Evaluation of the Captec chrome controlled-release device for the estimation of fecal output by grazing sheep
Article Abstract:
The reliability of estimating grazing sheep fecal output (FO) using Captec chromic oxide controlled-release capsules was evaluated. Fourteen crossbred whethers were dosed with chromic oxide capsules, and total fecal collections and grab samples were taken from the same animals for 18 days as they grazed four paddocks of alfalfa. The results showed a limited relationship between the actual and predicted fecal output. This was attributed to variable capsule release rates of chromic oxide. It is suggested that controlled-release chromic oxide capsules be used with caution in studies of fecal output.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Influence of model and marker on digesta kinetic estimates for sheep
Article Abstract:
Digesta kinetic estimates were evaluated by marking feeds with rare earth markers and comparing the results with chromium-mordanted feeds (Cr). Results show that actual rate estimates for chromium and rare earth metals are not compatible. However, relative diet comparisons are similar which suggest that rare earth markers can be utilized in the simultaneous determination of digesta kinetic estimates for ingredients in mixed diets but are not applicable for comparison with Cr-mordant passage rates.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Diet characteristics, digesta kinetics, and dry matter intake of steers grazing eastern gamagrass
Article Abstract:
Eastern gamagrass was compared with flaccid grass and bermuda grass in terms of diet quality, ingestive mastication, and average daily gain in a randomized complete block with two pasture replicates. The high leaf proportion and heavy stem base of eastern gamagrass produced the greatest proportion of large particles which favored thehigh daily animal weight gain. Digesta kinetics did not differ among species.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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