ArticleVeterinary medicine and science2026
Effects of Digestible Arginine Supplementation in Low-Crude-Protein Diets on Productive Performance, Egg Quality Traits and Immune Response in Breeding Japanese Quails.
Article in Veterinary medicine and science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundDietary crude protein is one of the most expensive components of poultry diets. Arginine, an essential amino acid, plays key roles in metabolism, immunity and reproduction.
objectivesThis study evaluated the effects of digestible arginine (dArg) supplementation in a low-crude-protein diet on productive performance, egg quality traits, blood metabolites and immune response in breeding Japanese quails.
methodsA total of 450 ten-week-old Japanese quails were allocated to a completely randomized design with six dietary treatments and five replicates per treatment (12 females and 3 males per replicate). A low-crude-protein basal diet (16.5% CP) deficient in arginine was supplemented with graded levels of L-arginine to achieve dietary dArg levels of 1.11%, 1.16%, 1.21%, 1.26%, 1.31% and 1.36%.
resultsDietary dArg up to 1.36% did not affect egg production, egg weight, feed intake, or feed conversion ratio (p > 0.05). However, body weight gain increased linearly (p < 0.05), with the highest value observed at 1.36% dArg. Haugh unit showed a positive linear trend (p < 0.05), suggesting a potential improvement in albumen quality, while other egg quality traits remained unchanged. Immune response, blood metabolites, fertility and hatchability were not affected by dietary treatments.
conclusionsA concentration of 1.36% digestible arginine in low-crude-protein diets improved body weight gain and albumen quality without affecting overall productive performance, reproductive traits or immune response in breeding Japanese quail.
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