SIGNS OF PRODUCTIVITY OF YOUNG PIGS OF LARGE WHITE BREED AND THEIR RELATIONSHIP WITH UREA CONTENT AND ACTIVITY OF SOME BLOOD SERUM ENZYMES
Authors: Халак Віктор 
Published: October 2021

The results of studies of fattening and meat qualities of young pigs of large white breed, some biochemical parameters of blood serum (urea content, aspartate aminotransferase (AsAT) activity, alanine aminotransferase (AlAT) activity are presented), as well as the economic efficiency of research results is calculated. The study was conducted in LLC "Druzhba-Kaznacheyivka"of Dnipropetrovsk region, in the Research center of biosafety and ecological control of agricultural resources of Dnipropetrovsk state agrarian and economic university, meat processing plant «Jazz» and Laborator Livestock y of the State institution Institute of grain crops of NAAS of Ukraine. The work was performed according to the research program of NAAS of Ukraine №30 "Innovative technologies of breeding, industrial and organic production of pig products" ("Pig breeding"), state registration number 0116U001247. The object of the study was young pigs of large white breed. Evaluation of animals for fattening and meat qualities was carried out taking into account the following indicators: average daily live weight gain during the control period of fattening, g, age of live weight 100 kg, days, fat thickness at the level of 6-7 thoracic vertebrae, mm, length of chilled carcass , cm, the length of the bacon half of the cooled half-carcass, cm (M.D. Berezovsky, I.V. Kha’tko, 2005). A comprehensive assessment of young pigs for fattening and meat qualities was calculated according to the B. Tailer index (P.A. Vashchenko, 2019), biometric indicators - according to the methods of G.F. Lakin (1990). Economic efficiency of research results was calculated according to the generally accepted technique (Methodology for determining the economic ..., 1983). It was found that the urea content, activity of aspartate aminotransferase (AsAT) and alanine aminotransferase (AlAT) in the serum of young pigs of the experimental group corresponds to the physiological norm of clinically healthy animals and amount to 4.77±0.576 mol/l, 68.11±6.445 units/l, and 4.22±3.209 units/l, respectively. According to the age of reaching a live weight of 100 kg (days), the thickness of the fat at the level of 6-7 thoracic vertebrae (mm) and the length of the chilled carcass (cm) of the specified production group and breed correspond to class I and class "elite". The maximum values of "average daily gain of live weight during the period of control fattening, kg", "length of chilled carcass, cm", "length of bacon half of chilled carcass, cm" and minimum values of "age of live weight 100 kg, days" and "fat thickness per levels of 6-7 thoracic vertebrae, mm "are characterized by animals in which the complex index of fattening and meat qualities (B. Tailer's index) ranges from 157.68 to 182.36 points. The number of reliable relationships between the biochemical parameters of blood serum, fattening and meat qualities of young white pigs is 26.67 %. The cost of additional products obtained from young pigs with B. Tailer index of 157.68 – 182.36 points is equal to +1732.04 UAH/head.