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קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Effect of the Degradation of Organic Matter and Crude Protein on Ruminal Fermentation in Dairy Cows
Year:
1996
Source of publication :
Journal of Dairy Science
Authors :
אהרוני, יואב
;
.
ברוקנטל, ישראל
;
.
Volume :
79
Co-Authors:
Arieli, A., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel, Department of Animal Science, Faculty of Agriculture, Rehovot 76100, Israel
Shabi, Z., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel
Bruckental, I., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan and Neve-Yaar, Israel
Tagari, H., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel
Aharoni, Y., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan and Neve-Yaar, Israel
Zamwell, S., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel
Voet, H., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel
Facilitators :
From page:
1774
To page:
1780
(
Total pages:
7
)
Abstract:
The potential of the dacron bag technique to assess fluctuations in ruminal metabolites was studied using 40 Israeli-Friesian dairy cows assigned to an experiment with a 2 × 2 factorial design. Diets contained a low (62%) or high (65%) percentage of ruminally degradable CP and a low (55%) or high (59%) percentage of ruminally degradable OM. Metabolites were monitored before feeding and at 3 and 6 h postfeeding. Before feeding, total VFA and propionate were higher, and acetate and pH were lower, in diets containing a high percentage of ruminally degradable OM than in diets containing a low percentage of degradable OM. By 3 h postfeeding, acetate, butyrate and pH were lower, and propionate was higher, in the diets containing a high percentage of ruminally degradable OM than in the diets containing a low percentage of ruminally degradable OM. By 6 h postfeeding, propionate was higher, and acetate was lower, in diets containing a high percentage of ruminally degradable OM than in diets containing a low percentage of ruminally degradable OM. In the diets with a high percentage of ruminally degradable OM, before feeding and by 3 h postfeeding, ammonia concentrations were higher and lower, respectively, relative to the diets containing a low percentage of degradable OM. Milk yield and composition and DMI were similar among treatments. The correlation was good between the degradability data obtained by the dacron bag technique and the meal-induced variations in ruminal metabolites. The lack of a positive yield response to controlled fluctuations in ruminal metabolites may be related to surplus CP intake.
Note:
Related Files :
Animal
Animals
cattle
Female
Fermentation
lactation
metabolism
pH
Rumen
urea nitrogen blood level
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
19564
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:30
You may also be interested in
Scientific Publication
Effect of the Degradation of Organic Matter and Crude Protein on Ruminal Fermentation in Dairy Cows
79
Arieli, A., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel, Department of Animal Science, Faculty of Agriculture, Rehovot 76100, Israel
Shabi, Z., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel
Bruckental, I., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan and Neve-Yaar, Israel
Tagari, H., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel
Aharoni, Y., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan and Neve-Yaar, Israel
Zamwell, S., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel
Voet, H., Hebrew University, Faculty of Agriculture, Rehovot 76100, Israel
Effect of the Degradation of Organic Matter and Crude Protein on Ruminal Fermentation in Dairy Cows
The potential of the dacron bag technique to assess fluctuations in ruminal metabolites was studied using 40 Israeli-Friesian dairy cows assigned to an experiment with a 2 × 2 factorial design. Diets contained a low (62%) or high (65%) percentage of ruminally degradable CP and a low (55%) or high (59%) percentage of ruminally degradable OM. Metabolites were monitored before feeding and at 3 and 6 h postfeeding. Before feeding, total VFA and propionate were higher, and acetate and pH were lower, in diets containing a high percentage of ruminally degradable OM than in diets containing a low percentage of degradable OM. By 3 h postfeeding, acetate, butyrate and pH were lower, and propionate was higher, in the diets containing a high percentage of ruminally degradable OM than in the diets containing a low percentage of ruminally degradable OM. By 6 h postfeeding, propionate was higher, and acetate was lower, in diets containing a high percentage of ruminally degradable OM than in diets containing a low percentage of ruminally degradable OM. In the diets with a high percentage of ruminally degradable OM, before feeding and by 3 h postfeeding, ammonia concentrations were higher and lower, respectively, relative to the diets containing a low percentage of degradable OM. Milk yield and composition and DMI were similar among treatments. The correlation was good between the degradability data obtained by the dacron bag technique and the meal-induced variations in ruminal metabolites. The lack of a positive yield response to controlled fluctuations in ruminal metabolites may be related to surplus CP intake.
Scientific Publication
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