EFFECTS OF TOWER AND 1821 RAPESEED MEALS AND TOWER GUMS ON MILK YIELD, MILK COMPOSITION AND BLOOD PARAMETERS OF LACTATING DAIRY COWS

Author:

PAPAS ANDREAS,INGALLS J. R.,CANSFIELD P.

Abstract

The effects of 1821 and Tower rapeseed meals (RSM) and Tower gums on feed intake, milk yield and composition, iodine and thiocyanate (SCN) content of milk and selected blood parameters were studied in two Lucas switch-back trials with lactating Holstein cows. Experimental treatments consisted of the sources of supplemental protein in the grain mixtures. In the first trial, Tower RSM at 26% and 1821 at 20 and 30% were compared to soybean meal (SBM) in grain mixtures balanced for protein and fiber content. Milk yield of cows receiving 30% 1821 RSM was greater than that of the control group (P < 0.05). There were no other treatment effects on feed intake, milk yield, fat, protein and solids not fat content of milk or plasma thyroxine levels (P > 0.05). Both Tower and 1821 RSM increased SCN and reduced iodine content of milk (P < 0.05). In the second trial, Tower RSM containing 0, 4 and 8% Tower rapeseed gums were compared to the SBM control. There were no treatment effects on feed intake, milk yield and composition (P > 0.05). Rapeseed meal decreased milk iodine content, increased milk SCN content (P < 0.01), and red blood cell concentration but decreased white blood cell concentration (P < 0.10). No effect on hemoglobin and packed cell volume was observed. There were no effects of level of gums on any of the above parameters.

Publisher

Canadian Science Publishing

Subject

Animal Science and Zoology,Food Animals

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