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首页> 外文期刊>Journal of dairy science >Short communication: Effects of a physiologically relevant concentration of aflatoxin B1 with or without sequestering agents on in vitro rumen fermentation of a dairy cow diet
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Short communication: Effects of a physiologically relevant concentration of aflatoxin B1 with or without sequestering agents on in vitro rumen fermentation of a dairy cow diet

机译：短期通信：在体外瘤胃发酵的体外瘤胃发酵的生理学上相关浓度的性生理相关浓度的效果 - 在奶牛饮食中的体外瘤胃发酵的螯合剂

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摘要

animal feeds that can impair rumen fermentation athigh concentrations; however, its effects at physiologicallyrelevant concentrations are unknown. This studyexamined the effects of aflatoxin B_1 (AFB_1), with orwithout bentonite clay (CL) and Saccharomyces cerevisiaefermentation product (SCFP)–based sequesteringagents on in vitro rumen fermentation and digestibilityof a dairy cow TMR. Corn silage-based TMR (0.5 g,17.3% crude protein and 1.67 Mcal/kg of net energy forlactation) was incubated in a rumen fluid-buffer inoculum(1:2 ratio; 50 mL) with the following treatments:(1) no additives (control); (2) control + 0.75 μg/LAFB_1 (T); (3) T + 80 mg/L sodium bentonite clay(CL; Astra-Ben-20, Prince Agri Products Inc., Quincy,IL); or (4) CL + 14 mg/L SCFP (CL+SCFP; DiamondV, Cedar Rapids, IA). Ruminal fluid was collected 3 hafter the morning feeding from 3 cannulated cows fedthe same TMR, and rumen fluid from individual cowswas used to prepare separate inocula. Each treatmentwas incubated in duplicate at 39°C for 0, 4, 8, 16, and24 h in each of 3 runs. Adding T reduced total volatilefatty acid (VFA) concentration after 4 and 8 h andmolar proportion of propionate after 4 and 24 h of incubationrelative to control. Adding sequestering agents(CL and CL+SCFP) with T did not affect total VFAconcentration after 4 or 8 h, but increased total VFAafter 16 h and tended to increase molar proportion ofpropionate after 24 h compared with T. At 24 h, T hadlower DM digestibility and higher NH_3-N concentrationcompared with the control. Thus, AFB_1, even at verylow concentration (0.75 μg/L), had detrimental effectson rumen fermentation and subsequently DM digestibilityof the TMR. Adding sequestering agents did notprevent negative effects of T on rumen fermentationwithin 8 h of incubation; however, sequestering agentswere effective after 16 h of incubation.
机译：动物饲料可以损害瘤胃发酵高浓度;但是，它在生理学的影响相关浓度未知。这项研究检查了黄曲霉毒素B_1（AFB_1）的影响，有没有膨润土粘土（CL）和酿酒酵母酿酒酵母发酵产品（SCFP） - 基于封存体外瘤胃发酵和消化率的药剂奶牛TMR。基于玉米青贮饲养的TMR（0.5克，17.3％粗蛋白和1.67毫克/千克净能量哺乳期）在瘤胃 - 缓冲液接种物中温育（1：2比例; 50毫升）具有以下治疗方法：（1）没有添加剂（控制）; （2）控制+0.75μg/ L.afb_1（t）; （3）T + 80 mg / L钠膨润土粘土（CL; Astra-Ben-20，王子Agri Products Inc.，昆西，IL）; （4）Cl + 14 mg / L SCFP（CL + SCFP;钻石v，雪松急流，ia）。瘤胃液收集3小时早上从3个插管奶牛喂养后来自单个奶牛的同一个TMR和瘤胃液用来准备单独的接种物。每次治疗在39℃下重复孵育0,4,8,16和每次3次运行中的每一个都在24小时。添加T总量挥发性4和8小时后脂肪酸（VFA）浓度孵育4和24小时后丙酸盐的摩尔比例相对于控制。添加隔离剂（cl和cl + scfp）与t不影响总VFA4或8小时后浓度，但总VFA16小时后倾向于增加摩尔比例24小时后丙酸盐与T.在24小时后，T有降低DM消化率和更高的NH_3-N浓度与控制相比。因此，AFB_1，甚至在非常低浓度（0.75μg/ L），具有不利影响瘤胃发酵和随后DM消化率TMR。添加螯合剂没有防止T对瘤胃发酵的负面影响在孵化8小时内;但是，螯合剂孵化16小时后有效。

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  • 来源
    《Journal of dairy science》 |2020年第2期|1559-1565|共7页
  • 作者

    Y. Jiang; I. M. Ogunade; K. G. Arriola; A. A. Pech-Cervantes; D. H. Kim; X. Li; Y. L. Xue; D. Vyas; A. T. Adesogan;

  • 作者单位

    Department of Animal Sciences University of Florida Gainesville 32611;

    Department of Animal Sciences University of Florida Gainesville 32611 Division of Food and Animal Science Kentucky State University Frankfort 40601;

    Department of Animal Sciences University of Florida Gainesville 32611;

    Department of Animal Sciences University of Florida Gainesville 32611;

    Department of Animal Sciences University of Florida Gainesville 32611;

    Department of Animal Sciences University of Florida Gainesville 32611;

    Inner Mongolia Academy of Agricultural and Animal Husbandry Science Hohhot 010031 China;

    Department of Animal Sciences University of Florida Gainesville 32611;

    Department of Animal Sciences University of Florida Gainesville 32611;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    aflatoxin; sequestering agent; bentonite clay; rumen fermentation;

    机译：黄曲霉毒素;敏化剂;膨润土粘土;瘤胃发酵;

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