酵母培养有益于改善夏季山羊的瘤胃发酵和促进其生长性能

Shuang Zhang, Yuancong Geng, Yan Ling, Dan Wang, Guixue Hu
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摘要

本研究旨在探讨酵母培养物对夏季山羊抗氧化能力、瘤胃发酵和生长性能的影响。研究人员进行了一项体外试验,在基础日粮中分别添加干物质(DM)重量 0%(对照组)、0.6%(试验 1)、0.9%(试验 2)和 1.2%(试验 3)的酵母培养物。与对照组相比,经过 24 小时发酵,试验 2 和试验 3 组的 pH 值、总短链脂肪酸、乙酸、丙酸和丁酸浓度以及 DM、中性洗涤纤维和酸性洗涤纤维的降解性均显著提高(p < 0.05)。在饲喂试验中,36 只年龄为 3.0 ± 0.5 月龄、体重为 11.08 ± 1.41 千克的杂交山羊被分成三组,酵母培养物的添加量分别为基础日粮的 0%(对照组)、0.90%(试验 1)和 1.20%(试验 2)。与体外实验相比,试验 1 和试验 2 组对瘤胃发酵参数的影响相似。此外,与对照组相比,试验 1 和试验 2 组的干物质摄入量、平均日增重、血清总抗氧化能力、总超氧化物歧化酶和谷胱甘肽过氧化物酶的活性显著提高,丙二醛浓度显著降低(p < 0.05)。结果表明,酵母培养物(0.90%)可提高夏季山羊的抗氧化能力、瘤胃发酵和生长性能。最佳添加浓度为 0.90% DM。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Yeast Culture Is Beneficial for Improving the Rumen Fermentation and Promoting the Growth Performance of Goats in Summer
This study aimed to investigate the effects of yeast cultures on the antioxidant capacity, rumen fermentation, and growth performance of goats in the summer. An in vitro experiment was conducted using yeast culture supplemented at 0% (control), 0.6% (test 1), 0.9% (test 2), and 1.2% (test 3) of the dry matter (DM) weight of the basal diet. With a 24 h fermentation, the pH value; the total short-chain fatty acid, acetic acid, propionic acid, and butyric acid concentrations; and the degradability of the DM, the neutral detergent fiber, and the acid detergent fiber were significantly increased (p < 0.05) in tests 2 and 3 compared with the control group. In the feeding experiment, thirty-six crossbreed goats aged 3.0 ± 0.5 months with a body weight of 11.08 ± 1.41 kg were divided, and the yeast culture was supplemented at 0% (control), 0.90% (test 1), and 1.20% (test 2) of the basal diet. Similar effects on rumen fermentation parameters were obtained in test 1 and 2 groups compared to the in vitro experiment. Moreover, the dry matter intake, average daily gain, serum total antioxidant capacity, and the activities of total superoxide dismutase and glutathione peroxidase were significantly higher and the malondialdehyde concentration was significantly lower (p < 0.05) in tests 1 and 2 compared with the control. The results indicated that yeast culture (0.90%) could improve the antioxidant capacity, rumen fermentation, and growth performance of goats in summer. The optimal supplementation concentration is 0.90% DM.
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