At our family farm, Klun, we are engaged in breeding Aberdeen Angus suckler cows.
In recent years, we have produced low-quality roughage feed. The aim of this thesis was
to analyse the daily ration according to the management model of nutrition of cows
(Orešnik, 1996). We used the requirements for dairy cows. In April 2024, we took
samples of hay and grass silage. In the chemistry laboratory of the Department of
Animal Science, they performed NIR spectrometry, which indicated poor quality
roughage feed compared to the Slovenian average. The roughage feed on the farm (hay,
grass silage) was of poor quality due to delayed mowing and insufficient fertilization.
Mainly, there was too much crude fibre and a lack of energy. Analysis of a ration for
suckler cows with 10 litres of milk showed that the ration contained too much crude
fibre and not enough energy, but the amount of digestible crude protein was adequate.
The Ca : P ratio was adequate and the K : Na ratio was too low. The analysis of the
ration for suckler cows with 15 litres of milk showed that the ration contained too much
SV and a not enough energy, but the amount of digestible crude protein was adequate.
The Ca : P ratio was adequate and the K : Na ratio was too low. After the new proposal
for both rations, the energy deficiency was corrected by the addition of cereals and the
K : Na ratio was corrected by the addition of salt. However, to improve the SV content,
we need to prepare a better roughage.
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