SUMMARY

Z. Nakev, R. Nedeva, J. Marchev, E. Gineva*, N. Palova**

Agricultural Institute – Shumen

*Еxperimental station of agriculture – Jambol

**Еxperimental station of agriculture – Sredets

There are a number of studies that include possibilities of using alternative sources in pig nutrition in recent years. They present feed rich in crude fiber, which is still in limited use.

Studies by Valchev, 1996; Valchev and Van Beek, 1999; Fortin et al., 2003; Bekker et al., 1998; Swiatkiewicz et al., 2013 show that the addition of enzyme-based products in the compound feed, with high fiber content, improve the growth and utilization of feed and nutrients. Flis et al. (2005) report that with the addition of 97% peeled oats and β-glucanase to the feed in growing pigs, the energy digestibility is improved.

The aim of the study is to determine the influence of VEMOZYME supplementation in compound feeds with high fiber content on carcass characteristics of fattening pigs.

The Agricultural Institute in Shumen carried out a scientific and economic experiment with 20 fattening pigs from the Danube White Breed, divided into 2 groups, with 10 pigs in each group. The experiment started at 34.0-35.0 kg live weight and finished at 107.7-108.6 kg live weight. The experiment was carried out in two periods – the first from 34.0-35.0 kg live weight to 57.5-58.9 live weight and the second – from 57.5-58.9 kg till 107.7-108.6 kg live weight.

It was established that including VEMOZYME in compound feeds (containing 6.1%-6.6% crude fiber during the first and second periods, respectively) for fattening pigs of the Danube White breed, at inclusion rates of 0.1% and 0.05%, did not influence slaughter indexes, carcass composition, or the quality of meat (M. longissimus dorsi).

The addition of enzyme-based products like VEMOZYME in pig fattening systems allows for the successful use of alternative feeds with higher fiber content, without causing negative effects on carcass characteristics or meat quality.