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אסיף מאגר המחקר החקלאי
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השפעת אמצעים תזונתיים על שיפור משק החלבון והאנרגיה בפרות חשופות לחום
Principal Investigator :
Moallem, Uzi
;
.
Principal Investigator :
אריאלי, עמיחי
Partner :
Other researchers :
Year:
2005
Project number :
820-0163-05
Research Foundation:
Research Foundation for Dairy and Beef Cattle Sciences
Domain :
Animals
;
.
מדעי בעלי חיים
;
.
The findings in this report are experimental results and do not in any way constitute recommendations
Related Files :
Notes:

 

 

Abstract:
 

Two experiments were conducted during the summer in an individual feeding barn. Cows fed with a 15% CP, 33% RUP, were divided into two nutritional treatments. Control (CON) cows received 18% true NDF whereas treatment cows received 13% true NDF. In the first experiment low forage fiber diet was achieved by replacing 2 kg of wheat hay by soy hulls; In the second experiment 2 kg of whole cottonseeds replaced 2 kg of concentrates. In both experiments, feed intake and milk yield were reduced during the experimental period. In both trials heat production tended to be higher during the cooler daily hours, and average heat production, intake and milk yield were similar between groups. Metabolizable energy intake was higher in the experimental diets. Changes in body weight, as well as blood metabolites concentration indicate that cows were in positive energy balance, while milk energy utilization was apparently not improved by both treatments. It was concluded that reduction of true forage fiber cannot serve as a means for improved diet efficiency in the summer. Yet, as whole cottonseed diet consumption was increased during the hottest day hours suggest an advantage of fat supplementation under summer conditions.

Editors' remarks:
animal feeding
Animals
Bet Dagan (site)
cows
dairy cattle
energy balance
heat stress
temperature
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More details
ID:
37230
Last updated date:
02/03/2022 17:27
Creation date:
12/09/2018 15:30
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Research report
השפעת אמצעים תזונתיים על שיפור משק החלבון והאנרגיה בפרות חשופות לחום
אריאלי, עמיחי
820-0163-05
The findings in this report are experimental results and do not in any way constitute recommendations

 

 

Abstract:
 

Two experiments were conducted during the summer in an individual feeding barn. Cows fed with a 15% CP, 33% RUP, were divided into two nutritional treatments. Control (CON) cows received 18% true NDF whereas treatment cows received 13% true NDF. In the first experiment low forage fiber diet was achieved by replacing 2 kg of wheat hay by soy hulls; In the second experiment 2 kg of whole cottonseeds replaced 2 kg of concentrates. In both experiments, feed intake and milk yield were reduced during the experimental period. In both trials heat production tended to be higher during the cooler daily hours, and average heat production, intake and milk yield were similar between groups. Metabolizable energy intake was higher in the experimental diets. Changes in body weight, as well as blood metabolites concentration indicate that cows were in positive energy balance, while milk energy utilization was apparently not improved by both treatments. It was concluded that reduction of true forage fiber cannot serve as a means for improved diet efficiency in the summer. Yet, as whole cottonseed diet consumption was increased during the hottest day hours suggest an advantage of fat supplementation under summer conditions.

Research report
You may also be interested in