Crystalline fat in the ration for high yielding dairy cows in early lactation communication 1. effect on roughage intake milk yield and milk contents

Burgstaller, G.; Klein, F.; Propstmeier, G.

Zuechtungskunde 60(5): 398-412

1988


Accession: 007169314

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Abstract
These experiments (milk yield study and metabolism study) worked to the effect of supplemented "crystalline" fat for high yielding dairy cows in the early lactation on the roughage intake, milk yield and milk contents. The tested fat supplementation in a mixed concentrate based on slaughter fat which was treated in a patented "cold-air-spray-crystallisation-process" (Alikon). The test-groups were fed on mixed concentrate with 7,5% or 10,0% "crystalline" fat supplemented to wheat and constante part of the other feed components. The digestibility of the nutrient contents in the mixed concentrate with added fat changed little; the calculated NEL-content per kg DM increased about 0,84 MJ and 1,24 MJ. The average daily fat intake increased to 860 g and 1000 g per animal in the test groups in contrast to the control groups with 430 g and 490 g fat intake and connected with lower total daily feed intake about 0,75 kg DM and 0,90 kg DM (p .ltoreq. 0,05). The consumption of the mixed concentrate fortified with fat was delayed. The mean daily milk yield in the added fat groups improved not significant by daily rations balanced with concentrates to the energetic production needs. The milk fat and milk sugar content was unchanged and the milk protein content decreased at random. Effect on important parameters of metabolism are reserved to the 2, communication (KLEIN et al., 1989) and a last publication works about the effects to the fatty acids profile of the milk (KLEIN et al., 1989).