The effects of different levels of green grape (Vitis vinifera L.) leaves on performance, egg traits and blood metabolites of laying hens

Document Type : (original research)

Author

Department of Animal Science, Maragheh Branch, Islamic Azad University, Maragheh, Iran

10.22034/AEJ.2021.289447.2555

Abstract

An experiment was conducted to evaluate the effects of using different levels of green grape leaves on performance, egg quality, blood biochemical and immunity parameters of laying hens. Experiment was carried out in a completely randomized design with 192 laying hens (Hy LineW-36) in 4 treatments and 4 replicates from 65 to 72 weeks. Experimental diets included: 1) control group with no green grape leaves, in 2 until 4 treatments the level of green grape leaves were 1.5, 3, and 4.5%. Adding green grape leaves into laying hens diets significantly affected their performance, egg quality traits, blood biochemical and immunity parameters (P<0.05). The highest amounts of egg production percentage, egg mass, feed intake, the best feed conversion ratio and the lowest price for production per kilogram of egg, the lowest level of blood uric acid were resulted by using 3% green grape leaves. Yolk color index, eggshell, albumin and egg yolk weights improved by using 4% green grape leaves, whereas the eggshell thickness decreased. In contrast with control group, the count of white blood cells by using green grape leaves increased. The overall results showed that using 3% green grape leaves significantly improved the performance and reduced the feed price for production per kilogram of egg in laying hens.

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References

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Journal of Animal Environment
Volume 14, Issue 3
October 2022
Pages 133-138

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