Annual Review of Ruminant Nutrition in 2010 I.Lipid Nutrition
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Lipid in diet is one of the main sources of ruminant,it is closely related to ruminant production performance,and also associated with quality and fatty acid composition of ruminant products.Recent researches have focused on measurement practices in lipids digestion and metabolism to improve efficiency and quality of ruminant products.In this review,The author had reviewed the advance in ruminant lipids nutrition in 2010.The current research progress is consist of regulation of fatty acid metabolism in rumen,the efficiency of postruminal infusion of fatty acid metabolism and requirment content,the effect of fat(fatty acids) supplement diet on ruminant production and reproduction performance and fatty acid composition of ruminant products,as well as effect of rumen protected fat on production in ruminants.Keywords:
Digestion
Monogastric
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Ruminant products is one of the main sources of human diet,the fatty acid composition in it is closely related to human health.Research efforts have focused on nutritional management practices in lipids digestion and metabolism to improve production efficiency and the quality of the ruminant products.In the past two years,considerable progress has been made in increasing the understanding of lipid digestion and metabolism in ruminant.In this paper we have referred 126 articles related to ruminant lipid nutrition via PubMed,CNKI and the ADSA-ASAS annual joint meeting abstracts(2007 to 2008 editions)to make a review of the research progress of ruminant lipids nutrition in 2007 to 2008.The research program consist of kinetics of fatty acid metabolism in digestion tract,regulation of fatty acids metabolism in mammary gland,the effect of fat(fatty acids)supplement diet on ruminant production and fatty acid composition in fat.Effect of rumen rennet fat on production in ruminants and the cooperation effects of fat with other diet additives.
Digestion
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Scientific evidence and nutritional guidelines recommend a reduction in total fat intake, particularly of saturated fatty acids, which are associated with an increased risk of obesity, hypercholesterolemia, and cancer. Nutritionists recommend a higher intake of polyunsaturated fatty acids (PUFA), especially n-3 PUFA at the expense of n-6 PUFA. Besides the beneficial effects of n-3 fatty acids on human health, the conjugated linoleic acid (CLA) isomers have attracted increased attention as a result of their health promoting biological properties. As milk and meat are the main sources of CLA for human consumption, increasing such important nutrient in animal products is strongly recommended. Fat supplementation is one of the methods of increasing PUFA content in ruminant products, and it has been shown that PUFA can be increased in milk by supplementation with vegetable oils and oil seeds. Vegetable oils as equivalent to oilseeds show similar effects on CLA content in ruminant products.
Human nutrition
Calorie
Health Benefits
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRuminant Nutrition, Review of Utilization of Nonprotein Nitrogen in the RuminantW. D. GallupCite this: J. Agric. Food Chem. 1956, 4, 7, 625–627Publication Date (Print):July 1, 1956Publication History Published online1 May 2002Published inissue 1 July 1956https://pubs.acs.org/doi/10.1021/jf60065a005https://doi.org/10.1021/jf60065a005research-articleACS PublicationsRequest reuse permissionsArticle Views85Altmetric-Citations2LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
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Research works in ruminant nutrition have been widely published, especially those related to the energy and protein utilization. The energy and protein requirements for maintenance and production in tropical regions may be different from those in the subtropical areas. Responses of different species of ruminants to energy and protein supplements were also observed. The synchronization of energy and protein availability has been considered as an important strategy in affecting the microbial fermentative process in the rumen and in affecting the animal performance. The inclusion of long-chained unsaturated fatty acids in the diets has been successfully affecting milk production with higher concentration of unsaturated fatty acids. Feedstuffs characteristics in terms of their degradability and fermentation by rumen microbial enzymes have been intensively studied; however, further experimentations are still needed to elucidate the specific fate of its nutritive components in the rumen and tissue levels. Key words: Ruminants, energy, protein, nutrition
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Carbohydrate in diet plays an important role in regulation of rumen fermentation in ruminant,elevation of the feed efficiency and further for improving ruminant production performance.In this article,advance in ruminant carbohydrate nutrition in 2010 were focused on.The regulation of metabolism in rumen,the efficiency of postruminal infusion of starch and glucose metabolism and requirment content,and application of carbohydrate feed supplement diet on ruminant production and reproduction performance and composition of ruminant products.
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Nicotinic acid is one of the most important nutritional components for animal organism. This paper introduced the physicochemical properties,absorption and metabolism,source,the factors influencing the synthesis of nicotinic acid. It reviewed the effect of nicotinic acid in ruminant nutrition,rumen microbiology population,keto. sis prevention,anti-heat stress.
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