In the process of monogastric animal feeding, including pigs, the special role is played by the quality of coarse grain crops as they compose 70-75% of swine ration structure. Determination of fodder productive effect on fattening swine was realized in the conditions of the Republic of Belarus. The basis of the analyzed fodder was formed by fodder grain of extra fine grade. Research results showed the following: inclusion of extra fine grade barley (Hordeum vulgare) and wheat (Triticum aestivum) (chosen in accordance with the standard of the Republic of Belarus) into all-in-one mixed fodders SK-26 and SK-31 for fattening swine made it possible to obtain higher productive capacity of the experimental animals in comparison with the identical mixed fodders containing barley and wheat of other grades (chosen in accordance with All-Union State Standard 28672-90); in the experimental groups the average daily weight gain in course of the fattening period was on 34 grams higher, and the average selling weight of 1 head - on 4,1 kg than in the control group. Swine which were fed with the presented mixed fodders with grain extra fine grade showed fewer deviations from the rated value of metabolism (blood serum protein and its fractions, calcium, phosphorus, acid capacity) in comparison with the control groups

Research of possibility of application of sapropel (putrid mud) of the Chervonnoe lake (the Republic of Belarus) in diets of bred and milking sows as one of the ingredients of mixed fodders, as well as the evaluation of its influence of sow development and digestibility of nutritive elements were studied. Application of dry sapropel a source of energy, protein, mineral and vitamin nutritive elements for mixed fodder production rendered the positive influence on sows productive qualities: there was stated the increased number of born piglets on o,5 heads with a higher growing capacity; there was noted the increasing of coefficients of nutritive elements metabolism (crude protein – on 2,7%, crude fat – on 2,9%, free-nitrogen extracts – on 1,3%, and dietary fibre – jn 4,7%) with the simultaneous increasing of nitrogen, calcium, and phosphorous uptake by sows. Nutritional value of the analysed sapropel was 0,23 fodder units and 3,13 MJ of exchange energy per 1 kg of dry matter. Inclusion of 3% sapropel into mixed fodders for pregnant and suckling sows promoted the increasing of quantity of pigs at a birth, body weight of one pig to 3-week age and has ensured young growth with higher energy of growth. Use of sapropel in mixed fodders for sows makes active a metabolism and promotes increase of digestibility of the basic nutrients of a rations

Application of protein, vitamin and mineral supplement in diets of 1-3 months old calves in rate of 5% per weight instead of a part of sunflower cake, containing rape, peas, lupin and vitamid on a basis of halites, phosphite, phosphate, sapropel and a mineral-vitamin preparation in structure of grain forage against winter rations on the basis of rich in herbs hay (5%), milk (68%), mixed fodder (20%), whole grain (7%), and also summer rations with grass and legume mixture (7%), hay (1%), milk (65%), mixed fodder (20%), integral grain (7%) makes it possible to receive daily average weight gain of calves at level 833-867 grams at expenses of forages for 1 centner of weight gain on 3,3-3,4 сentner of forage units. Introduction into rations of the protein, vitamin and mineral supplement on the basis of local protein and mineral raw materials in number of 10% per weight in structure of mixed fodder for calves at the age of 3-6 months old against the background of winter diets with haylage (28%), mixed fodder (64%), molasses (8%), as well as summer diets with grass and legume mixture (30%), mixed fodders (66%), molasses (4%) makes it possible to receive daily average weight gains of calves on 944-967grams at expenses of forages of 4,0-4,1 сentner of forage units. Feeding of 1-6 months old calves with mixed fodders with inclusion of 5-10% of protein, vitamin and mineral supplement per weight with grain high-protein crops against the background of winter and summer diets with a ratio of the deconjugate protein to the non deconjugate one - 65:35 (in control group - 71:29) instead of sunflower cake makes it possible to receive the daily average weight gain at the level of 900-927 grams at expenses of forages 3,7-3,8 сentner per forage unit. Cost of presented mixed fodders decreases on 14%, and the cost price per 1 centner gain - on 7-8%

The immune status of chickens, pigs and calves depends on the content of protective factors in incubatory egg, mother colostrum and timely transfer to their posterity. At young growth in postnatal ontogenesis it is allocated three age immune deficiencies. The first is connected with untimely receipt transovarian and colostoral factors of the protection, the second is caused by an expenditure of passively transferred protective factors of protection and immaturity of own immune system. The third age immune deficiency arises at sharp transfer of young growth into new type of feeding and concerns, first of all, disorders of local protection of a digestive path. Timely application the probiotic enterobifidin, baktril-2, bifidoflorin, developed by Vitebsk State Academy of Veterinary Medicine together with Institute of microbiology of the National Academy of Sciences of Belarus, microbic polysaccharides salmopul and vistimulin, received together with Vitebsk biofactory, and also diamiksan allows to prevent development of immune deficiencies and on their background gastroenteric and respiratory diseases of young growth, to stimulate animal growth and to improve quality of meat production, decrease economic efficiency and ecological safety, considerably allows to reduce application of antimicrobic preparations (antibiotics, Sulfanilamidum, Nitrofuranums, etc.) | Иммунный статус цыплят, поросят и телят зависит от содержания защитных факторов в инкубационном яйце, молозиве матерей и своевременной передаче их потомству. У молодняка в постнатальном онтогенезе выделяется три возрастных иммунных дефицита. Первый связан с несвоевременным поступлением трансовариальных и колостральных факторов защиты, второй обусловлен расходованием пассивно перенесенных защитных факторов защиты и незрелостью собственной иммунной системы. Третий возрастной иммунный дефицит возникает при резком переводе молодняка на новый тип кормления и касается, прежде всего, нарушения местной защиты пищеварительного тракта. Своевременное применение пробиотиков энтеробифидина, бактрила-2, бифидофлорина, разработанных Витебской государственной академией ветеринарной медицины совместно с Институтом микробиологии НАН Беларуси, сальмопула и витстимулина, совместно полученных с Витебской биофабрикой микробных полисахаридов, а также диамиксана позволяет профилактировать развитие иммунных дефицитов и возникающих на их фоне желудочно-кишечных и респираторных болезней молодняка, стимулировать рост животных и улучшать качество мясной продукции, повышать экономическую эффективность и экологическую безопасность, значительно сократить применение противомикробных препаратов (антибиотиков, сульфаниламидов, нитрофуранов и др.)

Determination of the efficiency of young fat stock feeding with wet rolled maize grain which was preserved by means of different preparations was realized in the conditions of the Republic of Belarus. The following preserving agents were applied: HV-2 (by- product of amino-formaldehyde resin); AIV 3 Plus (mixture of 62% formic acid and 24% ammonium formate; KEMIRA, Finland); carbamide (30 kg/t) with 40 g/t of complex mineral supplement. Feeding of young fat stock with rolled maize grains preserved by NV-2 promoted the increasing of nutrient digestibility on 1,5-5,0%, nitrogen use - on 2% in comparison with control. Application of rolled maize grain preserved with AIV-3Plus and carbamide with the complex mineral supplement made it possible to increase the digestibility of nutrients on 1,0-4,8% and nitrogen use - on 1,6-1,7%. Introduction of rolled maize grain preserved with NV-2 into rations of bull calves increased their productivity on 4,7% (P less than 0,05) with the simultaneous lowering of forage expenses on 1,9%. Application rolled maize grains preserved with AIV-3Plus made it possible to increase daily average weight gain on 3,8% and lower the forages expenses on 2,6%. Use preserved with NV-2 and AIV-3Plus rolled maize grains in rations of young fat stock lowered the production cost price on 11,9% and 10,8% that proved the efficiency of the studied fodder

Evaluation of maize (Zea mays) silage prepared in combination with biological preserving agent Laktotim and calculation of its economic efficiency were realized in the conditions of the Republic of Belarus. Application of Laktotim rendered positive influence on forage dry matter content, on nutritive substance safety, and made it possible to increase the organoleptic indicators of silage. Use of the maize silage prepared with the preservative in a cow ration has positively affected their dairy efficiency. Cow milk yields have raised on 4,5%. Application of the preparation for silage making of green maize mass proved to be economically worth. The realized toxicological estimation of biological preserving agent Laktotim did not reveal any signs of preparation toxicity. Introduction of the preparation into mice stomach in a single maximum dose (25000 mg/kg; 12500; 5000 mg/kg of body weight), as well as application of the preparation in mixture with water in ratio which in 100 and 200 times exceeded the standard ratio in plant green mass, did not cause destruction of experimental animals. According to classifications of All-Union State Standard 12.1.007-76, the preparation Laktotim belongs to the4 class of danger - low-hazardous substances (LD50 over 5000 mg/kg)

Nowadays in connection with an interdiction for antibiotics use in animal feeding it is very actual to work out and apply new forms of probiotic preparations which should be as ecologically safe and harmless both to people and animal products. Probiotics make it possible to improve the digestibility of nutritive substances of forages, normalize metabolism, enrich with biologically active substances that promotes the increasing of their productivity. In the Republic of Belarus the probiotics are produced in the obviously insufficient quantity that creates problems of young stock livability. Influence of application of Akozil and Sublicin probiotics in diets of suckling calves on biochemical parameters of blood serum was analysed. It was stated that use of the analysed probiotics made it possible to decrease the level of urea and total cholesterol, to increase of the total protein content in blood serum of the experimental calves. There was noted the increasing of glucose level in blood serum of calves fed with Akozil. There was marked the tendency of more optimal level of calcium and phosphorus in calves having Sublicin in their diets. The obtained results testified the normalization of metabolic processes taking place in calves which were fed by the mentioned above probiotics

In process of animal husbandry intensification much attention should be given to maintenance of the high-grade balanced feed of animals. Forage supplement Profat (Protected Fat) is a protected fat in dry-sand mould with 84% of fat content. Application of 0,5-0,8 kg of dry fat supplement in cows diets per 1 head a day (4,7-10,0% in mixed forage content) promotes the increasing of prime cost of milk yield with basic fatness at 1,8-2,8% within fatness growth at 0,1-0,24% without protein content decrease. During the analysis of morphological and biochemical blood structure there was not established any considerable inter-group distinctions. At the same time, it is necessary to notice, that in blood of animals of two experimental groups there was stated a little bit higher protein content. However, in proportion to application of experimental fat additive up to 0,8 kg per head a day the protein content decreased. The increased number of erythrocytes and hemoglobin content in blood of animal of trial groups proved the strengthening of metabolic processes. In blood of trial groups it was noted high quantity of vitamin A and phosphorus as well as lower amount of calcium

There was realized the estimation of influence of application of biometals in a ration of chickens-broilers of different age on the content in their blood macro-and microelements. It is possible to make the conclusion, that in blood of chickens-broilers the tendency to decrease with the years concentration of calcium and magnesium, to increase of level of phosphorus, zinc and copper, and also increase the content of cobalt with 23-day age to 33-day and its insignificant decrease by 45 day of a life of chickens takes place. At the same time application in a ration of chickens-broilers of biometals sodium-ferrum-ethylenediaminetetraacetate (Na-Fe-etda) from calculation of 2,5 mg/kg, sodium-zinc-ethylenediaminetetraacetate (Na-Zn-etda) - 5,5 mg/kg, sodium-cobalt- ethylenediaminetetraacetate (Na-Co-etda) - 5,5 mg/kg and sodium-cuprum-ethylenediaminetetraacetate (Na-Cu-etda) - 3,5 mg/kg of body weight in the basic weight led to small increase of level macro- and microelements in blood of chickens-broilers and did not render negative influence on safety and a gain of body weight of chickens in trial group. Data on concentration of macro- and microelements in blood and a body weight gain of chickens-broilers are presented. | Целью работы является оценка влияния применения биометаллов в рационе цыплят-бройлеров разного возраста на содержание в их крови макро- и микроэлементов. Можно сделать заключение, что в крови цыплят-бройлеров имеет место тенденция к снижению с возрастом концентрации кальция и магния, повышению уровня фосфора, цинка и меди, а также увеличению содержание кобальта с 23-дненвного возраста к 33-дневному и незначительному снижению его к 45-му дню жизни цыплят. В то же время применение в рационе цыплят-бройлеров биометаллов натрий-ферум-этилендиаминтетраацетат (Na-Fe-etda) из расчета 2,5 мг/кг, натрий-цинк-этилендиаминтетраацетат (Na-Zn-etda) - 5,5 мг/кг, натрий-кобальт-этилендиаминтетраацетат (Na-Co-etda-) - 5,5 мг/кг и натрий-купрум-этилендиаминтетраацетат (Na-Cu-etda) - 3,5 мг/кг живой массы в основной своей массе приводило к небольшому повышению уровня макро- и микроэлементов в крови цыплят-бройлеров и не оказывало негативного воздействия на сохранность и прирост живой массы цыплят опытной группы. Представлены данные по концентрации макро- и микроэлементов в крови и прирост живой массы цыплят-бройлеров.

Appraisement of new mixed fodder formulas for the fattening performance test was realized in the conditions of the Republic of Belarus by the example prevailing in the country Large White breed. Barley (Hordeum vulgare) proved to be one of the main components in swine feeding in Belarus. Forage wheat in mixed fodders for the fattening performance served a basic energy source and contained less dietary fibre than barley, as well as less concentration of antinutrients which interfere with digestion of rations than others crops (rye, triticale). Soybean and sunflower oil meal were included into analysed mixed fodders as the protein sources. Application of new mixed fodder formulas for fattening control realization according to the technical specifications of the Republic of Belarus 600039106.044 - 2007 was realized by the example of gilts of pigs of Large White breed. Research results showed that new studied formulas made it possible to obtain the higher intensity of swine development indices (on 52-72 grams) in comparison with the traditional formulas of mixed fodders (technical specifications of the Republic of Belarus 06093149.065-2000). New mixed fodder recipes did not render harmful effect on health and safety of livestock. At the same time, the analysed recipes of mixed fodders did not authentically influence the carcass indicators (carcass length, fat thickness, loin eye area, ham weight, slaughter yield)