Article abstract

Journal of Agricultural and Crop Research

Research Article | Published July 2017 | Volume 5, Issue 2, pp. 25-31

 

The effects of dietary supplementation levels of valine on performance and immune System of broiler chickens

 


 

 

Murat Kaplan1*

Gültekin Yildiz2

 

Email Author

Tel: +90 544 232 84 82.

 

1.     Virology Department, İzmir/Bornova Veterinary Control Institute, Erzene Mah. Ankara Cad. No:172/155 35040, Bornova, İzmir, Turkey.


2.    Animal Feeding and Nutritional Diseases Department, Veterinary Faculty of Ankara University, İrfan Baştuğ Cad. 06110, Dışkapı, Ankara, Turkey.


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Citation: Kaplan M, Yildiz G (2017). The effects of dietary supplementation levels of valine on performance and immune System of broiler chickens. J. Agric. Crop Res. 5(2): 25-31.

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 Abstract 


The aim of this work was to evaluate the effects of adding different levels of valine in broiler diets on broiler performance, weights of immune system organs, that is, thymus, bursa of Fabricius and spleen. Also, measure the antibody titers of birds due to feeding diets containing different levels of valin for different feeding periods. Five dietary treatments groups (Control, D1, D2, D3 and D4) each containing 49 birds were arranged. The valine levels of the control group were 0.9% for 0 to 21 days and 0.82% for 21 to 42 days as recommended by NRC (1994). D1 and D2 groups were 0.9% for 0 to 21 days as recommended by NRC (1994) and 0.92 and 1.02% valine upper value of 0.1 and 0.2% recommended by NRC (1994) for 21 to 42 days. D3 and D4 groups were 1 and 1.1% valine upper value of 0.1 to 0.2% recommended by NRC (1994) for 0 to 21 days, 0.82% for 21 to 42 days as recommended by NRC (1994). Different dietary valine levels in different feeding periods did not create any statistical difference except numerical differences on performance (P > 0.05) when all study periods were taken into account. Spleen and bursa of Fabricius were not observed to be affected by various dietary valine levels (P > 0.05), but there was significant statistical difference in thymus development on either 0 to 21 days or 21 to 42 days in groups fed with ratio containing 1% valine level (P<0.05). In terms of humoral immunity, although the highest degree of vaccination antibody titers were achieved in groups fed with a ratio containing 1.1% valine level, this was not considered to be statistically significant. It is recommended as a result of this study that, the optimal value of valine in broiler ratios were evaluated to be 1% for 0 to 21 days in contrast to NRC (1994) recommendations and 0.82% for 21 to 42 days as recommended by NRC (1994).

Keywords  Amino acid   broiler performance   immune response   valine  

 

 

 

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