Effect of enzymes on performances of broiler chickens

Abstract

Objective of this research was to investigate the effect of addition of enzyme complex to diets of different nutritive value on performance of broiler chickens. In this trial 1200 chickens of Cobb 500 hybrid divided into 4 treatments with 8 repetitions were used: 1. Positive control; 2. Positive control with addition of 0,02% of enzyme complex; 3. Negative control (contains 0,3 MJ of energy, 0,1% of accessible P and 0,1% Ca less compared to group 1); 4. Negative control with addition of 0,02% of enzyme complex. Application of enzyme preparation resulted in positive effects on gain and feed conversion, regardless if it was added to standard mixtures or mixtures of diminished nutritive value. Economical analysis of obtained results showed that improvement realized by application of enzyme preparation exceeds costs of its application.Cilj ovog istrazivanja je bio da ispita efekat dodavanja kompleksa enzima u smese razlicite nutritivne vrednosti na performanse brojlerskih pilica. U ogled je ukljuceno 1200 pilica hibrida Cobb 500 koji su rasporedjeni u 4 tretmana sa 8 ponavljanja: 1. Pozitivna kontrola 2. Pozitivna kontrola uz dodatak 0,02% enzimskog kompleksa 3. Negativna kontrola (sadrzi 0,3 MJ energije, 0,1% usvojivog P i 0,1% Ca manje u odnosu na grupu 1) 4. Negativna kontrola uz dodatak 0,02% enzimskog kompleksa. Primenom enzimskog preparata ostvareni su pozitivni efekti na prirast i konverziju hrane, bilo da se on dodaje u standardne smese ili u smese smanjene nutritivne vrednosti. Ekonomska analiza dobijenih rezultata je pokazala da poboljsanja koja enzimski preparat donosi prevazilaze troskove njegove primene.