Uso de Grasa By Pass en Ganado Lechero.

Abstract

The use of lipid substances protected against ruminant fermentation appears as ahigh production level challenge for cow feeding, which are part of a deep negativeenergetic balance after birth. The supplementation with by-pass lipids increasesthe diet energetic density on this kind of cows, without any metabolic risk involvingthe extensive use of large amounts of grain. Present and effective methods areproposed in order to protect these nutrients and several high quality commercial products available in the market. For high-production cows, the experiences got in Argentina and abroad show thatthe appropriate protection of lipid source from ruminant biohydrogenation and the control of negative lipid effects based on fiber ruminant fermentation allow to obtain significant results in production and chemical composition of milk. Within the recommended levels of exceeding grease use in cows of average production (4.000-5.000 liters, the dose in diet is 300-5Q0grs. Perday, and for highproduction cows is 500grs.-1Kg per day without harmful effects. Finally it is necessary to take into account that the correct supplementation basedon protected lipids in high-production cows showed positive effects in production.