Етологічні та морфо-функціональні особливості статевої циклічності корів в умовах промислового виробництва молока

Abstract

The purpose. To study ethologo-morphological features of manifestation of a stage of sexual excitement at cows of milk breeds in different economic-technological conditions. Methods. Ethological, biotechnological, zoo-technical, and statistical. Results. It is established that in the fixed interval of palpation up to 4 hours from the moment of detection of sexual excitement on the average 59,5% (accordingly, with oscillations in different farms from 41,2 to 68,6%) cows already had the beginning of ovulation of dominant follicle or ovulatory surface of ovary. It is shown that one-time artificial fertilization in a regime of the fixed interval from detection up to palpation has ensured on the average a pregnancy at the level of 60,2%. Conclusions. For heightening productivity of artificial fertilization of cows it is necessary to consider ethological and morpho-functional features of sexual cyclicity at cows.