DE RITIS RATIO IN STOMACH TISSUES IN MIXED-AGE PURE-BRED PIGS, GROWN UP IN THE CONDITIONS OF DIFFERENT FARMS

The nature and intensity of age-related changes in the De Ritis coefficient, or the ratio of the enzyme aspartate aminotransferase to alanine aminotransferase, in the tissues of the diverticulum, cardiac, fundal and pyloric parts of the stomach of purebred different-age pigs grown in different farms were studied. The activity of enzymes was determined by spectrophotometric method in the scientific laboratory of the “Chuvash State Agricultural Academy”. It was revealed that during the four-week weaning of pigs (under growing conditions of the pig complex), the nature and intensity of the age-related changes of the studied indicator have their own characteristics. At the same time, the value of the coefficient becomes more stable in piglets of both farms that are in the definitive or plant phase of feeding. The most intensive age-related changes in the De Ritis coefficient of purebred piglets grown under the conditions of the Student Scientific and Production Center “Student” are determined in the tissues of the diverticulum in the first phase of the milk-definitive diet (reduced by 33.8%). In the tissues of the cardiac part, in the second phase of the milk supply (increased by 31.2%). In the tissues of the fundus of the stomach, the De Ritis coefficient is more pronouncedly changing in the milky phase (increased by 2.3 times). In the tissues of the pyloric part - in the colostrum-milky phase of nutrition (increased by 2.1 times). The most intense age-related changes in the De Ritis coefficient of purebred piglets grown under pig farm conditions are detected in the tissues of the diverticulum in the first definitive phase of nutrition (increased by 1.7 times). In the tissues of the cardiac part of the stomach - in the first definitive phase of nutrition (increased by 3.4 times). In the tissues of the fundus of the stomach in piglets, the value of the coefficient changes more intensively only in the colostrum-milky phase of the diet (decreased by 51.4%). In the tissues of the pyloric part of the stomach, De Ritis coefficient with a high intensity changes in the second and third phases of the milk supply (increased by 3.0 times).