In the conditions of the Republic of Belarus there was studied the interrelation between content of major nutrient elements (calcium and phosphorous) and trace elements (iron, copper, cobalt, and manganese) in forages and blood of first-calf cows at the first and last stages of lactation. Also, there were developed formulas of mixed forages and a premix for these animals. The studies were realized at the Agricultural Production Co-operative Olgovskoe of Vitebsk region (Belarus). Research of analysis of forages and state of mineral metabolismat heifers made it possible to draw following conclusions: in cow rations there was marked the deficiency of vitamin D, as well as some trace elements (cobalt and manganese) in the conditions of calcium and phosphorus excess. In spite of a high content in a calcium in diets, it was noted than in blood plasma the concentration of this element was below the standard for the majority of animals. Lack of cobalt and manganese of whole blood of cows was connected with a low level of these elements in cow diets. The surplus contents of copper in forages and blood of animals against the background low activity of ceruloplasmin the weakened antioxidant defense of heifer cows. For preventive treatment of possible hypo trace element deficiencies and metabolic disorders of heifer cows at the final stage of lactation there can be recommended the correcting of cow diets with inclusion into their composition of the developed for compound of mixed fodder and premix.

In the conditions of the Republic of Belarus there was studied the efficiency of application of granulated and extruded lupine (Lupinus) in feeding of bull claves. It was determined that after lupine extruding the quantity of sugar in it increased on 45% due to lowering of starch content. The inclusion of extruded lupine into bull calves diets made it possible to increase the digestibility of dry and organic substances, protein and nitrogen-free extractive substances. The highest average daily weight gain (842 gram) was stated at claves which were fed with mixed fodder with 15% of extruded lupine; this was on 7,5% than in a control group. In the conditions of feeding with the granulated lupine the average daily weight gain increased on 5,3% in comparison with crushed one. In course of study there was analyzed the dependence chemical composition of lupine on the processing method; blood composition of the studied animals; diets of experimental animals; digestibility of nutrient substances of forages; balance and intake of nitrogen; biochemical blood composition; changes of live weight and average daily weight gain.

In the conditions of the Republic of Belarus there was studied the formation of nonspecific protection factors of the first year foals. By a principle of conditional analogues there was generated a group of clinically healthy foals at which monthly from bulbar veins there were taken tests of blood for hematological and biochemical analysis. From the obtained data it was visible, that within the first year of foal life there were taking place the processes of formation of nonspecific protection factors of an organism which were accompanied by a gradual increasing of quantity of erythrocytes, haemoglobin, leukocytes, certain change in the diagramme, and also increasing of bactericidal and lysozyme activity of blood serum. However, at seven-month age there was marked a considerable decrease in number of erythrocytes, leukocytes, concentration of haemoglobin, bactericidal and lysozyme activity of blood serum is marked, in leukogram share reduction of segmented neutrophils, and at the same time, the content of eosinocytes and lymphocytes increased. It testified the decreasing of protective forces of an organism during this period. Consequently, the seventh month in the postnatal period of foal life proved to be the most critical.

Investigation of influence of water improved by potassium permanganate solution on welfare and productivity of piglets was realized in the conditions of swine breeding complex in the Republic of Belarus. In the experiment there were used 2 groups of 30-day old piglets. In course of 75 days of experiment the running water of pig complex was used for watering of piglets of control group. Piglets from the experimental group were given water with addition of 0,1% solution of potassium permanganate. Analysis of obtained results showed that water with potassium permanganate promoted the increasing of natural resistance of piglets. At the same time there was stated the increasing of lysozyme and bacterial activityin blood serum. Application of improved water promoted the increasing hemoglobin on 4,8-4,5%, erythrocytes - on 2,9-4,2% in comparison with control. Content of total protein increased on 2,2-2,8% in the experimental groups, lisozyme activity - 6,9-7,0% and bacterial activity - on 5-6,9%. Application of improved water did not influence the glucose and potassium concentration in blood. In the experimental group there was stated the increased lipid concentration on 3,1-6%, cholesterol - on 4,4-6,3%, potassium level - on 2,5-4,5%, phosphorus - on 0,7-5,3%, sodium - on 1,4-3,8%. Application of water with КMnО4 increased average daily weight gain on 5,2-4,2%

The purpose of the research was establishment of hepatic diseases spread in cattle fattening. Trials were conducted with total number of hybrids IV-V generation of black-motley heifer with pedigree Hereford bulls. It has been established the wide spread (22,4%) of hepatic pathology. The leading place among all hepatic pathologies belongs to fatty hepatosis (13,4%) with weakly expressed symptoms, decrease of serum protein level, albumin, glucose and increase of bilirubin, globulins, hepatic enzymes and strong pathology-anatomical and histological manifestations. In the tabular form results of histologic research of liver, some biochemical indicators of blood of healthy and sick animals (M +/- m), the clinical symptoms revealed during the various periods are resulted | Целью исследований являлось изучение структуры и установление широты распространения болезней печени у крупного рогатого скота на откорме. Опыты проведены на широком поголовье помесей IV-V поколения тёлок чёрно-пёстрой породы с племенными быками герефордской породы. Установлено широкое (22,4%) распространение гепатопатий. Ведущее место среди различных форм поражения печени принадлежит жировому гепатозу - 13,4%, морфофункцинальный профиль которого определяется слабо выраженными клиническими симптомами, уменьшением уровня общего белка, альбуминов, глюкозы, повышением концентрации билирубина, активности гепатоспецифических ферментов, а также всех фракций глобулинов, яркой и характерной патологоанатомической и гистологической картиной. В табличной форме приведены результаты гистологического исследования печени, некоторые биохимические показатели крови здоровых и больных животных (M +/- m), клинические симптомы, выявленные в различные периоды

In the conditions of the Republic of Belarus there was studied the influence of herbal infusion, tincture, liquid and dry extracts of elecampane (Inula helenium) on morphological and biochemical indexes of pig blood. In course of the study it was established, that preparative forms of elecampane stimulated the formation of blood corpuscle, and also increased of the hemoglobin level in blood of pigs. Administration of elecampane preparations did not cause any authentic changes in blood leukogram of swine; all indicators were within normal limits. Elecampane preparations did not cause changes on the part of biochemical blood indexes of and did not influence the activity of enzymes. Research results showed that herbal infusion, tincture, liquid and dry extracts of elecampane did not render negative influence on swine.