İçme Suyu Katkısı Olarak Kullanılan Myrtus communis L. Bitki Özütünün Yaşlı Yumurtacı Tavuklarda Performans, Bazı Kan Parametreleri, Yumurta Kalitesi ve Bağışıklık Tepkisi Üzerine Etkileri

Abstract

The aim of the present study was to evaluate the effects of myrtle plant extract (MPE) on performance, some blood parameters, egg quality and immune response of older laying hens. A total of 192 laying hens (67 weeks old; initial body weight 1.63±0.17 kg) were used in this study. The MPE was added to the water of the experimental groups (0%, 2.5%, 5.0%, or 10%) for 8 weeks. Liquid chromatography analyses showed that myricetin was the predominant active ingredient (15.34 mg/L) in MPE. In treatment groups, feed consumption, egg mass (P<0.05), egg production (P<0.01) increased (10% MPE) and water consumption ascended (5% MPE) compared to the control birds. Feed conversion ratio did not change. In 2.5% MPE group, greater egg weight (P<0.001) and darker egg yolk (P<0.01) were observed than the control birds. Regarding immunity, the 5% Myrtus group produced higher neutrophil and large amounts of IgG (P<0.05) indicating that significant results were also observed in the immunological response of laying hens vaccinated against the Newcastle virus. Serum alanine aminotransferase level increased (P<0.05) in treatment groups whereas serum glucose levels decreased significantly (P<0.01). Other than that, none of the blood parameters changed. It is concluded that Myrtus communis L. plant extract showed positive effects on the egg yolk, some performance parameters and immune system of older laying hens without any adverse effects on egg traits.

Effect of Myrtus communis L. Plant Extract as a Milk Supplement on the Performance, Selected Blood Parameters and Immune Response of Holstein Calves

“…There was no effect on the artificial insemination and conception rate ( Table 4 ). Previous studies have reported similar positive effects, such as increased feed consumption and egg production in laying hens when myrtle plant extract was added to drinking water at different concentrations [ 12 ]. Consistent with these findings, Bardzardi et al [ 10 ] observed increased feed consumption and live weight in broilers when myrtle extract was added to the rations.…”

“…Administering different amounts of myrtle plant extract with milk to calves resulted in reduced blood glucose values in the MPEL-50 and MPER-50 groups. In a similar study [ 12 ], blood glucose concentration in laying hens, where 2.5%, 5% and 10% of myrtle plant extract were added to their drinking water, were found to be lower in all trial groups compared to the control group. Researchers attribute the hypoglycemic effect observed in the experimental groups to myricetin, the most abundant active ingredient in the myrtle plant extract.…”

“…Clinical and experimental studies have demonstrated its antioxidative, anticancer, antioxidant, antibacterial, antifungal, hepatoprotective, anti-diabetic, antiviral properties, as well as neuroprotective activity [ 8 , 9 ]. In recent years, the oils and extracts of the myrtle plant have been utilized to enhance performance in broilers [ 10 , 11 ], laying hens [ 12 ], rabbits [ 13 ] and rats [ 14 , 15 ]. Additionally, it has been employed as a chemotherapeutic agent in quails [ 16 ].…”