检索结果-南通市图书馆

Intake,digestibility and nitrogen utilization in cattle fed tropical forage and supplemented with protein in the rumen,abomasum,or both

引用

Journal of Animal Science and Biotechnology 2016年第4期7卷 544-553页

作者： Luana marta de Almeida Rufino Edenio Detmann Daianyíris Gomes William Lima Santiago dos Reis Erick Darlisson Batista Sebastiao de Campos Valadares Filho mário fonseca paulino Department of Animal Science Universidade Federal de Viaosa Department of Animal Science Universidade Federal Rural da Amaznia

Background： There is little information in the tropics with regard the comparative understanding of how an increased nitrogen supply in the rumen or in the intestines affects efficiency of nitrogen utilization in cattle. This study evaluated the effects of supplementation with nitrogenous compounds in the rumen, abomasum, or both on intake, digestibility and the characteristics of nitrogen utilization in cattle fed tropical forage. Four rumen- and abomasum-fistulated Nellore bulls （227 ± 11 kg） were used. Four treatments were evaluated： control, ruminal supplementation （230 g/d of supplemental protein in the rumen）, abomasal supplementation （230 g/d of supplemental protein in the abomasum）, and ruminal and abomasal supplementation （115 g/d protein in both the rumen and the abomasum）. The basal forage diet consisted of Tifton 85 hay with a crude protein （CP） level of 78.4 g/kg dry matter. Casein was used as a supplement. The experiment was conducted using a 4 x 4 Latin square. Results： There were no differences between the treatments （P 〉 0.10） with regard to forage intake. The intake and tota digestibility of CP increased （P 〈 0.01） with supplementation. The nitrogen balance in the body increased （P 〈 0.01） and muscle protein mobilization decreased （P 〈 0.01） with supplementation, regardless of the supplementation site. The efficiency of nitrogen utilization did not differ among the treatments （P 〉 0.10）. Conclusions： The supplementation of cattle fed tropical forage with protein in the rumen, abomasum, or both similarly increased the nitrogen accretion in animal, which reflects improvements on nitrogen status in animal body.

关键词： Casein Nitrogen balance Rumen ammonia nitrogen Supplementation 3-methylhistidine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Energetic-protein supplementation in the last 60 days of gestation improves performance of beef cows grazing tropical pastures

引用

Journal of Animal Science and Biotechnology 2018年第1期9卷 208-216页

作者： Aline Gomes da Silva mário fonseca paulino Edenio Detmann Henrique Jorge Fernandes Lincoln da Silva Amorim Román Enrique maza Ortega Victor Valério de Carvalho Josilaine Aparecida da Costa Lima Felipe Henrique de moura mariana Benevides monteiro Jéssika Almeida Bitencourt Universidade Federal de Vicosa VicosaMinas Gerais 36570-000Brazil Universidade Federal de mato Grosso do Sul Campo GrandeMato Grosso do Sul 79074-460Brazil Universidade Estadual de mato Grosso do Sul AquidauanaMato Grosso do Sul 79200-000Brazil Biotran Biotecnologia e Treinamento em Reproducao Animal AlfenasMinas Gerais 37130-000Brazil Universidade Federal do Acre Rio BrancoAcre 69920-900Brazil

Background： Nutrition is one of the most important factors that affect animal performance, and it therefore also impacts on financial results in beef systems. In this way, finding the best strategy for feeding supplements is of paramount importance. Aiming to evaluate the effect of supplement feeding strategies for beef cows in the last third of gestation, two experiments were conducted. In Experiment 1, 35 pregnant Nellore cows were assigned to a completely randomized design with four treatments： control, which received no supplement; supplementation for the last 30 d of gestation（30-d; 3.0 kg/d）; supplementation for the last 60 d of gestation（60-d; 1.5 kg/d）; or supplementation for the last 90 d of gestation（90-d; 1.0 kg/d）. All supplemented treatments received the same total amount of supplement throughout the experiment： 90 kg（20% of crude protein）. A second experiment（Experiment 2） was delineated to evaluate the effects of the amounts offered in Experiment 1 on intake and metabolism. Four multiparous pregnant Nellore cows were assigned to a 4 × 4 Latin square design, with periods of15 d ***： There was a linear effect of the number of days of supplementation on calving body weight（BW; P 〈 0.05）and a quadratic effect on BW change from parturition to d 31 post-calving（P 〈 0.05）, with cows on the 60-d strategy losing less BW post-calving. No difference was found in offspring birth BW（P 〉 0.10）. A significant linear effect on interval from parturition to conception（P 〈 0.05） was observed, with the highest calving to conception interval being observed in the 90-d strategy. The level of supplementation did not affect forage intake or neutral detergent fiber digestibility（P 〉 0.10）. Nitrogen excreted through urine tended to increase linearly with the level of supplementation（P 〈 0.10）.Conclusion： Providing 1.5 kg of supplement during the last 60 d of gestation improves cow performance after calving, reducing the magnitude of BW lost, and reduces the number of

关键词： Flushing Nutrition Parturition Reproduction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：