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Research r...WeanersTrial report 1065

Trial report no. 1065: 0.5% benzoic acid can replace copper in feed for weaned pigs

The addition of 0.5% benzoic acid results in the same production value as 1% benzoic acid in combination with 20 ppm copper in feed for weaned pigs. Both levels of benzoic acid result in the same production value as feed containing 150 ppm copper.

Abstract

It is possible to lower the content of copper in feed for weaned pigs to 20-30 ppm provided minimum 0.5% benzoic acid is also added to the feed. This is the outcome of a trial performed at Experimental station Grønhøj.

Results show that the production value of weaned pigs given 1% and 0.5% benzoic acid in combination with a low content of copper (20-30 ppm) did not differ significantly from the pigs fed a conventional diet with a high content of copper (150 ppm). The level of treatments for disease and diarrhoea did not differ regardless of whether the feed contained 1% or 0.5% benzoic acid and was close to that of the pigs given feed with a high content of copper.

The pigs given feed with a low content of copper and no benzoic acid had a lower production value than the pigs fed any of the other diets. The number of treatments for diarrhoea was also higher in this group.

The addition of 0.5% benzoic acid costs roughly DKK 6 per 100 kg feed, whereas an increase in copper from 20 to 150 ppm only costs roughly DKK 1.50 per 100 kg feed.

Updated: 29.01.2016
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