Siti Rahmatillah Ririn, Ramdani Diky, Hernaman Iman, Jayanegara Anuraga, Hidayatik Nanik
Department of Animal Production, Faculty of Animal Husbandry, Universitas Padjadjaran, Sumedang, West Java, 45363, Indonesia.
Department of Animal Nutrition and Feed Technology, Faculty of Animal Husbandry, Universitas Padjadjaran, Jatinangor Campus, Sumedang 45363, Indonesia.
Vet World. 2024 Oct;17(10):2204-2210. doi: 10.14202/vetworld.2024.2204-2210. Epub 2024 Oct 4.
Phenolic tannins, which are ubiquitous in plants, exhibit diverse biological activities and have drawn significant attention for their potential impact on ruminant nutrition and health. Although phenolic tannins have beneficial and detrimental effects on rumen fermentation, their precise influence remains poorly understood. This study aimed to explore the effects of varying doses of green tea extract (GTE) on rumen fermentation parameters through an trial using sheep rumen liquids.
A 4 × 2 factorial design was used to test the effect of 4 different doses of GTE treatment (0, 140, 280, and 560 mg/kg) in 2 different runs on degradability, fermentation profiles, and gas production using the Hohenheim Gas Test method.
Across running times, the GTE-treated diet did not affect (p > 0.05) dry matter degradability % and organic matter degradability %, pH, ammonia (NH-N, mg/dL), 24 h total gas production (tGP 24h, mL), and acetate-to-propionate ratio (A: P), but it reduced (p < 0.05) tGP 6 h compared with GTE-0 (control diet without GTE). GTE treatment tended to reduce (p < 0.1) methane (CH, % LEL) and total volatile Fatty Acids (tVFA, mM). Across GTE treatment, the 1 run had higher (p < 0.001) tGP 6-24 h and pH, but lower (p < 0.001) tVFA and A: P in comparison with the 2 run.
GTE treatment tends to decrease CH output in rumen without affecting degradability, tGP, and most fermentation profiles, except for a tendency to reduce tVFA.
酚类单宁广泛存在于植物中，具有多种生物活性，因其对反刍动物营养与健康的潜在影响而备受关注。尽管酚类单宁对瘤胃发酵有有益和有害影响，但其确切影响仍知之甚少。本研究旨在通过使用绵羊瘤胃液的试验，探索不同剂量的绿茶提取物（GTE）对瘤胃发酵参数的影响。
采用4×2析因设计，使用霍恩海姆气体测试法，测试2种不同批次运行中4种不同剂量的GTE处理（0、140、280和560mg/kg）对降解率、发酵特征和产气量的影响。
在不同运行时间内，GTE处理的日粮对干物质降解率（%）、有机物降解率（%）、pH值、氨（NH-N，mg/dL）、24小时总产气量（tGP 24h，mL）和乙酸与丙酸比例（A:P）无影响（p>0.05），但与GTE-0（不含GTE的对照日粮）相比，6小时的tGP降低（p<0.05）。GTE处理倾向于降低（p<0.1）甲烷（CH，%LEL）和总挥发性脂肪酸（tVFA，mM）。在不同GTE处理中，与第2批次运行相比，第1批次运行的6-24小时tGP和pH值较高（p<0.001），但tVFA和A:P较低（p<0.001）。
GTE处理倾向于降低瘤胃中CH的产量，而不影响降解率、tGP和大多数发酵特征，但有降低tVFA的趋势。
