0.857
IF5
0.900
IF
Q3
JCR
0.92
CiteScore
0.405
SJR
Q2
SJR
20
MNiSW
165.24
ICV
ORIGINAL PAPER
 
CC-BY 4.0
 
 

Effect of rumen-protected protein supplemented with three amino acids on milk yield, composition and fatty acid profile in dairy cows

J. Třináctý 1  ,  
S. Hadrová 1,  
O. Hanuš 1,  
B. Janštová 2,  
L. Vorlová 2,  
 
1
Research Institute for Cattle Breeding, Ltd., Department Pohořelice, Vídeňska 699, Pohořelice 691 23, Czech Republic
2
Department of Milk Hygiene and Technology, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
J. Anim. Feed Sci. 2006;15(1):3–15
Publish date: 2006-01-06
KEYWORDS
ABSTRACT
The objective of this study was to determine the influence of rumen-protected protein supplemented with the amino acids lysine (Lys), methionine (Met) and histidine (His) added either as a powder or in the form of rumen-protected tablets to the rumen of dairy cows on the yield, composition and technological suitability of milk. The experiment was carried out on three lactating Holstein cows with an average weight of 523 kg fitted with ruminal and duodenal cannulas. The experiment was divided into 4 periods of 14 d (10 d preliminary period and 4 d experimental period). In the first period one cow received the tablets (T) and the other two received the non-tableted mixture (C) with the same composition. In the subsequent period the design was opposite. Cows were fed a diet based on maize silage, lucerne hay and a supplemental mixture. Powder or tablets consisted of purified soya-protein HP 300, Lys, Met and His. Average milk yield in C cows was 16.73 kg and was significantly lower than in T cows (17.8 kg; P<0.05). Protein, fat and lactose contents were unaffected by the treatment. Protein yield was lower (529.5 g/d) in the C than in the T (569.3 g/d; P<0.05) cows. The increase in milk protein yield in T cows was followed closely by progressive increases in casein content (2.46 vs 2.68%). The content of short- and medium-chain fatty acids was higher and the proportion of C18:1, C18:2, C18:3n3 and C20:1 was lower in the C than in the T (P<0.05) animals. The proportion of UFA (both MUFA and PUFA) was increased and that of SFA in milk (P<0.05) was decreased in the T animals. The total SFA:UFA ratio was higher in C compared with T cows (1.89 vs 1.52; P<0.05).
CORRESPONDING AUTHOR
J. Třináctý   
Research Institute for Cattle Breeding, Ltd., Department Pohořelice, Vídeňska 699, Pohořelice 691 23, Czech Republic
 
CITATIONS (4):
1. Relationship between concentration of health important groups of fatty acids and components and technological properties in cow milk
Oto Hanuš, Eva Samková, Jiří Špička, Kamila Sojková, Kristýna Hanušová, Tomáš Kopec, Marcela Vyletělová, Radoslava Jedelská
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
2. Effect of long-term rumen-protected methionine supplementation on performance of Shami goats and growth performance of their kids
H. H. Titi
Animal Production Science
3. Comparison of actual and predicted amino acid contents in the duodenal digesta of dairy cows
Michal Richter, Jiří Třináctý, Ludmila Křížová
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
4. Critical analysis of excessive utilization of crude protein in ruminants ration: impact on environmental ecosystem and opportunities of supplementation of limiting amino acids—a review
Imtiaz Hussain Raja Abbasi, Farzana Abbasi, Mohamed E. Abd El-Hack, Mervat A. Abdel-Latif, Rab N. Soomro, Khawar Hayat, Mohamed A. E. Mohamed, Bello M. Bodinga, Junhu Yao, Yangchun Cao
Environmental Science and Pollution Research
ISSN:1230-1388