Presents different activities in Denmark with male pigs

Maribo, Hanne

Organic Eprints

Vis hjælpelinjer som er en hjælp ved placering af billeder 1. Højre klik udenfor slidet og vælg ’Gitter og hjælpelinjer’ 2.  Sæt kryds ved ’Vis’ tegnehjælpelinjer på skærmen 3. Vælg ‘OK’ Activities with male pigs  Hanne Maribo Chief Scientist,  hma@lf.dk Feeding pure grain  • Reducing skatole - pure grain 2 days before slaughter – Idea: no tryptophan, no skatole production – Cheap method – Practical method  • Move male pigs to the pick-up facility 2 days fed pure grain • Only male pigs ready for slaughter no negative effect on the rest.  – Relevant for organic pig producers  • Large pens  • Great variations in weight • Deliver pigs over several rounds.   Boar taint – weight and age • Skatole and androstenone at increasing weight and age 1. Biopsies: • 60 to 120 kg neck fat biopsies + blood samples interval 10 kg  • HPLC analyses of skatole, androstenone; biopsies + blood  2. Slaughtered at 80 kg up to 120 kg live weight.  • Biopsies and blood samples - day before slaughter.  • Skatole equivalents and human nose - neck fat samples  • Skatole, indole and androstenone fat and blood HPLC Boar taint active coal Theory: reduction of skatole and androstenone  • 15 male pigs were fed active coal for 2 weeks – 5% in the diet • Biopsies before feeding • Biopsies before slaughter • Fat samples after slaughter Maximal growth &  low boar taint • Increasing growth of male pigs – Increasing the level of protein and amino acids by 15% – Increasing energy in diet by 8% • Reducing boar taint  • Feeding pure grain 3 days before slaughter.  • Two-factorial design.  • Feeding male pigs different fibre sources before slaughter  • Idea: to reduce skatole level. Feeding strategies tested: 1. Control diet (30 pens of 8-9 pigs) 2. 15% chicory 4 days prior to slaughter (30 pens of 8-9 pigs) 3. Pure grain 3 days prior to slaughter (30 pens of 8-9 pigs) 4. 10% Jerusalem artichoke 4 days prior to slaughter (100 pigs) 5. 10% sugar beet pellets 14 days prior to slaughter (100 pigs) 6. 10% palm cake 14 days prior to slaughter (100 pigs) • For the first three treatments, productivity is recorded  – Production economy are calculated. Different fibre sources Jerusalem artichoke  chicory Control diet  Chicory  Grain pellets  Jerusalem artichoke  Sugar beet pellets Palm cake  Concepts in an organic herd  • Management and feeding strategies • Effect on boar taint (skatole and androstenone)  • One herd:  – 250 male pigs are divided into two treatments.  – Group 1: control diet and slaughter weight (115 kg).  – Group 2: reduced weight & grain 2-4 days prior to slaughter.  

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Organic Eprints