Effect of oregano (Oreganum syriacum L.) essential oil and cage density on performance parameters, egg quality criteria, some blood biochemical parameters, blood antioxidant capacity, and intestinal histopathology in laying hens
1 Ataturk University, Faculty of Veterinary Medicine, Department of Animal Nutrition and Nutritional Diseases, Erzurum, Turkey.
2 Ataturk University, Faculty of Agriculture, Department of Feeds and Animal Nutrition, Erzurum, Turkey.
3 Ataturk University, Faculty of Veterinary Medicine, Department of Biochemistry, Erzurum, Turkey.
4 Hatay Mustafa Kemal University, Faculty of Veterinary Medicine, Department of Animal Nutrition and Nutritional Diseases, Hatay, Turkey.
Research Article
GSC Biological and Pharmaceutical Sciences, 2020, 13(02), 136-145.
Article DOI: 10.30574/gscbps.2020.13.2.0370
Publication history:
Received on 10 November 2020; revised on 18 November 2020; accepted on 19 November 2020
Abstract:
Although many methods have been developed in order to reduce the negative effects in laying hens reared at high cage density, researches on effects of dietary supplementation of oregano (Oreganum syriacum L., OEO) essential oil as a feed additive to the diets are extremely sparse. This study investigated the effects of OEO and caging density on performance parameters, egg quality criteria, some blood biochemical parameters, blood antioxidant capacity, and intestinal histopathology of laying hens. We used 276 white Lohmann laying hens aged 38–40 weeks in the experiment. The animals were divided to positive control (600 cm2 hen/cage, PC), negative control (360 cm2 hen/cage, NC), negative control+ 200 mg/kg OEO (NC+O2), negative control+ 400 mg/kg OEO (NC+O4), and negative control+ 600 mg/kg OEO (NC+O6). In this study, it was determined that egg weight and egg shell weight increased at higher caging density, but they did not change with dietary supplementation of OEO. In addition, the plasma calcium and phosphorus decreased with the higher caging density and dietary supplementation of OEO. Supplemented OEO to the diets of the laying hens reduced lipid peroxidation and improved antioxidant capacity and intestinal histopathology of laying hens. As a result, it was determined that OEO decreased the negative effects of high caging density. While this positive effect was found to be at a maximum dose at 400 mg/kg of OEO, it was determined that a dose of 600 mg/kg of OEO had a toxic effect, if even numerically.
Keywords:
Caging Density; Duodenum; Egg; Laying Hens; Oregano.
Full text article in PDF:
Copyright information:
Copyright © 2020 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0
