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Protein, fat and DM variation in milk of primiparous Polish Black-and-White Lowland cows in relation to season of year, daily performance and stage of lactation



Protein, fat and DM variation in milk of primiparous Polish Black-and-White Lowland cows in relation to season of year, daily performance and stage of lactation



Roczniki Nauk Rolniczych, B 101(4): 49-62



Observation was on 195 primiparous Polish Black-and-White Lowland cows which calved from March to September. The feed was grass silage and hay in winter and spring and green forage: grass in summer and maize in autumn, supplemented where necessary with concentrates. Daily milk yield was: winter 8.7, spring 7.5, summer 10.3 and autumn 11.1 kg with protein 3.6, 3.5, 3.3 and 3.4%; fat 4.2, 4.3, 4 and 3.6%, and DM 12.9, 13.1, 12.5 and 12.6%.

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