Alfalfa Pasture Bloat Can Be Eliminated by Intermixing with Newly-Developed Sainfoin Population
Alfalfa Pasture Bloat Can Be Eliminated by Intermixing with Newly-Developed Sainfoin Population
复制标题
DOI：
10.2134/agronj13.0378
复制
发表时间：
2014-07
期刊：
影响因子：
2.1
通讯作者：
E. T. Sottie;S. Acharya;T. McAllister;James E. Thomas;Yanan Wang;A. Iwaasa
中科院分区：
文献类型：
--
作者：
E. T. Sottie;S. Acharya;T. McAllister;James E. Thomas;Yanan Wang;A. Iwaasa
发表在Agron J. 106：1470 - 1478（2014）doi：10.2134/agronj13.0378可通过作者支持的开放获取选项在网上免费获得。版权所有© 2014年由美国农学会，5585吉尔福德路，麦迪逊，威斯康星州53711。All rights reserved.未经出版商书面许可，不得以任何形式或通过任何电子或机械手段（包括影印、录音或任何信息存储和检索系统）复制或传播本期刊的任何部分。苜蓿（Medicago sativa L.）牧场的反刍动物，尽管高增长率是可以获得的。红豆草（Onobrychis viciifolia Scop.），一种浓缩的含单宁的豆类，已知可减少混合林中苜蓿牧草的膨胀。实验于2010年至2012年在Lethbridge，AB进行，使用两个红豆草/栽培品种AC Blue J苜蓿混合牧场，最初于2008年以50：50混合物播种，并由阉牛（Bos taurus）轮流放牧。新的红豆草种群品种LRC-3519专门选择多切割系统下的性能改善，坚持更好的（29%的总牧草干物质[DM]）相比，品种新星（5%）后，每年两个循环的轮牧。当安格斯牛在最大程度地发生腹胀的条件下放牧红豆草/苜蓿混合牧场时，与Nova混合物相比，LRC-3519混合林中牛的腹胀发生率和严重程度降低了98%（P <0.001）。在2011 - 2012年的一项单独的作物偏好研究中，将8头阉牛随机配对并分配到4个苜蓿和红豆草带状牧场，以确定DM利用率和放牧这两种牧草所花的时间。阉牛在苜蓿带上的时间比红豆草多（55%），采食苜蓿（2048 kg DM）比红豆草（1164 kg DM）多（P <0.05）。尽管更高的偏好苜蓿，高比例的新红豆草在混合苜蓿站大幅降低牛放牧混合苜蓿/红豆草牧场的膨胀的风险。
Published in Agron. J. 106:1470–1478 (2014) doi:10.2134/agronj13.0378 Available freely online through the author-supported open access option. Copyright © 2014 by the American Society of Agronomy, 5585 Guilford Road, Madison, WI 53711. All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. AbstRAct Pasture bloat is a major deterrent to the grazing of alfalfa (Medicago sativa L.) pastures by ruminants, despite the high growth rates that are obtainable. Sainfoin (Onobrychis viciifolia Scop.), a condensed tannin-containing legume, is known to reduce alfalfa pasture bloat in mixed stands. Experiments were conducted in 2010 to 2012 at Lethbridge, AB, using two sainfoin/cultivar AC Blue J alfalfa mixed pastures originally seeded as 50:50 mixes in 2008 and rotationally grazed by steers (Bos taurus). New sainfoin population cultivar LRC-3519 specifically selected for improved performance under a multi-cut system, persisted better (29% of total herbage dry matter [DM]) compared to cultivar Nova (5%) after two cycles of rotational grazing in each year. Bloat incidence and severity in steers were reduced (P < 0.001) by 98% in LRC-3519 mixed stands compared to Nova mixtures when Angus steers grazed sainfoin/alfalfa mixed pastures under conditions for maximizing bloat occurrence. In a separate crop preference study during 2011–2012, eight steers were randomly paired and assigned to four alfalfa and sainfoin strip pastures to determine DM utilization and time spent grazing the two forages. Steers spent more time (55%) in alfalfa strips compared to sainfoin and grazed more (P < 0.05) alfalfa (2048 kg DM) than sainfoin (1164 kg DM). In spite of higher preference for alfalfa, a high proportion of new sainfoin in mixed alfalfa stands reduced risk of bloat substantially in cattle grazing mixed alfalfa/sainfoin pasture.