Bovine milk quality related to the minimum requirements demanded by current Brazilian legislation

Abstract

Taking into account the increasing search for quality milk production, the objective was to evaluate the milk quality of 33 properties located in the northwest region of Paraná in 2018, relating them to current legislation (normative instruction 76). The results of standard plate count (SPC), somatic cell count (SCC), fat, non-fat solids, total solids, lactose and protein were tabulated. There was non-compliance related to the legislation of 53% of the samples for SPC and 21.8% for SCC. In the analysis of geometric means, 27.3% presented three consecutive months above the acceptable limits for SCC and 63.6% for SPC. The multiple correspondence analysis of the nonconformity results showed two processes involving, each, three strongly associated variables: SCC, fat and total solids and SCC, lactose and total solids. These associations came from 56.3% of the variability contained in the data set, demonstrating that high SCC results negatively affect the percentages of fat and total solids, in addition to lactose and total solids and that despite technological advances, many producers still find it difficult to meet the legislation.