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Evaluation of protein flow to the duodenum in dairy cattle by the in sacco method
Year:
1993
Source of publication :
Livestock Production Science
Authors :
Brukental, Israel
;
.
Mabjeesh, Sameer Jermaya
;
.
Volume :
35
Co-Authors:
Arieli, A., Department of Animal Science, Faculty of Agriculture, Rehovot, Israel
Mabjeesh, S., Department of Animal Science, Faculty of Agriculture, Rehovot, Israel
Tagari, H., Department of Animal Science, Faculty of Agriculture, Rehovot, Israel
Bruckental, I., Institute of Animal Science, Agriculture Research Organization, The Volcani Centre, Bet Dagan, Israel
Zamwell, S., Institute of Animal Science, Agriculture Research Organization, The Volcani Centre, Bet Dagan, Israel
Facilitators :
From page:
283
To page:
292
(
Total pages:
10
)
Abstract:
In situ evaluation of the amount and composition of duodenal crude protein flow was examined in a 4×4 Latin square study using four lactating Holstein cows fitted with ruminal and duodenal cannulas. Dietary supplemental CP sources, making up 40% of the dietary CP, were: soybean meal, cottonseed meal, corn gluten meal or urea. Duodenal flow of organic matter (OM) and CP was determined in vivo by means of constant infusion of Yb and Cr, and was predicted in situ from rumen degradation. Purines were used as microbial markers. The two methods of estimating ruminally undegraded protein ranked the diets similarly. Microbial CP (1.9 to 2.1 kg/d) was estimated to make up 57% to 68% of the duodenal CP flow in the experimental diets. Efficiency of microbial protein synthesis were 201 (SEM 16) g CP/kg OM truly digested in the rumen, and 224 (SEM 18) g CP/kg OM disappearing in the rumen. Data are interpreted to suggest that the in situ method enables a prediction of total protein flow to the duodenum which is comparable to that obtained using the in vivo method. The added practicality of the former method renders it advantageous. © 1993.
Note:
Related Files :
Cow, Dacron bag
Duodenal protein
Microbial yield
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More details
DOI :
10.1016/0301-6226(93)90098-3
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19956
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:32
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Scientific Publication
Evaluation of protein flow to the duodenum in dairy cattle by the in sacco method
35
Arieli, A., Department of Animal Science, Faculty of Agriculture, Rehovot, Israel
Mabjeesh, S., Department of Animal Science, Faculty of Agriculture, Rehovot, Israel
Tagari, H., Department of Animal Science, Faculty of Agriculture, Rehovot, Israel
Bruckental, I., Institute of Animal Science, Agriculture Research Organization, The Volcani Centre, Bet Dagan, Israel
Zamwell, S., Institute of Animal Science, Agriculture Research Organization, The Volcani Centre, Bet Dagan, Israel
Evaluation of protein flow to the duodenum in dairy cattle by the in sacco method
In situ evaluation of the amount and composition of duodenal crude protein flow was examined in a 4×4 Latin square study using four lactating Holstein cows fitted with ruminal and duodenal cannulas. Dietary supplemental CP sources, making up 40% of the dietary CP, were: soybean meal, cottonseed meal, corn gluten meal or urea. Duodenal flow of organic matter (OM) and CP was determined in vivo by means of constant infusion of Yb and Cr, and was predicted in situ from rumen degradation. Purines were used as microbial markers. The two methods of estimating ruminally undegraded protein ranked the diets similarly. Microbial CP (1.9 to 2.1 kg/d) was estimated to make up 57% to 68% of the duodenal CP flow in the experimental diets. Efficiency of microbial protein synthesis were 201 (SEM 16) g CP/kg OM truly digested in the rumen, and 224 (SEM 18) g CP/kg OM disappearing in the rumen. Data are interpreted to suggest that the in situ method enables a prediction of total protein flow to the duodenum which is comparable to that obtained using the in vivo method. The added practicality of the former method renders it advantageous. © 1993.
Scientific Publication
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