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首页> 外文期刊>Journal of dairy research >The effect of cereal type and oc-tocopherol supplementation on selective quality and processability parameters of milk from late lactation grazing dairy cows
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The effect of cereal type and oc-tocopherol supplementation on selective quality and processability parameters of milk from late lactation grazing dairy cows

机译：谷物型和oc-Tocophherol补充对晚期哺乳奶牛的牛奶选择性质量和可加工性参数的影响

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摘要

This research communication addressed the hypothesis that late lactation cows offered an oat-grain-based supplement or a high level of α-TOC supplementation at pasture would have improved milk composition and processability. Over a grazing period of 49 d, 48 Holstein Friesian dairy cows were randomly assigned to one of four dietary treatments. The dietary treatments were: control, pasture only (CTRL), pasture + 2.65 kg DM barley-based con-centrate + 350 IU α-TOC/kg (BARLO), pasture + 2.65 kg DM oat-based concentrate + 350 IU α-TOC/kg (OATLO) and pasture + 2.65 kg DM oat-based concentrate + 1050 IU α-TOC/kg (OATHI). Within this randomised complete block design experiment cows were blocked on days in milk (DIM) and balanced for parity, milk yield and composition. Rennet coagulation time (RCT) was reduced in milk from cows offered OATHI compared to CTRL cows and OATLO. Concentration of conjugated linoleic acid (CLA) was increased by OATHI compared to OATLO and in OATLO compared to CTRL. Supplementation with OATHI reduced individ-ual saturated fatty acids (SFAs) in milk compared to OATLO. In conclusion, supplementing grazing dairy cows with an oat-based supplement improved total milk CLA concentration com-pared to pasture only. Offering a high level of α-TOC (2931 IU/d) to dairy cows reduced RCT, individual SFA and increased total CLA concentration of milk compared to a lower a-TOC level (738 IU α-TOC/d).
机译：该研究通信解决了晚期哺乳奶牛提供燕麦谷物的补充剂或牧场的高水平α-TOC补充剂的假设将具有改善的牛奶成分和加工性。在49 D的放牧期间，48个Holstein Friesian奶牛随机分配到四种膳食治疗中的一种。饮食治疗是：对照，仅牧场（CTRL），牧场+ 2.65公斤DM大麦的CON-Centrate + 350 IUα-TOC / kg（Barlo），牧场+ 2.65kg DM燕麦浓度+ 350 IUα- TOC / kg（燕麦）和牧场+ 2.65kg DM燕麦浓缩物+ 1050 iuα-toc / kg（oathi）。在这种随机的完整块设计中，设计实验奶牛在牛奶（DIM）的日子里被封锁，并且平衡平衡，牛奶产量和组成。与Ctrl奶牛和燕麦咖啡相比，来自牛的牛奶中的牛奶中的牛奶减少了肾素凝固时间（RCT）。与核苷酸和亚甲酸合并与Ctrl相比，通过oathi增加缀合的亚油酸（CLA）的浓度。与Oatlo相比，用oathi降低了牛奶中的单个饱和脂肪酸（SFA）。总之，用燕麦的补充剂补充吃草乳制品奶牛改善了牛奶CLA浓度的总牛奶浓度。与较低A-TOC水平相比

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  • 来源
    《Journal of dairy research》 |2021年第1期|29-32|共4页
  • 作者

    Zoe C. McKay; Michael OSullivan; Mary B. Lynch; Finbar J. Mulligan; Lu Ma; Gaurav Rajauria; Karina M. Pierce;

  • 作者单位

    School of Agriculture and Food Science University College Dublin Lyons Research Farm Lyons Estate Celbridge Naas Co. Kildare Ireland;

    School of Agriculture and Food Science University College Dublin Belfield Dublin 4 Ireland;

    School of Agriculture and Food Science University College Dublin Lyons Research Farm Lyons Estate Celbridge Naas Co. Kildare Ireland;

    School of Veterinary Medicine University College Dublin Belfield Dublin 4 Ireland;

    State Key Laboratory of Animal Nutrition Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing 100193 China;

    School of Agriculture and Food Science University College Dublin Lyons Research Farm Lyons Estate Celbridge Naas Co. Kildare Ireland;

    School of Agriculture and Food Science University College Dublin Lyons Research Farm Lyons Estate Celbridge Naas Co. Kildare Ireland;

  • 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

    Dairy cow; late lactation; milk processability; oat grain; α-tocopherol;

    机译：奶牛;晚期哺乳;牛奶加工性;燕麦谷物;α-生育酚;

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