Application of nylon bag technics to determine nutrient value of pig feeds
1990
Tossenberger, J. | Henics, Z. | Gombos, S. (Pannon Agrartudomanyi Egyetem, Kaposvar (Hungary). Elettani es Takarmanyozastani Intezet)
Stomach and duodenum canules were placed operatively into 40-80 kg weight /paternal half sib/ barrows. The experiments were carried out in prefeeding and main phases. The prefeeding phase lasted 9 days. During this period the animals consumed a feed mixture with a nutrient value adequate to their living masses. The provision of the experimental feeds started after the 9th day, so that 1-1 g of the prepared samples were measured into coded bags made from Nytrel stuff of 25-40 mm size, with 53 mesh, and then melded. The prepared bags were introduced into the stomach through the canule for 2.5 hours. After predigestion the samples removed from the stomach were placed hourly into the digestive tract. The chemical composition, the calculated and gross energy and amino acid content were evaluated. More precise digestion data was thus obtained, with the nylon bag technics, than with the conventional method.
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