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פותח על ידי קלירמאש פתרונות בע"מ -
Partitioning of amino acids flowing to the abomasum into feed, bacterial, protozoal, and endogenous fractions
Year:
2000
Source of publication :
Journal of Dairy Science
Authors :
ברוקנטל, ישראל
;
.
מבג'יש, סמיר
;
.
Volume :
83
Co-Authors:
Shabi, Z., Department of Animal Science, Fac. Agric., Food Environ. Qual. S., Rehovet 76100, Israel
Tagari, H.
Murphy, M.R., Department of Animal Sciences, University of Illinois, Urbana, IL 61801, United States
Bruckental, I.
Mabjeesh, S.J.
Zamwel, S.
Celik, K.
Arieli, A.
Facilitators :
From page:
2326
To page:
2334
(
Total pages:
9
)
Abstract:
We partitioned the flow of amino acids (AA) to the abomasum among rumen undegradable protein (RUP) and bacterial, protozoal, and endogenous fractions using four Holstein cows in midlactation that were equipped with ruminal and abomasal cannulas. A 2 × 2 factorial design with four diets, combinations of high or low ruminally degradable organic matter, and rumen degradable protein, was employed. Crude protein (CP) and AA contents of ruminal bacteria and protozoa and abomasal digesta were determined. Equations for the source compositions and in vivo flows of CP and 16 AA were then solved simultaneously with a linear program to estimate the contribution of RUP, bacterial, protozoal, and endogenous CP to AA flows. The flows of RUP and bacterial AA were not affected by diet. Low dietary RDP increased the flow of protozoal AA to the abomasum, but the ruminally degradable organic matter content of the diet did not affect protozoal AA flow. Across diets, RUP, bacterial, protozoal, and endogenous fractions provided 55, 33, 11, and <1% of the CP, and 62, 26, 12, and <1% of the AA that reached the abomasum. The linear program was a useful tool for partitioning AA that flows to the abomasum. The technique may also allow dietary effects on ruminal microbes and the AA profile of protein flowing to the duodenum to be better understood and perhaps manipulated.
Note:
Related Files :
Amino Acids
Animal
Animals
bacteria
cattle
Female
lactation
metabolism
Microbiology
Parasitology
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27428
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:31
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Scientific Publication
Partitioning of amino acids flowing to the abomasum into feed, bacterial, protozoal, and endogenous fractions
83
Shabi, Z., Department of Animal Science, Fac. Agric., Food Environ. Qual. S., Rehovet 76100, Israel
Tagari, H.
Murphy, M.R., Department of Animal Sciences, University of Illinois, Urbana, IL 61801, United States
Bruckental, I.
Mabjeesh, S.J.
Zamwel, S.
Celik, K.
Arieli, A.
Partitioning of amino acids flowing to the abomasum into feed, bacterial, protozoal, and endogenous fractions
We partitioned the flow of amino acids (AA) to the abomasum among rumen undegradable protein (RUP) and bacterial, protozoal, and endogenous fractions using four Holstein cows in midlactation that were equipped with ruminal and abomasal cannulas. A 2 × 2 factorial design with four diets, combinations of high or low ruminally degradable organic matter, and rumen degradable protein, was employed. Crude protein (CP) and AA contents of ruminal bacteria and protozoa and abomasal digesta were determined. Equations for the source compositions and in vivo flows of CP and 16 AA were then solved simultaneously with a linear program to estimate the contribution of RUP, bacterial, protozoal, and endogenous CP to AA flows. The flows of RUP and bacterial AA were not affected by diet. Low dietary RDP increased the flow of protozoal AA to the abomasum, but the ruminally degradable organic matter content of the diet did not affect protozoal AA flow. Across diets, RUP, bacterial, protozoal, and endogenous fractions provided 55, 33, 11, and <1% of the CP, and 62, 26, 12, and <1% of the AA that reached the abomasum. The linear program was a useful tool for partitioning AA that flows to the abomasum. The technique may also allow dietary effects on ruminal microbes and the AA profile of protein flowing to the duodenum to be better understood and perhaps manipulated.
Scientific Publication
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