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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Endogenous phosphorus loss in ruminants: A review  [2007]

Tayo, G.O.; Tan, Z.;

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Phosphorus (P), a major mineral in animal nutrition is currently a focus of the livestock industry. This is because of its high fecal excretion by livestock and the subsequent environmental pollution, especially in the eutrophication of lakes and surface water. Areas of intensive animal husbandry and dairy farms where P is fed in excess are particularly affected. Ruminants must be fed according to precise net requirement to reduce excessive loss in feces. The knowledge of fecal endogenous loss is necessary to precise maintenance P requirement. Variation exists in the endogenous fecal loss and P availability values in feedstuffs among different countries. Quantitative information on these indices is needed. Salivary P, dry matter intake and physical nature of diets are major determinants of endogenous P loss but the mechanisms surrounding their role are yet to be clearly defined. Uniform, precise and acceptable method of estimating endogenous P loss in ruminants is to be developed. A lot of studies have been carried out on P metabolism in recent times but some aspects of the metabolism in ruminants are poorly understood. This review attempts to discuss these problems in the light of past and recent findings on P loss with a view to exploring areas for further research.
From the journal
Journal of food, agriculture & environment
ISSN : 1459-0255

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
5
Issue:
3-4
Start Page:
267
End Page:
273
All titles:
"Endogenous phosphorus loss in ruminants: A review"@eng
Other:
"Includes references"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
5
Issue:
3-4
Start Page:
267
End Page:
273
All titles:
"Endogenous phosphorus loss in ruminants: A review"@eng
Other:
"Includes references"