奶牛奶酪乳清饲喂羔羊的摄食行为、瘤胃和血液动力学

Q4 Agricultural and Biological Sciences
L. F. Guedes, Tatiana Santos Primo, Â. M. Vasconcelos, R. Pompeu, J. N. M. Neiva, C. Costa, D. Oliveira, M. Rogério
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引用次数: 1

摘要

摘要本研究旨在评价奶牛奶酪乳清(CCW)在羔羊日粮中添加对羔羊摄食行为、瘤胃和血液参数的影响。试验选用25 kg体重的杂交未阉割公羔羊20只,采用完全随机设计,分为4个处理:对照饲粮(由玉米、豆粕和天然牧草青贮组成)和试验饲粮(对照饲粮+在DM中分别添加1.6、2.7和4.0%的CCW)。均数比较采用Tukey检验,变量间的关联强度采用Pearson相关检验。对收集的瘤胃液和血液数据进行回归分析。每隔24小时进行一次行为评估,每5分钟进行一次测量。饲粮中添加CCW不影响瘤胃pH值,但促进了反刍和采食时间的减少,也减少了反刍次数和反刍咀嚼次数。饲粮中氨氮和总蛋白浓度以添加4%总重的羔羊最低。然而,这些值在微生物生长的推荐范围内。CCW是羔羊饲料中潜在的蛋白质替代品,因为它不会干扰营养摄入、瘤胃和血液参数,并且有利于正氮平衡。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ingestive behavior, ruminal and blood kinetics in lambs fed cow cheese whey
ABSTRACT The objective of this study was to evaluate the inclusion of cow cheese whey (CCW) in the diet for lambs on the ingestive behavior, ruminal and blood parameters. Twenty crossbred, male, non-castrated lambs with 25 kg body weight were assigned to four treatments: control diet (composed of corn, soybean meal and native pasture silage) and test diets (control diet + inclusion of CCW in increasing levels of 1.6, 2.7 and 4.0% in DM), in a completely randomized design with four treatments and five replications. Means were compared by Tukey’s test, and the strength of association between variables was tested by Pearson’s correlation. Regression analysis was also performed for data from the collection of ruminal fluid and blood. Behavioral assessments were made at a 24-hour interval in measurements taken every five minutes. The inclusion of CCW in the diet did not impair ruminal pH, but promoted a decrease in rumination and feeding times, also causing a lower number of cuds and a lower number of cud chews. The lowest concentration of ammonia nitrogen and total protein were found in lambs receiving the diet with 4% CCW. However, these values were within the range recommended for microbial growth. CCW is a potential protein alternative in lambs feed as it does not interfere with nutrient intake, ruminal and blood parameters, and favors a positive nitrogen balance.
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来源期刊
Revista Brasileira de Saude e Producao Animal
Revista Brasileira de Saude e Producao Animal Agricultural and Biological Sciences-Animal Science and Zoology
CiteScore
0.70
自引率
0.00%
发文量
16
审稿时长
21 weeks
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