Document Type : Research Paper

Authors

1 Ph.D Student of Animal Nutrition, Gorgan University of Agricultural Sciences and Natural Resources

2 Associate Professor, Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources

3 Professor, Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources

4 Assistant Professor, Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources

Abstract

The use of sesame meal in poultry feed is limited due to the anti-nutritional factor of phytic acid and the lack of secretion of the phytase enzyme in the gastrointestinal tract. For this purpose, enzyme supplements or phytase-producing microorganisms can be used to break down phytate. The purpose of this experiment was comparing the effects of raw and processed sesame meal by solid-state fermentation on performance, carcass characteristic, and intestinal morphology in broiler chickens. sesame meal was fermented with a liquid mixed culture containing Lactobacillus plantarum in a ratio of 1:1.2. After 25-day fermentation, phytic acid was reduced from 17.39 to 5.26 mmol/g. A total of 315 Ross-308 broilers in a completely randomized design were allocated to 7 treatments with 3 replicates. Experimental treatments were containing 25, 50 and 75% raw or/and fermented sesame meal replaced by soybean meal in diets. The results show that levels of 25 and 50% fermented sesame meal compared with raw sesame meal improved broilers performance (P<0.05). Abdominal fat was significantly lower in treatments of 50% and 75% fermented sesame meal compared to other treatments (P<0.05). Villi in the duodenum and jejunum of the birds fed on diets containing 25 and 50% fermented sesame meal were significantly higher than for the other experimental groups (P<0.05). Considering the similarity of the results of control treatments and 50% fermented sesame meal in weight gain and feed conversion ratio, the use of fermented sesame meal is suggested up to 50% replacement level with soybean meal in the diet.

Keywords

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