RT Journal Article
SR Electronic
A1 Šípalová, Markéta
A1 Hanuš, Oto
A1 Buňka, František
A1 Pozdíšek, Jan
A1 Mrkvička, Vladimír
A1 Kráčmar, Stanislav
T1 The effect of selected cereals contained in feed ration on the amino acid composition of cows' milk
JF Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
YR 2014
VO 58
IS 5
SP 369
OP 376
DO 10.11118/actaun201058050369
UL https://acta.mendelu.cz/artkey/acu-201005-0043.php
AB The aim of this study was to evaluate the possible effects of maize replacement in feeding rations on the amino acid content in cows' milk. Cows were fed total mix ration based on the maize, clover silage and hay. There was a difference in the concentrate of the feeding ration. The first group (fed maize) was the control group, another two groups were experimental, one fed wheat and second fed triticale. During six weeks, totally 26 milk samples were taken from dairy cows of Czech Pied breed. Feed groups were preferably balanced in terms of milk yield, stage and number of lactations. The samples of feedstuffs as well as milk were modified for the analysis using acidic and oxidative hydrolyses. The analysis of amino acids content and composition of the sample hydrolysates was performed chromatographically by an AAA 400 analyzer, using Na-citrate buffers and ninhydrin detection. Total nitrogen content was determined according to Kjehldahl and the crude protein of the samples was determined by conversion from the nitrogen content multiplied by appropriate factor. The high content of crude protein in wheat did not influenced composition of milk from dairy cows fed this type of feedstuff. With respect to resulting amino acid content and composition of milk samples, none of the tested grains can be recommended as a full-value maize replacement. Each feedstuff is an abundant source of several and typical amino acids in milk. However, triticale (cultivar Kitaro) seems to be acceptable replacement of maize owing to better crude protein efficiency, composition and health indicators of milk quality.