ORIGINAL PAPER
The effect of different physical forms of rapeseed as a fat supplement on the activity of some enzymes in the duodenal chyme of dairy cows
A. Moharrery 1  
,   M. Brask 2,   M. R. Weisbjerg 2
 
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1
Shahrekord University, Animal Science Department, Agricultural College, P.O. Box 115, Shahrekord, Iran
2
Aarhus University, Department of Animal Science, Foulum, DK-8830 Tjele, Denmark
CORRESPONDING AUTHOR
A. Moharrery   

Shahrekord University, Animal Science Department, Agricultural College, P.O. Box 115, Shahrekord, Iran
Publication date: 2014-11-27
 
J. Anim. Feed Sci. 2014;23(4):293–298
 
KEYWORDS
ABSTRACT
Studies on nutritional regulation of digestive enzymes in ruminants are scarce. Fat supplementation of diets for dairy cows changes the supply of nutrients for absorption and transport. The aim of this experiment was to study the effect of the physical form of rapeseed (Brassica napus) fat on the duodenal enzyme profile in dairy cows. Four mid-lactation Danish Holstein dairy cows were submitted to an experiment with a 4 × 4 Latin square design and fed four rations containing 50% forage and 50% concentrate on a dry matter basis. The four rations were: a control ration with rapeseed meal (low fat) and three fat-supplemented rations with either rapeseed cake (RSC), whole cracked rape seed (WCR), or rapeseed oil (RSO). The correlation coefficients among duodenal enzyme activities and the relationship between α-amylase and protease activities were examined. Diurnal samples were taken from the duodenum, frozen immediately and stored frozen (–20°C) before analyses. Additional fat increased the soluble protein content in duodenal chyme (P < 0.05). Neither α-amylase nor the protease or soluble sugar concentrations were affected by the treatments. Lipase activity increased for RSO compared with the control. The relationship between α-amylase and protease activities showed a parabolic behaviour (r = 0.77; P = 0.061). In conclusion, inclusion of rapeseed oil in the ration of dairy cows under the experimental conditions increased the soluble protein concentration and lipase activity in duodenal chyme.
 
CITATIONS (5):
1.
The effect of rolled barley, sodium hydroxide-treated wheat or maize cob silage on digestive enzymes activity in the alimentary tract of dairy cows
A. Moharrery, L. Hymøller, M. Weisbjerg
Journal of Animal and Feed Sciences
 
2.
The effect of supplementing sheep with rapeseed and linseed oils on the activity of pancreatic digestive enzymes
Barbara Kowalik, Małgorzata P. Majewska, Renata Miltko, Grzegorz Bełżecki
Journal of Animal Physiology and Animal Nutrition
 
3.
Jejunal barrier dysfunction of Datong Yak with high proportion concentrate dietary during the cold season
Jianlei Jia, Chunnian Liang, Xiaoyun Wu, Lin Xiong, Pengjia Bao, Qian Chen, Ping Yan
 
4.
Effect of high proportion concentrate dietary on Yak jejunal structure, physiological function and protein composition during cold season
Jianlei Jia, Chunnian Liang, Xiaoyun Wu, Lin Xiong, Pengjia Bao, Qian Chen, Ping Yan
Scientific Reports
 
5.
High proportion concentrate dietary brings to Ashdan Yak jejunal barrier and microbial dysfunction during cold season
Jianlei Jia, Chunnian Liang, Xiaoyun Wu, Lin Xiong, Pengjia Bao, Qian Chen, Ping Yan
Research in Veterinary Science
 
ISSN:1230-1388