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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...
Исследования провели на государственной станции племенно-животноводческой станции в Глогувке, на 1115 первотелках низинной кросно-пестрой породы. Каждую первотелку взвешивали в возрасте 18 месяцев, на 10 день перед отелом и 10, 100, 200 и 300 день после отела. Сопоставили их в 3 группах в зависимости от их суточных привесов, от рождения до 18 месяца мизни. I группа — до 650 г, II группа — от 651 до...
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