Effect of yeast peptide dietary supplementation on nutrient digestibility, growth performance, and blood metabolites in geese

Author: Hang He1*, Yancong Yuan2*, Fen Wang3, Bangquan Xiang1, Chuanshi Zhang1, Qinfeng Liao1, Yongzhi Lv1, Longjiao Li1, Yan Zhu4, Yaqiang Chen1, Yanhui Yang1, Anfang Liu2, Ke Zhang4, Danzhen Tashi1, Jiahao Yang1, Jie Zhang2#
Year: 2022
Issue: 5
Volume: 52
Page: 667 - 673

A study was conducted to evaluate the effect of yeast peptide supplementation on growth performance, nutrient digestibility, and blood metabolites in geese. One-day-old Sichuan white geese (n = 300, 95.16 ± 1.98 g) were randomly assigned to five dietary treatment groups containing either 0 (control), 100, 200, 300, or 400 mg/kg commercial yeast peptide product. Compared with the control, dietary supplemental yeast peptide at 200 mg/kg substantially improved feed conversion ratio, body slope length, half-eviscerated percentage, and the apparent digestibility of phosphorus. With the increase in dietary yeast peptide, breast width, carcass percentage, serum triglyceride and high-density lipoprotein increased linearly. The average daily gain, pelvis width, half-diving depth, low density lipoprotein, and digestibility of gross energy exhibited quadratic responses with the increase in dietary yeast peptide, with the 200 mg/kg or 300 mg/kg feeding level being the most effective. It can be concluded that dietary supplementation of yeast peptides improves growth performance and affects nutrient digestibility and blood metabolites, which were optimized at 200 mg/kg or 300 mg/kg of yeast peptide in the present study.

Keywords: blood parameter, digestion, geese, performance, yeast peptide
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