Evaluation of praseodymium as a liquid marker in rumen turnover studies

The acetate complex of praseodymium chelated to EDTA (Pr-EDTA) was evaluated as a marker of the liquid phase turnover in the rumen. Five rumen fistulated Holstein Friesian cows in week 9 of lactation were fed four times a day a total mixed ration at two levels of intake: high (100% of voluntary inta...

Full description

Saved in:
Bibliographic Details
Published in:Animal feed science and technology 1996-12, Vol.63 (1), p.201-209
Main Authors: Bernal-Santos, G., van Soest, P.J., Sniffen, C.J., Thonney, M.L.
Format: Article
Language:English
Subjects:
CHELATEUR
CHELATING AGENTS
COBALT
COBALTO
COWS
Dairy cows
DEGRADACION
DEGRADATION
FEED INTAKE
INGESTION DE PIENSOS
LACTACION
LACTATION
Liquid marker
Praseodymium
PRISE ALIMENTAIRE (ANIMAUX)
QUELATOS
RUMEN
Ruminal turnover
VACA
VACHE
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The acetate complex of praseodymium chelated to EDTA (Pr-EDTA) was evaluated as a marker of the liquid phase turnover in the rumen. Five rumen fistulated Holstein Friesian cows in week 9 of lactation were fed four times a day a total mixed ration at two levels of intake: high (100% of voluntary intake) and low (80% of voluntary intake). Ruminal turnover time was estimated by a continuous dose of Pr-EDTA during 3 consecutive days followed by total rumen emptying, and calculated as the ratio of net rumen contents to intake in a 24 h period. A pulse dose of cobalt chelated to EDTA (Co-EDTA) was used to estimate liquid rumen turnover time calculated from the slope of its excretion curve, and was considered the control. Praseodymium turnover time was not affected by level of intake ( P > 0.05). Compared with Co-EDTA, turnover time values were different (10.8 h vs. 14.7 h, respectively; P < 0.05), which indicates that Pr underestimated liquid turnover time probably as a result of poor distribution within the rumen liquid phase.
ISSN:0377-8401
1873-2216
DOI:10.1016/S0377-8401(96)01010-3