Evaluación comparativa con dos sistemas de alimentación complementaria (silopack, balanceado) sobre el metabolismo hepático y producción de leche

Abstract

The objective of the present investigation was the comparative evaluation with two systems of complementary feeding (silopack, balanced) on the hepatic metabolism and milk production. In a total of 20 cows with an average of similar milk production, which were divided into 2 haciendas, 10 animals per hacienda. The two haciendas were located geographically in the same area, at an average altitude of 3100 m, with temperatures ranging between 5-18 degrees Celsius. In each farm the 10 animals were subjected to the two types of supplementary feeding, with a dose of 2 kg each, giving a time of adaptation between food of 14 days. In the first instance, all the animals were limited to a normal diet based only on grazing and in milking the food supplement was eliminated. After 14 days of adaptation, silopack was dosed in Agrícola Pogyopata and balanced in Hacienda La Laurita with doses of 2 kg respectively for 7 days. In the same way, while the transition time between food and feed was taking place, samples of blood, milk and production data of the 20 animals were collected. After the expiration of 14 days, the supplement was changed in each Hacienda, then in Agrícola Pogyopata it was dosed balanced and in Hacienda La Laurita silopack with a dose of 2 kg respectively for 7 days. After the two treatments, blood, milk and production data were collected. The best results were supplementation with silopack, obtaining better results in milk production. With the only disadvantage that in 2 analytes evaluated in liver profile (AST, Albumin and Alkaline Phosphatase) there was a slight increase more than normal, but it did not necessarily reflect liver damage