Qualidade do leite de vacas da raça Jersey criadas em sistema Compost Barn

Abstract

The quality of milk has become increasingly sought after by producers and demanded by industries and the consumer market. Quality milk is one that is safe for consumption, the processing dairy derivatives and with complete nutritional constituents. Given the importance of evaluating milk quality, the present study aims to analyze the physicochemical, parameters composition and SCC of milk from Jersey cows raised in the Compost Barn system from August 2020 to August 2023. 91 analysis reports of milk in tanks issued by LABOLEITE/UFRN. The parameters evaluated in the study were milk composition (Fat, Protein, Lactose, Non-Fat Solids and Total Solids) and Somatic Cell Count (SCC). Annual and monthly averages of the evaluated parameters were obtained. The results were organized into monthly and annual averages, which showed evolution in milk quality from the second half of 2022 onwards. The composition averages presented values in accordance with the limits established by IN nº 76, except for the annual averages of the SNG 2020 in 2022, which were lower. The annual CCS averages from 2020 to 2023 were below the maximum limit allowed by IN nº 76 of 500,000 cells/mL, with fluctuations in monetary averages each year, with a relevant reduction in CCS averages from the second half of 2022 until August 2023, reaching the lowest monthly average of 166 thousand cells/mL in the period evaluated. Therefore, it is essential to monitor the milk analysis of tank samples to identify possible problems that may be interfering with the qualitative parameters of the milk. More specific studies are needed to have an assertive diagnosis of the factors that about influence the health of the mammary gland and the composition of milk.