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首页> 美国卫生研究院文献>Animal Nutrition >Growth performance nutrient digestibility antioxidant capacity blood biochemical biomarkers and cytokines expression in broiler chickens fed different phytogenic levels
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Growth performance nutrient digestibility antioxidant capacity blood biochemical biomarkers and cytokines expression in broiler chickens fed different phytogenic levels

机译：饲喂不同植酸水平的肉鸡的生长性能养分消化率抗氧化能力血液生化生物标志物和细胞因子表达

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The effects of inclusion levels of a phytogenic feed additive (PFA), characterized by menthol anethol and eugenol, on broiler growth performance, nutrient digestibility, biochemical biomarkers and total antioxidant capacity (TAC) of plasma and meat, as well as on the relative expression of selected cytokines, were studied in a 42-d experiment. A total of 225 one-day-old male Cobb broiler chickens were assigned into 3 treatments, with 5 replicates of 15 chickens each. Chickens were fed maize-soybean meal basal diets following a 3 phase (i.e., starter, grower and finisher) feeding program. Depending on PFA inclusion level, treatments were: no PFA (PFA-0), PFA at 100 mg/kg (PFA-100) and PFA at 150 mg/kg (PFA-150). Feed and water were available ad libitum. Feed conversion ratio (FCR) during finisher phase was improved quadratically (P < 0.05) with increasing PFA level. Overall, increasing PFA level increased body weight gain (BWG) in a linear (P < 0.05) and quadratic (P < 0.05) manner with treatments PFA-100 and PFA-150 being greater (P < 0.05) compared with PFA-0. Total tract apparent digestibility of dry matter increased linearly (P < 0.05) and quadratically (P < 0.05) with increasing PFA level. The apparent metabolizable energy corrected for nitrogen (AMEn) also increased linearly (P < 0.05). Increasing PFA level resulted in a linear (P < 0.05) increase in blood plasma TAC. Expression of pro-inflammatory cytokine interleukin -18 (IL-18) was reduced linearly (P < 0.05) in spleen with increasing PFA level. In conclusion, PFA inclusion at 100 mg/kg diet positively influenced performance, whereas PFA inclusion at 150 mg/kg resulted in a stronger improvement in AMEn and plasma TAC. Finally, PFA inclusion resulted in a pattern of reduced pro-inflammatory biomarker IL-18 at spleen. Overall, this study provides evidence for the beneficial role of PFA as a natural growth and health promoter in broiler chickens that needs to be further confirmed in field studies.
机译：以薄荷脑茴香脑和丁子香酚为特征的植物饲料添加剂（PFA）的含量对肉鸡生长性能，营养消化率，生化生物标志物和血浆和肉类总抗氧化能力（TAC）以及相对表达的影响在42天的实验中研究了所选细胞因子的组成。总共将225只1日龄大的Cobb雄性肉鸡分为3种处理，每5只重复15只鸡。在分三阶段（即开胃，生长和育肥）饲喂计划后，向鸡饲喂玉米-豆粕基础饲料。根据PFA的含量，治疗方法为：不使用PFA（PFA-0），100 mg / kg的PFA（PFA-100）和150 mg / kg的PFA（PFA-150）。饲料和水可随意获得。随着PFA水平的提高，精整阶段的饲料转化率（FCR）二次提高（P <0.05）。总体而言，增加PFA水平以线性（P <0.05）和二次方（P <0.05）的方式增加体重增加（BWG），与PFA-0相比，治疗PFA-100和PFA-150更大（P <0.05）。随着PFA水平的增加，干物质的总表观消化率呈线性增长（P <0.05）和呈二次增长（P <0.05）。经校正的氮的表观可代谢能量（AMEn）也线性增加（P <0.05）。 PFA水平升高导致血浆TAC线性增加（P <0.05）。随着PFA水平的升高，脾中促炎性细胞因子白介素-18（IL-18）的表达呈线性下降（P <0.05）。总之，以100 mg / kg的日粮添加PFA会对性能产生积极影响，而以150 mg / kg的日粮添加PFA则可以改善AMEn和血浆TAC。最后，包含PFA导致脾脏促炎性生物标志物IL-18减少的模式。总体而言，这项研究为PFA作为肉鸡自然生长和健康促进剂的有益作用提供了证据，这需要在现场研究中得到进一步证实。

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