Assessment of the probability of development of diseases of the distal extremities in violation of the rumen function from heavy milking cows

Abstract

In the conditions of the industrial complex for the production of milk, which contained cows of Holstein breed with an average level of productivity of 7.2 thousand kg of milk for the previous lactation, studies were carried out to study the likelihood of the development of diseases of the distal limbs, in case of scarring of high-yielding cows. As a model of dysfunction of rumen acidosis was used, experimentally induced by giving silage with excess acetic acid. It was revealed that in clinically healthy animals, the level of "average" mass (MCM) molecules in the rumen fluid, determined at wavelength 237 nm, was less than 2.0 conv. units, in the blood serum the concentration of MSM at a wave of 254 nm - less than 0.3 conv. units, antihistamine factor titer is less than 1:160. A high degree of likelihood of development within 10 - 15 days diseases of the distal limb indicated an increase in MSM in scar contents at the wavelength of 237 nm over 2.0 CONV. units, in the serum of MSM at a wavelength of 254 nm and greater than 0,3 CONV. units and AGF titer more than 1:160. Control of these parameters allows to predict the development of diseases of the distal limbs in cattle with the aim of preventive measures.