Please note that some reports have been translated in their entirety, while for others only the abstract has been translated. Either way, a PDF version of the text will be available for download.
Screenings of entire males from 9 herds showed a rejection rate of 2.3% when based on skatole increasing to 11% when based on human nose score. 37% had an androstenone level above 1.0 ppm.
The largest profit from production of entire males vs castrates was found when the pigs were fed dry feed ad lib. FCR improved by 0.24 and 0.14 FUgp/kg, lean meat % by 1.3 and 1.2 percentage points, but only a small effect was seen on daily gain.
The addition of Econase XT to finisher feed with either wheat or rye as primary grain ingredient did not improve FCR.
Rejection rates due to boar taint are high among organic entire males and vary greatly between herds. Research showed that if rejection was based on skatole, 18% were rejected, and if also based on “Human nose” 26% were rejected.
Lean meat percentage increased when CLA was added to finisher feed, but FCR did not improve. CLA is currently too expensive to add to finisher feed.
The addition of Fresta®F Plus to finisher feed did not significantly reduce ammonia emissions, and no differences were found on pH in slurry.
15% chicory from 2 wks pre-slaughter reduced skatole in intestines and fat tissue, boar taint in fat tissue and meat, and boar flavour in meat, but did not affect androstenone and boar flavour in fat. Chicory alone cannot eliminate boar taint.
All tested phytase and xylanase products had a high heat stability with the exception of Porzyme 9302.
Finishers given 0.5% Lutalin had a 12% higher PV than the control pigs. The greatest effect was seen among castrates that had a higher lean meat % and FCR. Fat quality improved as iodine number increased by 7 units.
When added to finisher feed mixed on-farm, the xylanase product Bergazym P did not improve the production value compared with the control group.
With tuber feeders and pelleted feed, a small positive effect on lean meat % was achieved for both genders by shutting off the water in the feeders at 60 kg.
Several factors increase the risk of poor FCR on finisher farms; grower facility, respiratory disorders, continuous management, liquid feed, feed mixed on-farm or many unthriving pigs.
- 25-hydroxy vitamin D3 as an alternative to the traditional vitamin D3 source
The production value of finishers fed via tube feeders was better with pelleted feed than with home-mixed feed and purchased meal feed. The difference was smaller than previously seen with dry feeders without water.
The standard of 7.4 g st.dig. lysine per FUgp is maintained, while the standard for threonine is increased to 4.9 g st.dig. threonine per FUgp. The trial comprised 5,580 finishers.
– effect on productivity, prevalence of Salmonella and on microbial and physico/chemical conditions in the gastro-intestinal tract
Test of Salocin, Sangrovit, ToyoCerin and Acid Lac for finishers.
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