Produção e composição química do leite em rebanhos mestiços no semiárido mineiro

Abstract

The aim of this work to evaluate the effects of the implantation of good agricultural practices in the quality, production and composition of milk produced by crossbred herds in dairy properties of the north of the state of Minas Gerais, in the period ranging from january 2008 to december 2012, in which it was performed analyses of milk composition and the gathering of information about the system of production. It was obtained the medium of productions and composition of milk per year and per farm. The results were analysed by multiple correspondence in the attemp of stablishing onde assosciation between the variables of climate, of herd, of good agricultural practices and the characteristics of production and composition. These variables were categorized in classes. Estimates of linear associations between the variables production and quality were obtained by the Pearson correlation. It was observed the effect of the year, of the farm, and of the milking practices in the production of milk, fat content, protein and total solids. The season and precipitation did not interfere in the variables researched. The majority of the milk samples analysed presented satisfactory content and protein these parameters were affected by the racial composition, the farm and the milking handling. Even though this study was performed in a region eith low rainfall with compromises the aliment availability, the adoption of good agricultural practises enabled the obtainment of milk that attended the quality parameters in satisfactory volume in the crossbred herds under analysis.