Effects of dietary stevia extract supplementation on growth performance, serum biochemical indices, and intestinal health of yellow-feathered broilers

文献类型： 外文期刊

第一作者： Liu, Xiubin

作者： Liu, Xiubin;Jing, Yidan;Li, Zhen;Zeng, Jianguo;Wang, Xin;Lin, Qian;Song, Yunfei;Zeng, Jianguo

作者机构：

关键词： antioxidant indices; growth performance; intestinal health; stevia extract; serum biochemical indices

期刊名称：JOURNAL OF ANIMAL SCIENCE （ 影响因子：2.9； 五年影响因子：3.3 ）

ISSN： 0021-8812

年卷期： 2024 年 102 卷

页码：

收录情况： SCI

摘要： Stevia, a perennial shrub from the genus Stevia in the Asteraceae family, contains active ingredients like chlorogenic acid and shows promise as a natural feed additive. Despite this potential, there is limited research on the impact of stevia extract specifically on yellow-feather broilers. The study aimed to evaluate the effects of dietary stevia extract with varying concentrations of chlorogenic acid on the growth performance, serum biochemical indices, and intestinal health of yellow-feathered broilers. A total of 425 1-d-old female yellow-feathered broilers were randomly allocated into five treatment groups with five replicates of 17 broilers each, and the feeding trial lasted 63 d. The groups included control and those supplemented with stevia extract at concentrations of 100, 200, 300, and 400 mg/kg. Results showed that adding 100 mg/kg of stevia extract to the basal diet significantly increased the daily weight gain (ADG) of the broilers while reducing the average daily feed intake and feed conversion ratio (F/G). However, supplementation with stevia extract at concentrations up to 300 mg/kg led to decreased final weight and ADG. Conversely, dietary supplementation with 100-200 mg/kg of stevia extract improved serum antioxidant capacity and reduced serum total cholesterol levels compared to the control group. Additionally, the cecum n-butyric acid level was significantly higher in the 200 mg/kg stevia extract group than in the control group. In conclusion, supplementing yellow-feathered broilers' diets with stevia extract can enhance growth performance, antioxidant and immune capacity, and intestinal health. The optimal concentration of stevia extract for these benefits is between 100 and 200 mg/kg. Supplementation of 100-200 mg/kg of stevia extract in the diet of yellow-feather broilers has been shown to enhance growth performance, antioxidant and immune capabilities, and intestinal health of the birds. Stevia rebaudiana Bertoni, a perennial shrub belonging to the genus Stevia in the Asteraceae family, is renowned for its high-intensity sweetness due to its stevioside content (6%-12%). Notably, stevia extract also contains chlorogenic acid, isochlorogenic acid, terpenoids, steroids, flavonoids, and other active compounds. Research has demonstrated the potent antioxidant properties of stevia extract, making it a viable option for enhancing animal feed, particularly in pig and sheep diets, resulting in improved economic benefits and meat quality. Despite these findings, limited information exists regarding the impact of stevia leaf extract on yellow-feathered broilers. This study reveals that incorporating stevia leaf extract into the diet of yellow-feathered broilers can enhance their quality without any adverse effects, offering valuable insights for utilizing stevia extract as a natural feed additive.

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