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Changes of milk and fat yields in the first three lactations of Lowland Red-White /LRW/ and LRW x HF hybrid cows with various contribution of HF genes were investigated. The cows were kept in two big herds with average milk yield 5000 kg per cow per year. The research showed that the hybrid cows had more even first lactation curves when compared to LKW cows. The most even were first lactations of...
The trial was performed on 208 heifers of Lowland Red-White breed raised in south-western part of Poland /Breeding State Farm in Głogówek, Opole voivodeship/. Their body weight was checked at birth, 18 months of age, 10 days before parturition and 100, 200 and 300 days after calving. The influence of growth rate /daily gains/ of heifers during rearing on body weight before calving, on milk yield during...
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