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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
The effect of undegradable crude protein supplementation on milk production and composition and reproduction of early-lactating cows
Year:
1996
Authors :
אהרוני, יואב
;
.
ברוקנטל, ישראל
;
.
גניזי, אברהם
;
.
Volume :
5
Co-Authors:
Bruckental, I., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan 50-250, Israel
Tagari, H., Department of Animal Science, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76-100, Israel
Arieli, A., Department of Animal Science, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76-100, Israel
Zamwell, S., Department of Animal Science, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76-100, Israel
Aharoni, Y., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan 50-250, Israel
Genizi, A., Department of Statistics and Experimental Design, Agricultural Research Organization, Volcani Center, Bet Dagan 50-250, Israel
Facilitators :
From page:
95
To page:
106
(
Total pages:
12
)
Abstract:
One hundred and fifty six Israeli-Holstein cows were randomly allotted to two groups in a continuous design; of these, 59 cows entered the trial within 14 days postpartum. The trial lasted 75 days. Diet 1 (control group) contained 16.5% crude protein (CP), of which 11.0% was rumen-degradable (RDCP). Diet 2 (high-protein; HP) contained 17.8% CP; all the additional protein was planned to be rumen-undegradable. Cows were group-fed. Feed intake and milk yield were recorded daily and milk composition was analyzed every 2 weeks. Dry matter intake, milk, milk fat and protein yields (kg/d) of the control and HP treatments were 21.2 and 20.7 (P≤0.05), 34.3 and 35.5 (P≤0.05), 0.866 and 0.935 (P≤0.05), and 0.963 and 1.002 (P≤0.05), respectively. Average milk, milk fat and protein yields in the control and HP cows that entered the trial within 0-21 d after calving, were 37.0 and 39.6 (P≤0.05), 0.992 and 1.043, and 0.985 and 1.056 (P≤0.05) kg/d, respectively. Supplementation of additional undegradable CP at the beginning of lactation, tended to improve reproductive performance, which was attributed to the earlier recovery of body condition score of those cows.
Note:
Related Files :
lactating cows
Reproduction
Undegradable crude protein
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
19877
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:32
You may also be interested in
Scientific Publication
The effect of undegradable crude protein supplementation on milk production and composition and reproduction of early-lactating cows
5
Bruckental, I., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan 50-250, Israel
Tagari, H., Department of Animal Science, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76-100, Israel
Arieli, A., Department of Animal Science, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76-100, Israel
Zamwell, S., Department of Animal Science, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76-100, Israel
Aharoni, Y., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan 50-250, Israel
Genizi, A., Department of Statistics and Experimental Design, Agricultural Research Organization, Volcani Center, Bet Dagan 50-250, Israel
The effect of undegradable crude protein supplementation on milk production and composition and reproduction of early-lactating cows
One hundred and fifty six Israeli-Holstein cows were randomly allotted to two groups in a continuous design; of these, 59 cows entered the trial within 14 days postpartum. The trial lasted 75 days. Diet 1 (control group) contained 16.5% crude protein (CP), of which 11.0% was rumen-degradable (RDCP). Diet 2 (high-protein; HP) contained 17.8% CP; all the additional protein was planned to be rumen-undegradable. Cows were group-fed. Feed intake and milk yield were recorded daily and milk composition was analyzed every 2 weeks. Dry matter intake, milk, milk fat and protein yields (kg/d) of the control and HP treatments were 21.2 and 20.7 (P≤0.05), 34.3 and 35.5 (P≤0.05), 0.866 and 0.935 (P≤0.05), and 0.963 and 1.002 (P≤0.05), respectively. Average milk, milk fat and protein yields in the control and HP cows that entered the trial within 0-21 d after calving, were 37.0 and 39.6 (P≤0.05), 0.992 and 1.043, and 0.985 and 1.056 (P≤0.05) kg/d, respectively. Supplementation of additional undegradable CP at the beginning of lactation, tended to improve reproductive performance, which was attributed to the earlier recovery of body condition score of those cows.
Scientific Publication
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