Feeding value of rice distiller’s dried grains with solubles as protein supplement in diet of laying hens
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A feeding trial of 10 weeks duration was undertaken on laying hens (n = 240) to evaluate feeding value of rice distiller’s dried grains with soluble (rDDGS) with or without enzyme supplementation (α-amylase, β-glucanase, xylanase, carboxymethylcellulase, pectinase, proteinase, α-galactosidase, β-galactosidase, lipase, and phytase), following 4 × 2 factorial design, on egg production, nutrient utilization, and cost economics of egg production. The birds were randomly assigned to eight dietary treatments with 30 birds/treatment. The birds were housed individually in layer cages and each bird was taken as an experimental unit. Eight experimental diets were prepared by incorporating four levels (0, 50, 75, and 100 g/kg) of rDDGS with and without enzyme supplementation. The results revealed a significant (P < 0.01) increase of egg mass, feed intake, egg production, and body weight gain in dietary treatments with up to 75 g rDDGS though the values were statistically similar to the hens fed 100 g rDDGS. Enzyme supplementation resulted in significant (P < 0.01) improvement of egg mass, egg production, feed conversion ratio (FCR) per dozen eggs, FCR per kilogramme egg mass, and net FCR. The significantly (P < 0.01) higher yolk index was observed at 100 g rDDGS level, while shell thickness improved significantly (P < 0.01) up to 75 g rDDGS level. No significant effect of rDDGS inclusion was observed on shape index, albumin index, and Haugh unit. Enzyme supplementation significantly improved the shell thickness and yolk colour of eggs. Nitrogen, calcium, and phosphorus retention and dry matter metabolizability did not show any significant treatment effects. There was significant (P < 0.01) reduction in feed-cost per kilogramme egg mass or per dozen eggs with the increased DDGS levels and dietary enzyme supplementation. It was concluded that rDDGS can be used up to 100 g/kg diet of laying hens along with enzyme supplementation for better productivity of layer hens.
KeywordsDDGS Egg production Egg quality Feed utilization Economics
The authors are sincerely thankful to the Department of Science & Technology, Govt. of India, for providing DST-INSPIRE fellowship to the first author for her Ph.D. research. The research did not receive any specific funding from any agency.
This work did not receive financial support from any agency
Compliance with ethical standards
The experimental procedures on the birds were carried out in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. The approval number of the research work, provided by the Institutional Animal Ethics Committee (IAEC) of Indian Veterinary Research Institute Izatnagar, is (341/05/ab18/CPCSEA).
Conflict of interest
The authors declare that they have no conflict of interest.
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