Možnosti snížení obsahu dusíkatých látek v krmných směsích pro brojlerová kuřata

The aim of the dissertation was to investigate the effect of exogenous protease (EP) in feed mixtures (FM) for broiler chickens with reduced crude protein (CP) content by 4 and 8 % on growth parameters, carcass quality, apparent ileal digestibility of amino acids and protease activity in the jejunum of broiler chickens. At the same time, the effect of EP on the given parameters was investigated at the increased level of rape seed meal (RSM) in FM. The addition of EP to KS with a 4% reduction in CP did not have a statistically significant (P> 0,05) effect on growth, conversion and feed intake, quality of carcass, nor on the apparent ileal digestibility of amino acids and protease activity in jejunum of the broiler chicken. Higher content of RSM in FM with a 4% CP reduction negatively (P 0.05) effect on protease activity in the jejunum of broilers with FM intake with an 8% CP reduction. Higher content of RSM in FM with an 8% CP reduction significantly decreased (P <0.05) apparent ileal digestibility of Pro and significanlty (P