Henan International Joint Laboratory of Animal Welfare and Health Breeding, Henan University of Science and Technology, Luoyang, P. R. China.
College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, P. R. China.
Anim Biotechnol. 2023 Jun;34(3):520-528. doi: 10.1080/10495398.2021.1979024. Epub 2021 Oct 22.
This study was conducted to evaluate the effects of dietary supplementation with polysaccharide (GCP) on growth performance, serum biochemistry, immunity, and egg laying in female quail. 300 1-day-old female quail were sorted into four dietary treatments with five replicate cages of 15 birds each. The basic diet in the four treatment groups was supplemented with 0, 500, 1000 and 1500 mg/kg GCP, and the experiment continued for 80 days. Results showed that dietary supplementation with GCP significantly ( < 0.05) increased average daily gain in a dose-dependent fashion, and decreased ( < 0.05) the feed-to-gain ratio and mortality. The relative weights of the thymus and bursa of Fabricius increased ( < 0.05) linearly with increasing dose of GCP from 0 to 1500 mg/kg on day 20. GCP birds showed higher serum levels of protein, glucose, immunoglobulin A and immunoglobulin M, but lower serum triglycerides ( < 0.05) on day 50. GCP increased ( < 0.05) average laying rate and average egg weight linearly from days 60 to 80, whereas feed to egg ratio was decreased ( < 0.05). Taken together, these results revealed that GCP could improve growth performance, serum biochemistry, immunity, and egg laying in female quail. Therefore, GCP may be a potential replacement for antibiotic growth promoters in poultry.
本研究旨在评估多糖（GCP）膳食补充对蛋鸡生长性能、血清生化指标、免疫和产蛋性能的影响。将 300 只 1 日龄雌性鹌鹑随机分为 4 个日粮处理组，每组 5 个重复笼，每个重复笼 15 只鹌鹑。在 4 个处理组的基础日粮中分别添加 0、500、1000 和 1500mg/kg 的 GCP，试验持续 80 天。结果表明，GCP 日粮添加量呈剂量依赖性显著（ < 0.05）提高了平均日增重，降低（ < 0.05）了料重比和死亡率。从第 20 天开始，随着 GCP 添加量从 0 增加到 1500mg/kg，胸腺和法氏囊的相对重量呈线性增加（ < 0.05）。GCP 组在第 50 天表现出更高的血清蛋白、葡萄糖、免疫球蛋白 A 和免疫球蛋白 M 水平，但更低的血清甘油三酯（ < 0.05）。从第 60 天到第 80 天，GCP 线性增加（ < 0.05）了平均产蛋率和平均蛋重，而料蛋比降低（ < 0.05）。综上所述，GCP 可改善蛋鸡的生长性能、血清生化指标、免疫和产蛋性能。因此，GCP 可能是家禽抗生素生长促进剂的潜在替代品。
