Abstrakt
The aim of this study was to analyze whether and to what extent the addition of enzymes hydrolyzing fractions of non-starch polysaccharides or degrading phytates in pigs feeding in the complete cycle (pregnant and lactating sows, piglets and fatteners) may affect the utilization of mineral elements. The study with pigs in the complete reproductive cycle was accomplished in five periods: pregnant sows, nursing sows, piglets, young fatteners, and fatteners. Four experimental groups were established in the experiment, including two controls: positive control (PC), where dicalcium phosphate additive was used as a source of phosphorus, and negative control (NC), where solely plant-based feed mixtures were the source of phosphorus. The other two groups were as follows: MP – in which pigs received the same feed mixture as in the NC group but supplemented with microbial phytase, and the EP group in which the animals were fed the same feed mixture as in the NC group but with the addition of a multi-enzyme preparation which included both microbial phytase and enzymes participating in the hydrolysis of nonstarch polysaccharide fractions (xylanase, β-glucanase, cellulase). The addition of microbial phytase either alone or with the enzymes hydrolyzing the non-starch polysaccharide fractions contributed to increased contents of phosphorus, copper and zinc in sows’ milk. In contrast, it did not evoke any significant changes in the content of calcium, magnesium, iron, or in that of protein, fat and lactose in the milk of sows. The feed enzymes contributed to a significant increase in the concentrations of minerals (except for magnesium) in blood plasma of piglets and fatteners, whereas so significant changes were observed in the blood plasma of sows.
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