Abstract
ABSTRACT The objective was to evaluate the production, chemical composition and hygienic -sanitary parameters of the milk of Murrah buffaloes raised in the northeastern semi-arid region. Data from 13,752 observations of lactations collected from the years of 2013 to 2016 from a herd in Rio Grande do Norte were used. The milk quality through chemical composition (contents of fat, protein, lactose, and total solids), somatic cell counts (CCS), and milk production was evaluated. Data were submitted to Pearson correlation, factorial analysis, multivariate analysis of variance per year, and per period (dry, rainy and transition) and canonical discriminant analysis by year and period. A high and positive correlation was observed for total solids and fat (0.91) and positive correlation for protein and total solids, yield, and lactose. Through factor analysis, four factors were selected that explained 88% of the total variation. The first factor was considered "milk quality factor, " the second factor as "milk production factor," and the third factor as " sanity factor." There was significant effect based on year but not significant effect based on period for the studied variables. In the canonical discriminant analysis per year, the discriminant power variables were (CCS), milk production and total solids. For periods were protein, production, lactose, fat, and total solids. Multivariate analysis was efficient in evaluating the production and chemical composition of buffalo milk and can be safely used in future studies.
Highlights
The buffaloes have been highlighting out and gaining space in Brazilian livestock sector
This nutritional configuration may be variable considering the processes of environmental, genetic, and nutritional influence. (SOARES et al, 2013; SOUZA et al, 2010). Another crucial parameter to evaluate the milk quality is the somatic cell count (SCC), where high rates of this count may indicate the presence of pathogens in the udder, usually causing mastitis and leading to reduced milk production, and it may interfere in cheese processing that can lead to production losses (CASTRO et al, 2014)
This study aimed to evaluate the production of buffalo milk; it is chemical composition and somatic cell count in the northeastern semi-arid region, using multivariate analyses
Summary
The buffaloes have been highlighting out and gaining space in Brazilian livestock sector. Buffalo milk is considered to be of high nutritional quality, presenting with high levels of lipids, protein, caloric value, vitamin A and calcium, in addition to the presence of levels of conjugated linoleic acid, which helps in the fight against diseases, such as obesity and diabetes characteristics that confirm the great nutritional richness of this raw material (FIGUEIREDO; JÚNIOR; TORO, 2010). This nutritional configuration may be variable considering the processes of environmental, genetic, and nutritional influence. Another crucial parameter to evaluate the milk quality is the somatic cell count (SCC), where high rates of this count may indicate the presence of pathogens in the udder, usually causing mastitis and leading to reduced milk production, and it may interfere in cheese processing that can lead to production losses (CASTRO et al, 2014)
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