Komoditas : KAMBING - Pustaka

Lambs fed high-tannin diets ate more PEG than controls (P = .03).
Lambs fed the 20% tannin diet ate the most PEG, and controls ate the
least PEG. Tannin limited intake of the diets, but PEG attenuated the
response to a great degree (P = .065). Immediately after tannin was
removed from the ration, lambs that formerly had been fed the 20%
tannin ration ate more PEG than lambs fed the other rations (P =
.0075). Ten of the lambs (5 from the 20% tannin group, 1 from the 15%
tannin, and 2 each from the 10 and 5% groups) continued to eat PEG
for 7 d after tannin was removed from their ration. When they were
tested again 6 wk after the trial and offered tannin-free diets,
their intake of PEG had decreased
Descriptors:feed intake. Animal Husbandry (Agriculture); Nutrition.
polyethylene glycol: self-regulated intake; tannin: dietary
Organism Descriptors:sheep (Bovidae): weanling
Supplemental Descriptors:Bovidae: Artiodactyla, Mammalia, Vertebrata,
Chordata, Animalia. Animals; Artiodactyls; Chordates; Mammals;
Nonhuman Mammals; Nonhuman Vertebrates; Vertebrates
Subject Codes:Animal Husbandry (Agriculture); Nutrition
ISSN:0021-8812
Year:2000
Journal Title:Journal of Animal Science
Copyright:Biological Abstracts Inc. (BIOSIS) All Rights Reserved
Title:The effect of physical form of orchardgrass hay on the passage
of particulate matter through the rumen of sheep
View Article: Journal of Animal Science. 78 (5). May, 2000. 1338-1354
CD Volume:318
Print Article: Pages: 1338-1354
Author(s):Bernard L Chaise J P Baumont R Poncet C
Author Affiliation:Unite de Recherche sur leb Herbivores, Institut
National de la Recherche Agronomique de Clermont-Ferrand, 63 122, St
Genes- Champanelle: lbernard@clermont.inra.fr
Language:English
Language of Summary:English (EN)
Abstract:Four Texel wethers (60 to 64 kg) fitted with ruminal and
duodenal cannulas were used to study the kinetics of particulate
matter in the rumen and the series of processes involved in their
selection and passage. They were fed, in eight equal meals, 1,200 g
of a mixture of a chopped orchardgrass hay and ground (8-mm screen)
and pelleted orchardgrass hay in 90/10, 50/50, 30/70, or 10/90
ratios, according to a 4 X 4 Latin square design. The particle size
distributions in feed, chewed feed, and ruminal, reticular, and
duodenal digesta were determined by a wet-sieving procedure.
Indigestible lignin was used as an internal marker to trace the
passage of particles through the rumen. Digesta flow measurement was
performed using the double-marker technique. We used a three- pool
model, which partitions particles through the large, medium, and
small particle pools, to determine the passage of lignin through
those pools. Particle pool sizes and rumen and pool mean retention
times (MRT) of lignin and of the rumen MRT of an ideal marker
introduced separately in each pool were corrected for the "filter
bed" effect. Grinding and pelleting of hay decreased the MRT of the
indigestible lignin pool in the rumen. Particle MRT decreased and
then reached a plateau with increased proportion of ground/pelleted
hay in the diet. The diet with a ratio of 50/50 of chopped and
ground/pelleted hay was the most favorable for the exist of particles
from the rumen because of both a higher outflow rate from the rumen
of particles eligible to exit and a sufficient comminution rate of
larger particles to supply particles that were able to pass. For all
diets, the large-particle comminution rate was always higher than the
small-particle outflow rate, indicating that comminution was not the