Influence of xylanase and glucanase addition on the quantitative parameters of egg production and feed consumption in the nutrition of laying hens | Vplyv doplnku xylanázy a glukanázy na kvantitatívne parametre znášky a potrebu krmiva vo výžive nosníc

This study investigated the effect of two non-starch polysaccharide hydrolyzing enzymes (xylanase, glucanase) on parameters of egg production and feed consumption in laying hens Isa Brown. The experiment was realized as a two groups trial in 6 replications. The birds were divided into two groups with 540 layers in each and were housed in cage technology. The birds were fed a feed mixture based on wheat, barley and rye with xylanase and glucanase enzymes in the trial group, and without enzymes in the control one. The test carried out within 11 months and was divided into three phases: the first period from 22nd to 28th week, the second from 29th to 46th and the third from 47th to 68th week of age of laying hens. The enzyme product was incorporated to the feed mixtures in content 0.08 g per kg of endo-1.4-beta-xylanase (626 TXU per kg) and endo-1.4-beta-glucanase (235 TGU per kg) during the first and second phase, and 0.09 g per kg of endo-1.4-beta-xylanase (704 TXU per kg) and endo-1.4-beta-glucanase (265 TGU per kg) during the third phase of egg production and feed consumption. Enzymes had the highest effect in the first phase with a statistical significance, when egg production increased of about 2.63% (P less than 0.05) and egg weight of about 3.55 (P less than 0.05). In this period the improvement in all evaluated parameters of production was reported. Feed consumption per egg was also reduced of 3.46% (P less than 0.01) and feed consumption per 1 kg of egg weight of 4.26 % (P less than 0.001). Live weight of laying hens was significantly higher of about 3.62% (2. phase), 3.04% (3. phase) (P less than 0.001). This positive effect was observed during the next two phases, when we observed statistically lower feed consumption per production of 1 kg egg mass of 1.60% (2.) (P less than 0.01) and of 2.81% (3.) (P less than 0.05). The addition of enzymes in laying hens nutrition, reducing feed intake and increasing average value of egg weight, positively effected also the benefit of the production of table eggs.