Journal of Animal Production, Print ISSN: 2008-6776., Online ISSN: 2382-994X

Effect of different levels of rapeseed oil and garden thyme essential oil on performance, immune traits and intestinal morphology of broiler chickens

Document Type : Research Paper

Authors

Mohammad Ali Abbasi 1
shokoufe ghazanfari 2
seyed davood sharifi 1
Hassan Ahmadi Gavlighi 3

1 Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Pakdasht, Tehran-Iran

2 Department of Animal and Poultry Sciences, College of Aburaihan, University of Tehran, Pakdasht, Tehran-Iran

3 Department of Food Science and Technology, Faculty of Agriculture, Tarbiat Modares University

https://doi.org/10.22059/jap.2021.306922.623549
Abstract
The effect of garden thyme essential oil (TEO) and rapeseed oil (RO) on performance, immune traits and intestinal morphology using 432 one-day-old  Ross 308 male broiler as a (3x3) factorial experiment in a completely randomized design including different levels of TEO (0, 300 and 500 ppm) and RO (1, 3 and 5 percentage) were evaluated with 9 treatments and 4 replicates. Throughout the rearing period, broiler chickens receiving 3% gained more weight than 1% of RO and chickens receiving 300 ppm gained more weight than those without TEO (P˂0.05). The use of 3% RO + 300 ppm TEO increased the thigh percentage compared to 1% RO. At 1 and 5 percentage levels of RO, with increasing levels of TEO in the diet, blood cholesterol and LDL concentrations decreased and blood HDL increased (P<0.01). Levels of 3% and 5% of RO + 300 and 500 ppm of TEO in broiler chicken diets increased lymphocyte percentage and antibody titer against Newcastle disease and decreased heterophil percentage and heterophil to lymphocyte ratio of blood (P<0.05). Broiler chickens receiving diet containing TEO had the highest ratio of villi height to crypt depth (P<0.01). Based on the results, the level of 3% rapeseed oil + 300 ppm thyme essential oil in the diet of broiler chickens can be used to improve performance, immunity and biochemical traits of blood.

Keywords

Antioxidant
Broiler chickens
Essential oil
Immune system
Intestinal morphology
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Journal of Animal Production, Print ISSN: 2008-6776., Online ISSN: 2382-994X
Volume 23, Issue 3
Summer 2021
Pages 395-408

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