Physiological - biochemical status of cows organism of the influence silica marl

There is determined the most effective biological silica marl feed dose for holsteir breed to normalizate the physiological - biochemical status of organism. The biggest content of heavy metals is determined in the flesh of three - way bred bull - calts, smallest by bull - calts of bestushevo. As a result of conducted researches the relation of concentration of heavy metals in milk of the cows from a level and source of biological silica in a ration is established. Biological silica of connection promotes a decrease of the contents of toxiferous members in milk.