Diferentes sistemas de manejo e seu reflexo no perfil qualitativo do leite entregue a Cooperativa COPAAL de Aratiba-RS

Abstract

This study aimed to evaluate the quality of milk delivered to cooperative COPAAL, compared to the standards established by both IN 62 and the cooperative, relating the data of the properties with different management systems. The data used was related to the values of routine analysis in 2013, organized and tabulated in order to obtain an average value for protein, fat, lactose, total solids, somatic cell count and total bacterial count for each of the 61 properties analyzed. In order to relate this data with milking management, a questionnaire was applied with 21 variables for all 61 properties. Then the properties were grouped by cluster analysis and the data for each group was subjected to analysis of the descriptive type. Three groups were formed, being named groups G1, G2 and G3 and composed by 44, 2 and 15 properties, respectively. It was found that all groups showed fat, protein, lactose and total solids values according to the standards required by the IN 62 and COPAAL. The group which presented better somatic cell count rates and total bacterial count was G1, being this the one which presented the best milking management compared to other groups.