

Authors

1 Assistant Professor, Animal Science Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran.

2 Animal Science Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran.

3 Razi Vaccine and Serum Research Institute, Shiraz Branch, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran.

4 Assistant Professor, Animal Science Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran (Corresponding author

5 ِِDepartment of Animal Science, Higher Educational Complex of Saravan, Saravan , Sistan and Baluchestan, Iran

Abstract

The aim of this study was to investigate the effect of physical form of the diet and the type of probiotic on performance, carcass characteristics and acidity of the small intestine and cecum contents of broilers (from 1 to 42 days of age). Seven hundred and twenty day old Ross broilers were randomly distributed to 24 experimental units and 6 dietary treatments (4 replicates with 30 birds in each). The completely randomized design with factorial arrangement 2×3 with two forms of feed (mash and pellet) and three modes of using probiotic (without probiotic, probiotics Protoxin and Multi Behsil) were used. The results showed that pelleting diets resulted in greater feed intake (FI), weight gain (WG) and improved feed conversion ratio (FCR) during starter, grower and overall period (p < 0.01). The use of Protexin compared to the absence of probiotics resulted in a significant increase in WG (56.31 vs. 53.78 g/bird/day) and improved FCR (1.61 vs. 1.73) (p < 0.05). The use of probiotic supplementation in the diet caused a significant increase in the breast percentage (22.62 and 21.5 vs. 20.63) and decrease in the pH of duodenum (5.57 and 5.59 vs. 5.83), jejunum (5.95 and 5.92 vs. 6.16) and ileum (6.58 and 6.91 vs. 6.98), respectively (p < 0.05). Based on the results of this study, it can be concluded that the use of probiotic in pellet diets has led to improved breeding performance of broiler chickens compared to mash form diet. In this regard, Protexin compared to the Multi Behsil probiotic showed higher efficacy.

Keywords

References

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Animal Sciences Journal
Volume 33, Issue 129
March 2021
Pages 101-112

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