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We considered the question of demand parameters correspondence in feedstuff nutrition of separate groups of animals to parameters of feedstuff nutrition and possibility of their determination in feedstuff. For comparison we chose methods of determination of feedstuff chemical composition during zootechnic analysis, actual data of feedstuff nutrition on a database and estimate indicators of feedstuff chemical composition. Under factory conditions it is practically impossible to make full zootechnic feed analysis of diet according to specified parameters on grounds of analysis cost, laboratory opportunities and time conditions. Indirect methods of feedstuff nutrition index obtainment from data base and calculation with the help of regression were developed. However from database it is not always possible to get comprehensive information. There is not enough information in database on content in feedstuff microelements, vitamins, ADF, NDF, starch, sugar, etc. For calculation of feedstuff nutrition formulae were used in indirect method. They fully provide calculations of energetic partially protein feedstuff nutrition, but also calculations of separate parameters of carbohydrate nutrition. For calculation of mineral and vitamin and specific parameters of lipidic and carbohydrate nutrition there are no certain calculation formula. Consequently, along with advance of analysis methods of feedstuff chemical composition, it is necessary to broaden and deepen databases of feedstuff and continue research to establish mathematical models for calculations of feedstuff chemical composition . These developments will allow significantly speeding up calculations of diets, reducing costs and time on feedstuff analysis.

INDIRECT METHODS OF NUTRIENTS DETERMINATION IN FEED STUFF FOR DIARY CATTLE, SHEEP AND PIGS