THE SEVERITY OF HYPOCUPREMIA IN SELECTD HERDS OF BEEF CATTLE IN NORTHWESTERN MANITOBA

Author:

BOILA R. J.,DEVLIN T. J.,DRYSDALE R. A.,LILLIE L. E.

Abstract

Hypocupremia, a condition whereby blood serum copper (Cu) is less than 9.4 μmoles/L was monitored in 40 selected herds of beef cattle from northwestern Manitoba. Data from 27 herds, blood sampled in the spring and autumn of 1974, were from a study to evaluate, as a supplemental source of Cu, a single dose of injectable Cu glycinate in the spring; an additional 13 non-experimental herds were blood sampled in the autumn of 1974. The severity of hypocupremia was determined by the change in concentration of Cu in blood serum of non-Cu-injected cattle between spring and autumn, and the effect of injectable Cu glycinate upon this change of concentration of Cu in blood serum. Within groups of herds, injectable Cu either increased (P < 0.05) mean serum Cu in treated cattle, beyond that of untreated cattle, or prevented (P < 0.05) a large drop of mean serum Cu level between spring and autumn. A modified (moved 5 to 10 km eastward) eastern boundary of the Ashville Geological Formation divided northwestern Manitoba into two subregions. In the eastern subregion, a moderate hypocupremia in selected herds was due primarily to an insufficiency of Cu in pasture forage, while the moderately to extremely severe hypocupremia in selected herds from the western subregion appeared to be due to a molybdenum (Mo) toxicity. A single dose of injectable Cu was an effective source of supplemental Cu in selected herds from the eastern subregion. The severity of Cu deficiency in herds of cattle from northwestern Manitoba was not related to calculated absorption coefficents for Cu and available Cu, based on the Cu, Mo and total sulfur content of pasture forages. Differences in the severity of hypocupremia were due to differences in the concentration of Mo in forages. Key words: Beef cattle, hypocupremia, copper deficiency, molybdenum toxicity, northwestern Manitoba

Publisher

Canadian Science Publishing

Subject

Animal Science and Zoology,Food Animals

Cited by 11 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Copper;Mineral Nutrition of Livestock;2022-05-30

2. Copper.;Mineral nutrition of livestock;2010

3. The Interactions Between Copper, Molybdenum, and Sulphur in Ruminant Nutrition;Annual Review of Nutrition;1991-07

4. EFFECTS OF MOLYBDENUM AND SULFUR ON MINERALS IN THE DIGESTIVE TRACT OF STEERS;Canadian Journal of Animal Science;1990-09-01

5. REVIEW OF COPPER DEFICIENCY AND METABOLISM IN RUMINANTS;Canadian Journal of Animal Science;1989-12-01

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3