| In situ evaluation of the ruminal and intestinal degradability of extruded whole lupin seed nitrogen. | |
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MedLine Citation:
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PMID: 1768316 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effect of whole lupin seeds (Lupinus albus cv Lublanc) at 120, 150 and 195 degrees C on in situ nitrogen degradability (Dg.N) was measured by the nylon bag technique using fistulated non-lactating Holstein cows. The N degradation was evaluated in nylon bags suspended in the rumen; heating the seeds at 120, 150 and 195 degrees C decreased the Dg.N value: 83.9, 72.9 and 53.0 respectively vs 95.3% (rumen outflow rate of 0.06/h). To estimate the total N disappearing in the digestive tract, bags were incubated in the rumen for 16 h, then in a pepsin bath for 2 h and then introduced into the duodenum for subsequently recovery in feces. The whole tract degradability of N was always high, approximately 98.3%. The amounts of N which disappeared in the intestine increased from 3.1 (untreated seeds) to 15.1, 26.3 and 44.7% as the temperature rose to 120, 150 and 195 degrees C respectively. The PDIN and PDIE contents (g/kg of DM) of the raw whole lupin seeds were 224 and 84 respectively; extrusion elevated these values by 10-32% for PDIN and 57-194% for PDIE. The augmentation in the supply of dietary proteins to the postruminal parts as a result of extrusion could rapidly benefit high yielding cows. |
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Authors:
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P Cros; C Benchaar; C Bayourthe; M Vernay; R Moncoulon |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Reproduction, nutrition, development Volume: 31 ISSN: 0926-5287 ISO Abbreviation: Reprod. Nutr. Dev. Publication Date: 1991 |
Date Detail:
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Created Date: 1992-02-27 Completed Date: 1992-02-27 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8913069 Medline TA: Reprod Nutr Dev Country: FRANCE |
Other Details:
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Languages: eng Pagination: 575-83 Citation Subset: IM |
Affiliation:
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ENSAT, Laboratoire de Zootechnie et des Productions Animales, Toulouse, France. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed Animals Cattle / physiology* Dietary Proteins / metabolism* Digestion Fabaceae Female Hot Temperature Intestines / physiology* Nitrogen / metabolism* Plants, Medicinal Rumen / physiology* Seeds Solubility |
| Chemical | |
Reg. No./Substance:
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0/Dietary Proteins; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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