Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

Copyright © Wydawnictwo Akademii Rolniczej we Wroclawiu, ISSN 1505-0297

Kuczaj M. 2001. INTERRELATIONS BETWEEN YEAR SEASON AND RAW MILK HYGIENIC QUALITY INDICES, EJPAU 4(1), #01.
Available Online: http://www.ejpau.media.pl/volume4/issue1/animal/abs-01.html

ABSTRACT

The aim of this study was to evaluate milk hygienic quality and to determine a relationship between season of year and raw milk quality indices. The experiment was carried out on 38 samples of milk collected from 80 high–production cows managed in a leading cattle breeding centre in south–west Poland. The analysis comprised total bacteria count, somatic cell count in 1 cm³ of milk, chemical composition assay, i.e. fat and protein content, freezing point determination and test for inhibitory substances. The quality of milk was evaluated instrumentally, and the analysis for inhibitory substances was done using Delwotest assay. Both chemical composition and hygienic quality were within the standard set for the Extra class of raw milk. The season of year significantly influenced the chemical composition of milk and somatic cell count, however, it has no effect on freezing point or total bacteria count. Phenotypic correlations (at p < 0.01) between the season of year

Key words: cows, raw milk composition, bacteria count, somatic cells, inhibitory substances, milk freezing point.

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