期刊文献

The Effect of Yeast and Roughage Concentrate Ratio on Ruminal pH and Protozoal Population in Thai Native Beef Cattle 收藏

酵母和粗浓缩比对泰国天然肉牛瘤胃pH与原生动物群的影响
原文求助 发布源
作者
Kampanat Phesatcha;Burarat Phesatcha;Metha Wanapat;Anusorn Cherdthong
作者单位
[1] Department of Animal Science, Faculty of Agriculture and Technology, Nakhon Phanom University, Nakhon Phanom 48000, Thailand [2] Department of Agricultural Technology and Environment, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand [3] Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand [*] Authors to whom correspondence should be addressed. Academic Editor: Brian J. Leury Animals 2022, 12(1), 53; https://doi.org/10.3390/ani12010053
关键词
beef cattle; yeast addition; rumen fermentation; feed digestibility
关键词译文
肉用牛;酵母加成;瘤胃发酵;饲料消化率
发布日期
2021-12-28
页码
53
DOI
10.3390/ani12010053
来源信息
Animals ISSN：2076-2615, 2022年, 12卷, 1期, 53页
摘要
The objective of this research is to investigate the effect of yeast (Saccharomyces cerevisiae) adding and roughage-to-concentrate ratio (R:C ratio) on nutrients utilization, rumen fermentation efficiency, microbial protein synthesis, and protozoal population in Thai native beef cattle. Four Thai native beef cattle, weighing an average of 120 ± 10 kg live weight, were randomly assigned to four dietary treatments using a 2 × 2 factorial arrangement in a 4 × 4 Latin square design. Factor A was the level of roughage-to-concentrate ratio (R:C ratio) at 60:40 and 40:60; factor B was the levels of live yeast (LY) supplementation at 0 and 4 g/hd/d; urea–calcium-hydroxide-treated rice straw were used as a roughage source. Findings revealed that total intake and digestibility of dry matter (DM), organic matter (OM), and crude protein (CP) were increased (p < 0.05) by both factors, being greater for steers fed a R:C ratio of 40:60 supplemented with 4 g LY/hd/d. Ruminal ammonia nitrogen, total volatile fatty acid (VFA), and propionate (C3) were increased (p < 0.05) at the R:C ratio of 40:60 with LY supplementation at 4 g/hd/d, whereas rumen acetate (C2) and the C2 to C3 ratio were decreased (p < 0.05). With a high level of concentrate, LY addition increased total bacterial direct counts and fungal zoospores (p < 0.05), but decreased protozoal populations (p < 0.05). High-concentrate diet and LY supplementation increased nitrogen absorption and the efficiency of microbial nitrogen protein production. In conclusion, feeding beef cattle with 4 g/hd/d LY at a R:C ratio of 40:60 increased C3 and nutritional digestibility while lowering protozoal population.
摘要译文
本研究的目的是探讨酵母（酿酒酵母）添加和粗致浓缩比（R：C比率）对泰国天然肉牛的营养利用，瘤胃发酵效率，微生物蛋白质合成和原生动物种群的影响。四个泰国本土牛粪，平均重量为120±10公斤的活力，随机分配到四个膳食处理，使用4×4拉丁方形设计中的2×2因子排列。因子A是60:40和40:60的粗致浓缩比（R：C比率）的水平;因子B是0和4g / hd / d的活酵母（ly）补充的水平;尿素 - 氢氧化钙处理的稻草用作粗源。结果表明，两种因素增加了干物质（DM），有机物（OM），有机物（OM）和粗蛋白（CP）的总摄入和消化率（P <0.05），喂养R：C比例为40的R：C比率更大： 60辅以4 G LY / HD / D。瘤胃氨氮，总挥发性脂肪酸（VFA）和丙酸盐（C3）在R：C比率为40:60，含量为4g / hd / d，而甲酸瘤（C2 ）和C2至C3比率降低（P <0.05）。具有高浓度的浓缩物，加入总细菌直接计数和真菌动物孢子（P <0.05），但原生动物种群减少（P <0.05）。高浓缩饮食和补充补充提高了氮吸收和微生物氮蛋白质产生的效率。总之，用4g / hd / d ly喂养牛肉牛，r：c比率为40:60增加C3和营养消化率，同时降低原生动物群。
Kampanat Phesatcha;Burarat Phesatcha;Metha Wanapat;Anusorn Cherdthong. The Effect of Yeast and Roughage Concentrate Ratio on Ruminal pH and Protozoal Population in Thai Native Beef Cattle[J]. Animals, 2022,12(1): 53