Cikorie er egnet men endnu for dyrt til svin

Tørret cikorierod kan reducere ornelugten hos hangrise og mindske generne ved parasitter, men dansk dyrket cikorie er i øjeblikket for dyrt for de økologiske svineproducenter. Det viser beregninger i forbindelse med dyrkningsforsøg

Androstenon-indol-skatol-protokol

Beskrivelse af metode til kvantitativt at bestemme indholdet af androstenon, indol samt skatol i spækprøver

Økologisk Svineproduktion 2014 - Uden Kastration

Formålet er at udvikle et helhedsorienteret management-koncept for fremtidens økologiske svineproduktion uden kastrerin

Effect of chicory root and age on the gastrointestinal ecosystem and accumulation of skatole and androstenone in back-fat of male and female pigs

Effect of chicory root and age on the gastrointestinal ecosystem and accumulatin of skatole and androstenone in back-fat of male and female pigs

Screening af hangrise - meddelelse nr. 996

En screening af 9 hangrisebesætninger viste, at frasorteringsprocenten alene baseret på skatoltallet var 2,3%. En sortering på baggrund af human nose gav 11% frasorterede, og der var 37% af hangrisene, der lå over 1.0 ppm androstenon

Hangrise lugter mere end forventet

Økologiske hangrise vokser godt, men mange har et højt niveau af stoffer, der giver ornelugt

A bioreactor system to study survival of Salmonella typhimurium in pig gut content

The batch culture system included six bioreactors. Three bioreactors containing stomach slurry were maintained at pH 4,5 and 6 respectively. Bioreactors containing small intestine slurry were maintained at pH 5,6 and 7 respectively. The bioreactors were inoculated with 10 ml of viable Salmonella. The bioreactors were maintained for 6 hours. Samples of 10 ml were taken at 0 time and at 1 ,2,4 and 6 hours. The samples were analysed for the presence of Salmonella and SCF A. In the stomach samples Salmonella numbers increased at pH 6 but fell at pH 4. In the small intestine sample Salmonella numbers increased at pH 6 and 7. In terms of SCFA production, in the stomach, with samples at pH 6 there was little change in the amounts of lactate, succinate and formate to that detected at 0 time, however levels of acetate did increase slightly. In the small intestine samples levels of succinate and formate increased slightly up to 4 hours, levels of acetate increased significantly from 0 to 6 hours. In terms of the specific growth rates of the individual strains, both strains grew at pH 6 in the stomach content and to a greater extent in the small intestinal content. A bactericidal effect was observed at pH 4 in the stomach content while neither killing nor growth occurred at pH 5 either in the stomach or the small intestine content. Both strains grew well in the small intestine content at pH 7, showing generation times of up to 24 min

Effect of meal feed and coarser grinding of pelleted feed on productivity, microbiology, and physico-chemical properties in the gastro-intestinal tract of finishers

The effects of meal feed and coarser grinding of pelleted feed on the gastro-intestinal health and productivity of finishers were studied. The study comprised a total of 1.044 pigs and was designed as a randomised block test with six test groups and 17 replicates. Several tests have shown that meal feed may reduce Salmonella prevalence in infected herds. This test shows that very coarsely ground pellets and a diet in which the grain part consisted of barley and very coarsely ground wheat (I: I) and added formic acid resulted in the same changes in the physico-chemical properties as did meal feed. In particular the feed added formic acid affected the microbial composition in the gastro-intestinal tract as did meal feed. It is assumed that these two diets will also be able to reduce Salmonella prevalence in finishers without reducing the production value in the same way as meal feed

Effect of wheat bran and wheat : barley ratio in pelleted feed on Salmonella prevalence and productivity of finishers

The effect on the prevalence of Salmonella and productivity of diets with varying wheat: barley ratios and with added wheat bran for finishers (30-100 kg live weight) was studied in one herd. The diets were provided as expanded and pelleted feed and fed to six groups with 384 pigs/group divided into 24 replicates. The proportion of wheat: barley was: Group I: I 00:0, group 2: 75:25, group 3: 50:50, group 4: 25:75, group 5: 0:100. Group 6 contained 85% wheat and 15% wheat bran. The pigs were fed ad libitum as dry feed