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The paper indicates the transformations of fatty acids from the fodder in the rumen, and their impact on milk fat composition in the aspect of health-related properties. Modifications of food doses affect, inter alia, the amount of vaccenic acid isomer absorbed in the duodenum, as well as linolenic and linoleic acids with their isomers. However, the accurate analysis of fat given in fodder is required...
The examinations of the effect of feed supplements, Acetona and Melwit, and ergotropics, Avotan and Avatec, in feeding dairy cows, were carried out on low-land black-and- white cows, in various lactation periods and at low and high nutrition levels. When compared to the control sample, it was found out that at a high nutrition level, Melwit and Acetona increased milk yield by 11.3% and 3.6% respectively,...
The purpose of study was to determine the effect of supplements added to the diet of cows during the "dried" period, on the subsequent milk production and offspring performances. The IInd experimental group of cows was fed with MONOMIX supplement, the IIIth group with Na₂HCO₃+MgO, the IVth group with B-composition, while the Ist group was settled as a control. It was concluded, that both,...
The purpose of study was to determine the effect of the cows diet supplementation with vitamin-mineral premix /Monomix/ as well as buffer compounds, fed during the period before and after delivery, on the collostrum and milk composition, milk yield and calves performance. The study's conclusions were, that 150 g/cows of Monomix given to the diet on 6 weeks before and A weeks after parturition affected...
Study was conducted on 43 Lowland-Black-White cows kept tethered and on straw bedding, where the annual average milk yield was on the level of 3890 kg/cow, and on 22 cows from free-stand, concrete floor barn, with the milk production of 3200 kg/cow. On the ground of preliminary assignments of ketone body and acid base balance, cows were allotted to one of three groups: Ith - group of healthy animals,...
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