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Hodnocení směsných krmných dávek pro dojnice pomocí jejich posouzení na separátoru krmiv
Tomášková, Andrea
The aim was to identify and assess the structure of practical ration on the particle separa-tor in holdings breeding more than 3,300 pieces of dairy. For the experiment was elected Penn State particle separator (PSPS), developed in 2002, and its improved model from 2013. The attempt took place at the Farm Majcichov, a.s. the Slovak republic. The total time of the experiment was 16 weeks. During the experiment, the observed structure of the diet, gluttony and performance of dairy cows, the number of animals in the group and the average days of lactation in the group. The qualitative composition of the milk was evaluated using data provided analyzes of milk from dairies. Data were averaged for each week. In the reporting period, the particle size of the feed stable, there were no variations in the structure and content of fiber, it was not possible to assess their impact on the performance of dairy cows. On the upper sieve (19 mm) caught an average 2,5 +- 0,83 % of particles, on the middle sieve (8 mm) 48,7 +- 7,44 % of particles, on the lower sieve (1,18 mm) 26,3 +- 1,98 % of particles and the bottom pen of the separator was sie-ved 22,5 +- 7,18 % of particles. Daily performance was on average 35 liters milk with 3,77 % of fat and 3,25 % of protein. It was found that the content of milk fat and other components of milk had a great influence heat stress in dairy cows.
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