摘要 : The objective of this research was to ascertain the hygiene quality and some physicochemical properties of milk obtained from Wielkopolski mares at different periods of lactation. Colostrum and milk for analyses were collected on ... 展开 The objective of this research was to ascertain the hygiene quality and some physicochemical properties of milk obtained from Wielkopolski mares at different periods of lactation. Colostrum and milk for analyses were collected on days 1, 2, 3, 4 and 5 of lactation and afterwards at 15-day intervals up to day 150 of lactation. A significant influence of lactation on levels of the examined traits was found. Depending on the period of lactation, titratable acidity was found to be 4.6 degrees SH (from 8.6 to 2.5), the mean temperature of milk freezing was -0.541 degrees C and electrical conductivity fluctuated at the interval of 3.8-4.6 mS/cm. The mean somatic cell count during the lactation period amounted to 62x103/cm3 and ranged from 194x103 on the first day of lactation to 41x103 during the last month of lactation. The total count of microorganisms remained within the interval from 33x103/cm3 to 51x103/cm3.. 收起