METHOD OF ASSESSMENT OF STRESS RESISTANCE OF COWS Russian patent published in 2014 - IPC A01K67/02 

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture. The method comprises exposure to animals during machine milking of the stress factor and recording of changes of lactation performance, determining of stress resistance of cows according to the mean value of the sum of estimated figures - the ratio of 1% milk, the change of intensity and completeness of lactation. At that the parameter of lactation reflex manifestation is additionally taken into account - the duration of the second phase of the latent period. The calculation is carried out according to the formula: where N is the number of estimated figures; M_O, M_K, WFF_O, WFF_K, IL_O, IL_K - is a single milk yield (kg), weight fraction of fat in milk (%), the intensity of lactation (kg/min); DSPLP_O, DSPLP_K is the duration of the second phase of the latent period (s) in the test and the control period; M_RES, WFF_RES is residual milk (kg) and weight fraction of fat (%) in it during the test period. In this case, if the PSTR is within 0.901-1.00, these cows belong to high (H) type of stress resistance, in the case of 0.801-0.900 they belong to the average one, and if it is 0.800 and lower they belong to the low type of stress resistance.

EFFECT: method enables to enhance the efficiency of assessment.

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