Patrón de comportamiento de las características físico-químicas de la leche en tres tipos de ganaderías

Abstract

The objective of this research was to determine the pattern of behavior of the physical-chemical characteristics of raw milk in livestock corresponding to the Andean area of the province of Azuay. For which 30 farms were sampled, 10 large farms (> 50ha), 10 medium (6ha - 50ha) and 10 small (<5ha) all of Holstein Friesen cows for 6 months. A total of 1381 samples of raw milk were analyzed, of which 834 were from large cattle raising, 337 from medium cattle raising and 210 from small cattle raising. The fat, SNG, total solids, density, cryoscopic point, pH, minerals, water and somatic cell count (CCS) were analyzed to establish the quality of the raw milk in relation to the size of the livestock through these parameters. This research was conducted in the laboratory of Lactology of the Career of Veterinary Medicine and Zootechnics of the University of Cuenca. The study developed was quasiexperimental and the results obtained were recorded in the Excel database to be evaluated in the SPSS program through the Kruskal-Wallis test. The results found in terms of CCS showed statistical difference between small and large herds compared to medium-sized farms that had a lower CCS. Regarding the physical-chemical characteristics of raw milk, the data found did not show significant statistical difference in relation to the size of the herds. The evaluated values are in the range established by the NTE INEN 9: 2012.