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פותח על ידי קלירמאש פתרונות בע"מ -
Estimation of the digestible energy of ruminant feedstuffs by the combined bag technique
Year:
1999
Source of publication :
Journal of Dairy Science
Authors :
מבג'יש, סמיר
;
.
Volume :
82
Co-Authors:
Arieli, A., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Shahar, K., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Mabjeesh, S.J., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Zamwel, S., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Sklan, D., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Facilitators :
From page:
566
To page:
573
(
Total pages:
8
)
Abstract:
The combined bag technique was used to estimate digestible energy of ruminant feedstuffs. Samples of corn, barley, and sorghum grains; soybean and sunflower meals; corn and wheat silages; and vetch and wheat hays were incubated in dacron bags in the rumens of dairy cattle for 3 to 72 h. Bags containing residues after 12 h of ruminal incubation were introduced into the duodenum and recovered from feces. Feeds and ruminal and intestinal residues were analyzed for dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber, and non-structural carbohydrates. The effective ruminal degradability of OM was higher in grains (639 g/kg of DM) and in protein supplements (609 g/kg of DM) than in forages (373 g/kg of DM). For grains and forages, carbohydrates contributed most of the degradable OM in the rumen, but, in protein supplements, about 50% of the ruminally degradable OM originated from carbohydrate. For protein supplements, 54% of the OM that disappeared postruminally was CP, but, in the grains and forage ingredients, CP contributed less than 20% of the postruminal OM that disappeared. In grains and forages, 83% of total tract disappearance of OM was from carbohydrates. For protein supplements, CP contributed 50% to overall OM disappearance. The calculated energy equivalent of digested matter averaged among feeds was 4.71 kcal/g. A high correlation was found between digestible energy estimated by the combined bag technique and the respective National Research Council values. The combined bag technique is a useful tool for the estimation of digestible energy in feedstuffs.
Note:
Related Files :
Animal
Animals
cattle
Combined bag technique
Duodenum
Female
Hordeum
metabolism
Triticum
Zea mays
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
32799
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:12
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Scientific Publication
Estimation of the digestible energy of ruminant feedstuffs by the combined bag technique
82
Arieli, A., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Shahar, K., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Mabjeesh, S.J., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Zamwel, S., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Sklan, D., Department of Animal Science, Faculty of Agricultural, Hebrew University of Jerusalem, Rehovot 76100, Israel
Estimation of the digestible energy of ruminant feedstuffs by the combined bag technique
The combined bag technique was used to estimate digestible energy of ruminant feedstuffs. Samples of corn, barley, and sorghum grains; soybean and sunflower meals; corn and wheat silages; and vetch and wheat hays were incubated in dacron bags in the rumens of dairy cattle for 3 to 72 h. Bags containing residues after 12 h of ruminal incubation were introduced into the duodenum and recovered from feces. Feeds and ruminal and intestinal residues were analyzed for dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber, and non-structural carbohydrates. The effective ruminal degradability of OM was higher in grains (639 g/kg of DM) and in protein supplements (609 g/kg of DM) than in forages (373 g/kg of DM). For grains and forages, carbohydrates contributed most of the degradable OM in the rumen, but, in protein supplements, about 50% of the ruminally degradable OM originated from carbohydrate. For protein supplements, 54% of the OM that disappeared postruminally was CP, but, in the grains and forage ingredients, CP contributed less than 20% of the postruminal OM that disappeared. In grains and forages, 83% of total tract disappearance of OM was from carbohydrates. For protein supplements, CP contributed 50% to overall OM disappearance. The calculated energy equivalent of digested matter averaged among feeds was 4.71 kcal/g. A high correlation was found between digestible energy estimated by the combined bag technique and the respective National Research Council values. The combined bag technique is a useful tool for the estimation of digestible energy in feedstuffs.
Scientific Publication
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