Effect of addition microbial phytase on growing and fattening pigs performance

Radka Nedeva, Danail Kanev, Sonya Ivanova

Abstract: Five experiments with a total number of 140 growing pigs and three experiments with a total number of 112 fattening pigs were carried out in Agricultural institute – Shumen. The type of microbial phytase used were Natuphos or Ronozyme, in separate experiments. The purpose of the study was to investigate the influence of on average daily gain and feed conversion ratio in growing and fattening pigs by factorial analyses. The influence of the microbial phytase according to different levels of available phosphorus in feed was also determined. The results show that increasing the level of available phosphorus from 1.23 g to 2.60–2.87 g per day by adding microbial phytase has a positive effect (P < 0.001) on the growth and feed conversion ratio in growing pigs. Adding of phytase to compound feed for fattening pigs does not have an effect on the performance. The added microbial phytase and the rate of metabolic processes in the animal body have influenced the level of alkaline phosphatase in the blood of fattened pigs.

Keywords: alkaline phosphatase; fattening pigs; feed conversion ratio; gain; growing pigs; phytase

Date published: 2018-10-04