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Physiological feed evaluation for pigs in Organic farming
Project
Project code: 02OE209
Contract period: 01.06.2002
- 31.05.2004
Budget: 104,789 Euro
Purpose of research: Applied research
Samples of organically or conventionally grown cultivars of wheat, barley and faba beans were analysed for nutrient contents. Organically grown cereals contained less crude protein and more starch and fiber. Similar results were obtained for field beans, however, starch was reduced in organically grown beans. Metabolic trials were conducted with pigs of the old landrace breeds 'Schwäbisch Hällisch' (SH), 'Bunte Bentheimer' (BB) and modern crossbreed (CB), each supplied with a basal ration and a supplemental ration (+dried sugar beet pulp). The basal ration supplied 80% of the energy and 100% of the amino acid requirements for daily gains of 700g. The energy deficit was intended to be covered by the supplemental sugar beet pulp. At the end of the metabolic trial pigs were slaughtered, the cecal fermentation intensity was determined and samples of the mucosa of mid jejunum and colon were taken for measurements in digestive and transport physiology (Ussing-chamber-procedure). The supplemental fiber of soluble non starch polysaccharides was higly digestible and caused reduced digestibilities of all the other nutrients. N-excretion via urin was reduced and that via feces increased. CB retained more nitrogen than SH and BB. The cecal fermentation intensity was elevated in pigs fed the fibrous supplemental rations. The pig breeds differed in their potential for fiber digestion. SH digested the lowest amounts of fiber. Observed data on mucosal transport physiology indicate differences in preceacal digestive processes between the pig breeds. In conclusion and contrary to expectation, old landrace pig breeds can not be assumed to possess a higher potential for the more fibrous feed rations in organic farming.
Section overview
Subjects
- Animal nutrition
- Organic Farming
Framework programme
Federal Organic Farming Scheme and other forms of sustainable agriculture (BÖLN)
