Koohrang Nature's Gold (KNG) Company, Mashhad, Iran.
Department of Agriculture, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran.
Vet Med Sci. 2024 Sep;10(5):e1587. doi: 10.1002/vms3.1587.
Vitamin D possesses an important role in the maintenance and health of broiler chickens. Herbal essential oils (EOs) have been proposed as a suitable alternative to chemical drugs in intensive production management systems for better performance of broilers with slight side effects and admirable therapeutic properties.
This experiment was conducted to investigate the effects of feeding cholecalciferol (VD) in combination of Satureja rechingeri EO (SREO) on growth performance, haematological indicators and immunological response of broilers.
A total of 540 1-day-old mixed-sex broiler chickens (Ross 308) were used in a completely randomized design with a 3 × 3 factorial arrangement of treatments. Experimental treatments included different concentrations of cholecalciferol (VD) (0, 2000 and 4000 IU/kg = 0, 0.05 and 0.1 mg/kg) and SREO (0, 200 and 400 mg/kg) on growth performance, haematological indicators and immunological responses of broiler chickens were investigated.
The results showed that the chicken fed diet supplemented with 0.1 mg/kg VD (VD) in combination of 200 mg/kg SREO (SREO) increased the feed intake during the overall and first 14-day periods of the trial when compared with other dietary treatments. Interaction of VD × SREO led to more body weight gain (BWG) in the grower and finisher phases than all other feed treatment groups. The blood level of lymphocyte at day 42, heterophil at days 28 and 42 and heterophil/lymphocyte (H/L) ratio at 14 and 28 days of age were affected by VD + SREO in comparison with VD + SREO group. Feeding VD and/or SREO decreased triglyceride, cholesterol and low-density lipoprotein concentrations at days 28 and 42 of the study, especially in VD + SREO treatment. Feeding VD + SREO also resulted in higher serum status of immunoglobulin M, lysozymes and phagocytic percentage among all treatments.
Considering the outcomes, it is suggested that the combination of suitable concentration of VD and EO of the plant had favourable effects on the immune system and performance criteria of broiler chickens.
维生素 D 在维持和肉鸡健康方面起着重要作用。草药精油（EO）已被提议作为化学药物在集约化生产管理系统中的替代品，以更好地提高肉鸡的性能，副作用轻微，具有令人钦佩的治疗特性。
本试验旨在研究胆钙化醇（VD）与 Satureja rechingeri EO（SREO）联合喂养对肉鸡生长性能、血液指标和免疫反应的影响。
采用完全随机设计，设 3 个维生素 D（VD）浓度（0、2000 和 4000 IU/kg=0、0.05 和 0.1 mg/kg）和 3 个 SREO 浓度（0、200 和 400 mg/kg）3×3 因子处理，研究不同浓度的胆钙化醇（VD）和 SREO 对肉鸡生长性能、血液指标和免疫反应的影响。
结果表明，与其他日粮处理相比，日粮中添加 0.1mg/kg VD（VD）+200mg/kg SREO（SREO）的鸡在整个试验和第 14 天的采食量增加。VD×SREO 的相互作用导致生长期和育肥期的体重增加（BWG）比其他所有饲料处理组都多。第 42 天淋巴细胞、第 28 天和第 42 天嗜中性粒细胞以及第 14 天和第 28 天嗜中性粒细胞/淋巴细胞（H/L）比值均受 VD+SREO 的影响。与 VD+SREO 组相比，VD 和/或 SREO 降低了第 28 天和第 42 天的甘油三酯、胆固醇和低密度脂蛋白浓度，尤其是 VD+SREO 处理。VD+SREO 还使所有处理组的血清免疫球蛋白 M、溶菌酶和吞噬百分率升高。
考虑到结果，建议在适当浓度的 VD 和植物 EO 组合对肉鸡免疫系统和性能指标有良好的影响。
