Trace Mineral Source Impacts Volatile Fatty Acid Profile and Rumen Trace Mineral Solubility in Feedlot Steers.

IF 2.7 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animals Pub Date : 2025-04-30 DOI:10.3390/ani15091271

Huey Yi Loh, Octavio Guimaraes, Meghan P Thorndyke, Sam Jalali, Jerry W Spears, Jeff S Heldt, Terry E Engle

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Abstract

Two experiments were conducted to evaluate the effects of trace mineral (TM) source on: (1) nutrient digestibility and rumen fermentation characteristics, (2) rumen TM solubility, and (3) TM binding strength on ruminal digesta. In experiment 1, twelve cannulated Angus steers were adapted to a high-concentrate diet, blocked by body weight, and randomly assigned to dietary treatments consisting of 18, 40, or 90 mg of supplemental Cu, Mn, and Zn/kg DM, respectively, from either sulfate (STM) or hydroxy (HTM) sources. Following diet adaptation, total fecal and rumen fluid were collected over a 5 d period. Nutrient digestibility was not affected (p > 0.15) by TM source. Steers supplemented with HTM had greater (p < 0.05) ruminal molar proportions of propionate and lower (p < 0.05) molar proportions of butyrate compared to STM-supplemented steers. In experiment 2, steers received a single pulse dose of their respective TM treatments via the cannula. Ruminal samples were obtained at 2 h intervals from -4 to 24 h post-dosing. Ruminal-soluble Cu concentrations were greater (p < 0.05) for STM-dosed steers. Steers receiving HTM had greater (p < 0.01) Cu and Zn and lower (p < 0.01) Mn released from digesta compared to those receiving STM.

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微量矿物质来源对饲用肉牛挥发性脂肪酸分布和瘤胃微量矿物质溶解度的影响

本试验旨在研究微量矿物质（TM）源对瘤胃营养物质消化率和瘤胃发酵特性的影响；(2)瘤胃TM溶解度；(3)TM结合强度对瘤胃食糜的影响。试验1选用12头空心安格斯阉牛，采用高精料饲粮，按体重进行饲喂，随机分配至饲粮中分别添加18、40、90 mg /kg DM的硫酸盐（STM）或羟基（HTM）铜、锰和锌。饲料适应后，在5 d内收集总粪便和瘤胃液。营养物质消化率不受TM源影响（p > 0.15）。与stm相比，HTM组瘤胃丙酸摩尔比（p < 0.05）更高，丁酸摩尔比（p < 0.05）更低。在实验2中，受试者通过套管接受单脉冲剂量的TM治疗。在给药后-4 ~ 24 h每隔2 h采集一次瘤胃样品。stm组瘤胃可溶性铜浓度显著高于对照组（p < 0.05）。与STM组相比，HTM组食糜中Cu和Zn的释放量显著增加（p < 0.01）， Mn的释放量显著降低（p < 0.01）。

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来源期刊

Animals Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

4.90

自引率

16.70%

发文量

3015

审稿时长

20.52 days

期刊介绍： Animals (ISSN 2076-2615) is an international and interdisciplinary scholarly open access journal. It publishes original research articles, reviews, communications, and short notes that are relevant to any field of study that involves animals, including zoology, ethnozoology, animal science, animal ethics and animal welfare. However, preference will be given to those articles that provide an understanding of animals within a larger context (i.e., the animals'' interactions with the outside world, including humans). There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental details and/or method of study, must be provided for research articles. Articles submitted that involve subjecting animals to unnecessary pain or suffering will not be accepted, and all articles must be submitted with the necessary ethical approval (please refer to the Ethical Guidelines for more information).