## 3 Results
### The Influence of the Phytases on Body Weight, Weight Gain, Feed Assimilability, and FCR
\begin{tabular}{l c c c c c c} \hline \hline \multirow{2}{*}{**Day Of The**} & \multicolumn{6}{c}{**Average Body Weight, g**} \\ \cline{2-7}  & **Positive** & **Negative** & **Encaps.** & **Encaps.** & **Ladozyme** & **Ladozyme** \\
**Broiler Life** & **Control** & **Control** & **Phytase** & **Phytase** & **Proxi,** & **Proxi,** \\  & & & **30 FYT/kg** & **15 FYT/kg** & **100 FYT/kg** & **1000 FYT/kg** \\ \hline \multicolumn{7}{c}{**The 14 th day**} \\ \hline Ratio to the negative control, \% & 0.00 & \(-1.00\) & \(-1.30\) & 0.00 & \(-0.80\) & 1.60 \\ \hline Ratio to the positive control, \% & 0.00\% & \(-0.27\%\) & \(-0.34\%\) & 0.00\% & \(-0.22\%\) & 0.43\% \\ \hline \multicolumn{7}{c}{**The 21 st day**} \\ \hline Ratio to the negative control, \% & 0.0 & \(-4.5\) & \(-3.3\) & \(-5.4\) & \(-11.8\) & \(-4.9\) \\ \hline Ratio to the positive control, \% & 0.0\% & \(-0.5\%\) & \(-0.3\%\) & \(-0.6\%\) & \(-1.2\%\) & \(-0.5\%\) \\ \hline \multicolumn{7}{c}{**The 28 th day**} \\ \hline Ratio to the negative control, \% & 0.0 & \(-199.3\) & \(-17.2\) & \(-68.5\) & \(-79.2\) & \(-64.3\) \\ \hline Ratio to the positive control, \% & 0.0\% & \(-12.7\%\) & \(-1.1\%\) & \(-4.4\%\) & \(-5.0\%\) & \(-4.1\%\) \\ \hline \multicolumn{7}{c}{**The 35 th day**} \\ \hline Ratio to the negative control, \% & 0.0 & \(-184.8\) & \(114.5\) & \(-128.8\) & \(-127.4\) & \(-156.5\) \\ \hline Ratio to the positive control, \% & 0.0\% & \(-9.5\%\) & \(5.9\%\) & \(-6.6\%\) & \(-6.5\%\) & \(-8.0\%\) \\ \hline \multicolumn{7}{c}{**The 42 nd day**} \\ \hline Ratio to the negative control, \% & 0.0 & \(-557.7\) & \(23.1\) & \(-321.7\) & \(-415.7\) & \(-450.7\) \\ \hline Ratio to the positive control, \% & 0.0\% & \(-20.1\%\) & 0.83\% & \(-11.6\%\) & \(-15.0\%\) & \(-16.3\%\) \\ \hline \hline \end{tabular}   
The Impact of the Phytases on Residual Phosphorus and Macro- and Microelements in the Broilers' Faces  
Decreasing P\({}_{1}\) leakage into ground water is often declared as a substantial reason for the ubiquitous application of phytases, particularly in the Netherlands and other countries of the European Union [27,28]. However, data about the impact of feed phytases on the contents of phosphorus in faeces of productive animals are rare in recent publications. We carried out a regular analysis of the element composition in the diets of all groups and in their faeces. The faeces were collected at the beginning (7 th day of the experiment) and at the end of the experiment (28 th day of the experiment). About 200 g of faeces was collected from a cage of each broiler group; they were homogenised and dried in air for several days. Then, \(\sim\)15 g samples were dried in a thermostat at +60 \({}^{\circ}\)C; the \(\sim\)10 g samples were picked up and thoroughly ground in a porcelain mortar with a porcelain pestle. Tablets were formed and used for automated determination of macro- and microelement contents in the samples. Table 6 shows that using the encapsulated OPP led to the reduction of residual phosphorus by 1.7 times on the 7 th day and by 2.1 times on the 28 th day of the experiment compared to the negative control. By contrast, using the conventional Ladozyme Proxi phytase led to a 1.5-fold increase in residual phosphorus in the faeces on the 7 th and 28 th days of the experiment compared to the negative control. Moreover, the residual phosphorus level in the faeces of the group that received encapsulated OPP at 30 FYT/kg was lower by 1.9 and 2.1 times on the 7 th and 28 th day of the experiment, respectively, than that in the positive control group. The data provide irrefutable proof of the best physiological effect of the encapsulated OPP occurring at a dose of 30 FYT/kg compared to the conventional phytase, even at a dose of 1000 FYT/kg. Figure 2: Feed conversion ratio (FCR) of the broilers in the experimental groups. a—\(p\geq\) 0.05; b—\(p\geq\) 0.02; c—did not differ significantly.