The effect of rape cakes in feed mixtures on the content parameters of cow milk
2000
Simek, M. | Sustala, M. | Vrzalova, D. | Trinacty, J. (Vyzkumny Ustav Vyzivy Zvirat, Pohorelice (Czech Republic))
In a trial performed on 15 dairy cows of Czech Pied cattle feed mixtures for lactating cows with a high proportion of oil cakes from different types of rapeseed pressing (cold pressing and hot pressing) were assessed (mixture S1 with 15 % of rape cakes from cold pressing, mixture S2 with 25 % of rape cakes from hot pressing, against control mixture with 20 % of soybean meal). The content of milk fat was nearly identical for both experimental groups and control (4.33 % for the control group, 4.36 % for S1, and 4.33 % for S2). The fat yield was higher for the experimental groups than for the control group (+44.9 g/day with S1, +69.19 g/day with S2, P0.05). The experimental groups tended to show lower proportions of proteins (-0.10 % with S1, -0.07 % with S2, P0.05), these differences were statistically insignificant. The yield of proteins was 591 g/day for S1, 618 g/day for S2 and 573 g/day for the control group (P0.05). In a direct relation to the total content of proteins both experimental groups showed a statistically significant reduction in the content of casein (-0.20 % with S1 and -0.17 % with S2, P0.01). The casein yield was 501 g/day for S1, 526 g/day for the control group (P0.05).
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