## 3 Results
### The Influence of the Phytases on Body Weight, Weight Gain, Feed Assimilability, and FCR  
The additives obtained were used for the broilers' feeds. Some kinds of additives, namely those which were based on the _Y. lipolytica PO1f_ and _PO1f_ (pUV3-Op) strains grown in the waste-containing medium, were added at a maximum dose of 1.2% w/w. This does not exceed the 3% maximal amount recommended for the mixed feed [24]. The specific phytase activity in the dried PO1f (pUV3-Op) additive was 0.25 FYT/g, so the phytase activity in the experimental group diets was 30 and 15 FYT/kg, i.e., 30-60 times less than the recommended one [6,20,25,26]. The Ladozyme Proxi commercial phytase was applied in doses of 100 and 1000 FYT/kg, which were slightly less than and twice as much as, respectively, the recommended dose by the manufacturer (500 FYT/kg). Table 4 and Figure 1 show the dynamics of the body weight of the broilers in the experimental groups. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & & \multicolumn{4}{c}{**Bird Weight (g)**} \\ \cline{3-7}
**The Number of Measure Day** & \begin{tabular}{c} **The Control** \\ **Group** **(+Control)** \\ \end{tabular} & \begin{tabular}{c} **The Control** \\ **Group** **(–Control)** \\ \end{tabular} & \begin{tabular}{c} **The Control** \\ **Group** **(Encaps)** \\ **Tubrase**, **30 FYT/kg** \\ \end{tabular} & \begin{tabular}{c} **The** ** **The** ** **Experimental** \\ **Group** **(Encaps)** \\ **Tytase**, **15 FYT/kg** \\ \end{tabular} & \
\begin{tabular}{c} **The** **Experimental** \\ **Group**, **100 FYT/kg** \\ \end{tabular} &
\begin{tabular}{c} **Experimental** \\ **Group**, **100 FYT/kg** \\ \end{tabular} \\ \hline
**The 14 th day** & **378.30 \(\pm\) 44.88** & **377.30 \(\pm\) 42.03** & **377.00 \(\pm\) 41.71** & **378.30 \(\pm\) 43.15** & **377.50 \(\pm\) 46.09** & **379.0 \(\pm\) 43.06** \\ \hline Difference with +C, g & 0.00 & \(-1.00\) & \(-1.30\) & 0.00 & \(-0.80\) & \(1.60\) \\ \hline Difference with +C, \% & 0.00\% & \(-0.27\)\% & \(-0.34\)\% & 0.00\% & \(-0.22\)\% & \(0.43\)\% \\ \hline
**The 21 st day** & **950.80 \(\pm\) 15.78 a** & **946.30 \(\pm\) 16.33 a** & **947.40 \(\pm\) 12.42 b** & **945.40 \(\pm\) 9.83 b** & **939.00 \(\pm\) 14.62 c** & **945.90 \(\pm\) 9.86 c** \\ \hline Difference with +C, g & 0.00 & \(-4.50\) & \(-3.30\) & \(-5.40\) & \(-11.80\) & \(-4.90\) \\ \hline Difference with +C, \% & 0.00\% & \(-0.48\)\% & \(-0.34\)\% & \(-0.57\)\% & \(-1.24\)\% & \(-0.51\)\% \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Weight gain data of the broiler chickens during the experiment. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**The Feed Composition** & \ \begin{tabular}{c} **The Component Amount** \\ **(\%)** \\ \end{tabular}  & \begin{tabular}{c} **Phosphorus Amount, \% per 100 g of** \\ **the Feed** \\ \end{tabular}  \\ \cline{3-4}
In addition to the average body weight, the FCR was calculated for each experimental group (Table 5, Figure 2). From the time the experimental groups were assembled until the seventh day of the experiment, the FCRs were nearly equal in value in all the groups and varied between 2.0 and 2.1. Then, the FCR in the negative control group (2.1) gradually grew and reached 2.5 on the 42 nd day and 2.3 on the 45 th day. By contrast, in the positive control group, the FCR decreased and remained around 1.8 throughout the whole experiment. \begin{table}