Document Type : Research Paper

Authors

1 M.Sc. Student, Department of Animal nutrition, Faculty of Animal Sciences, Agricultural Science and Natural Resources University of Gorgan, Iran

2 Professor, Department of Animal Nutrition, Faculty of Animal Sciences, Agricultural Science and Natural Resources University of Gorgan, Iran

3 Assistant Professor, Department of Animal Physiology, Faculty of Animal Sciences, Agricultural Science and Natural Resources University of Gorgan, Iran

4 Ph.D. Student, Department of Animal Nutrition, Faculty of Animal Sciences, Agricultural Science and Natural Resources University of Gorgan, Iran

Abstract

The effect of feeding fermented cottonseed meal on performance, carcass characteristics and blood serum lipid profile was studied in a completely randomized design with five treatments, five replicates and 12 birds per replication using 300 male Ross 308 broiler chicks. Raw cottonseed meal was fermented with a liquid mixed culture containing Bacillus subtilis, Aspergillus niger and Aspergillus oryzae with a ratio of 1:1.2. After seven days of fermentation, free gossypol was reduced from 584.33 to 68 mg/kg. The experimental treatments included replacing 0, 10, and 20 percent of the raw or fermented cottonseed meal by the soybean meal in the diet. The use of fermented cottonseed meal in the diet improved weight gain and feed conversion ratio of broilers compared to the raw cottonseed meal (P<0.05). At 21 and 42 d, weight gain and feed conversion ratio of the birds fed diets containing 10 and 20 percent of fermented cottonseed meal did not have a significant difference with the birds fed by the control diet. Abdominal fat was lower in birds fed diets containing fermented cottonseed meal compared with the others (P<0.05). Serum concentrations of cholesterol and triglyceride were significantly lower for the birds fed by diets containing fermented cottonseed meal, compared with the other groups (P<0.05). Based on the results, the use of fermented cottonseed meal improves the performance and health of broiler chickens compared to the raw cottonseed meal.

Keywords

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