Digestibility of nutrients, feed conversion and living mass gain at adding enzyme compositions based on cellulase and amylase to the compound feed

Abstract

Purpose. Creation of enzyme preparations, composed of amylase and cellulase and their use in rations of fattening pigs, aimed at increasing productive action and digestibility of the main nutrients of feed. Methods. In the process of the research general scientific methods were used: deduction, scientific hypothesis and abstraction. Specific methods were used for the laboratory research: zootechnical analysis, liquid chromatography method, spectrophotometry, titrometry, balance experiments were performed as well. Methods of variation statistics and the program Statistica 7.0 were used to process the obtained experimental data. Results. The best results were revealed in the fourth balance experiment. It was found that in terms of productivity, the consumption of 5 g of cellulase and 1 g of amylase in the main diet, increases the average daily gain of animals by 21.5% (P<0,01) compared to the control. The level of feed conversion increased due to a decrease in the costs of digestible protein by 19.4%, IVF and metabolic energy – by 4.1%. Thus, the coefficients of digestibility of dry matter increased by 6%, organic matter by – 5.7 %, crude protein by – 5.7% (P<0,05), crude fat – by 11.7%, crude fiber – by 32% (P<0,05), nitrogen-free extractives – by 3.3% compared to the control. Conclusions. Based on the increase in productivity and increase in the level of digestibility of feed nutrients, the efficiency and optimal norms of amylase and cellulase-based enzymes introduction have been established. The use of new enzyme supplements for pigs feeding made from domestic raw materials and the study of the effect of enzyme composition in the dosage of 5 g of cellulase and 1 g of amylase per 1 kg of feed on productive, nutritional, clinical, morphological, immunological parameters of pigs requires further study.