Vpliv tanina na učinkovitost delovanja fitaze pri prašičih pitancih = The effect of tannins on phytase efficiency in fattening pigs
Salobir, Janez ...
V poskusu s 36 v presnovne kletke individualno vhlevljenimi prašiči pitanci (65 kg ž. m.) smo v sedemdnevnem bilančnem obdobju s spremljanjem navidezne prebavljivosti in izkoriščanja beljakovin, ...fosforja, kalcija, magnezija, cinka in mangana proučevali vpliv dodatka ekstrakta kostanjevega tanina na učinkovitost delovanja fitaze. Živali so bile razdeljene v pet skupin: F-/T- (brez fitaze, brez tanina), F+/T- (500 U fitaze/kg, brez tanina), F+/T1 (500 U fitaze/kg, 2,2 g tanina/kg) in F+/T3K (500 U fitaze/kg, 4,5 g tanina/kg). Na koncu poskusa smo živalim zaradi določitve koncentracije mineralov odvzeli vzorce krvi. Dodatek fitaze je zmanjšal izločenje P z blatom (p<.05), zmanjšal izločanje Ca s sečem (p<.05), povečal bilanco P in Ca (p<.05), izboljšal izkoristljivost P in Ca (p<.05), povečal koncentracijo P (p<.05) in zmanjšal koncentracijo Ca (p<.05) v serumu; vendar ni imel vpliva (p>.05) na prebavo in izkoriščanje Mg, Zn in Mn. Dodatek tanina je povečal izločanje beljakovin z blatom (p<.05) in zmanjšal prebavljivost beljakovin (p<.05), vendar ni vplival na učinkovitost delovanja fitaze. Rezultati kažejo, da ekstrakt kostanjevega tanina ne vpliva na učinkovitost delovanja fitaze.
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