Abstract
Annotation. The study was performed on clinically healthy cows of Holstein breed during the period of milking in the CJSC "Gatchina" of the Leningrad region (Russia). Animals (n = 60) were divided into groups depending on the severity of "loaded metabolism" estimated by lead concentration in wool: up to the 25th centile, within the 25th to 75th centile, above the 75th centile. The concentration of lead in wool was determined by atomic emission and mass spectrometry (AES-ICP and MS-ICP). It was found that about the increase in lead content from the minimum to the maximum in centile intervals from 25-75 to> 75, the level of malondialdehyde (Total-MDA) in the blood increased, which was recorded against the background of a decrease in milk productivity. A significant negative correlation was observed between the concentration of lead in wool and the yield of milk fat, protein, dry matter, and corrected for 1% milk fat.
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Schedule a callMore From: IOP Conference Series: Earth and Environmental Science
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