Open AccessRESEARCH A SUCKING ACT OF CALVES
Author(s) -
Л.Р. Загидуллин,
Radik Shaydullin,
Rifat Hisamov,
R.R. Kayumov,
I.V. Lomakin
Publication year - 2020
Publication title -
vestnik kazanskogo gosudarstvennogo agrarnogo universiteta
Language(s) - English
Resource type - Journals
ISSN - 2073-0462
DOI - 10.12737/2073-0462-2020-37-41
Subject(s) - udder , medicine , zoology , age groups , biology , demography , pathology , sociology , mastitis
The article describes a new device for studying the act of sucking in animals. The device is designed to record the parameters that occur during the sucking act: compression forces, pushing forces, rarefaction, their amplitudes, frequencies and phases. Studies were conducted among 10 calves at different ages to determine the parameters of the sucking process. It was found that the minimum dilution in the oral cavity of a calf is observed at 2 days of age - 10.5 kPa. At 7 days of age, it amounted to 14.9 kPa, at 12 days of age - 17.3. The maximum value is observed at 28 days of age - 27.1 kPa. The compression force on the nipple also increases with age. If at 2 days of age it is 28.8 N, then at 28 days of age it is 59.1 N. When sucking, calves push the udder with an effort of 28.0 (2 days old), 31.3 (7 days) 38.9 (12 days), 46.1 (17 days), 50.1 (22 days) and 51.2 N (28 days). The frequency of sucking movements varies from 1.8 to 2.3 Hz, respectively, at 2 and 28 days of age.