Document Detail

In situ evaluation of the ruminal and intestinal degradability of extruded whole lupin seed nitrogen.
MedLine Citation:
PMID:  1768316     Owner:  NLM     Status:  MEDLINE    
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.
P Cros; C Benchaar; C Bayourthe; M Vernay; R Moncoulon
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Reproduction, nutrition, development     Volume:  31     ISSN:  0926-5287     ISO Abbreviation:  Reprod. Nutr. Dev.     Publication Date:  1991  
Date Detail:
Created Date:  1992-02-27     Completed Date:  1992-02-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8913069     Medline TA:  Reprod Nutr Dev     Country:  FRANCE    
Other Details:
Languages:  eng     Pagination:  575-83     Citation Subset:  IM    
ENSAT, Laboratoire de Zootechnie et des Productions Animales, Toulouse, France.
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MeSH Terms
Animal Feed
Cattle / physiology*
Dietary Proteins / metabolism*
Hot Temperature
Intestines / physiology*
Nitrogen / metabolism*
Plants, Medicinal
Rumen / physiology*
Reg. No./Substance:
0/Dietary Proteins; 7727-37-9/Nitrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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