Aarhus University Seal / Aarhus Universitets segl

Knud Erik Bach Knudsen

Supplementing enzymes to extruded, soybean based diet improves breakdown of non-starch polysaccharides in rainbow trout (Oncorhynchus mykiss)

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

DOI

  • J Dalsgaard, Section for Aquaculture, The North Sea Research Centre, Technical University of Denmark, DTU Aqua, Hirtshals, Denmark, Danmark
  • Knud Erik Bach Knudsen
  • V Verlhac, Aquaculture Research Group, Animal Nutrition & Health Research – CRNA, DSM Nutritional Products, Saint-Louis Cedex, France, Frankrig
  • K S Ekmann, BioMar A/S, Brande, Denmark, Danmark
  • P.B. Pedersen, Section for Aquaculture, The North Sea Research Centre, Technical University of Denmark, DTU Aqua, Hirtshals, Denmark, Danmark
Plant-based feed ingredients typically contain remnants of dietary fibres [DF; non-starch polysaccharides (NSP) and lignin] that have various antinutritive effects in carnivorous fish. Exogenous enzymes have been shown to improve the apparent digestibility coefficients (ADC) of plant-based diets presumably by assisting in the breakdown of NSP. This study examined the effects on NSP degradation when supplementing β-glucanase, xylanase, protease or a mix of the three enzymes to an extruded, juvenile rainbow trout (Oncorhynchus mykiss) diet containing 344 g kg−1 de-hulled, solvent-extracted soybean meal (SBM). The NSP content in the non-supplemented control diet and in faecal samples from the dietary treatment groups was analysed to determine the recovery/apparent digestibility of cellulose and total non-cellulosic polysaccharide (T-NCP) sugar monomers. The enzymes had significant, positive effects at the pH range and temperature prevailing in the gastrointestinal tract: β-glucanase improved the ADC of mannose, galactose and uronic acids; xylanase and protease improved the ADC of xylose; and protease furthermore improved the ADC of mannose and uronic acids. There were no effects when supplementing all three enzymes together. In conclusion, exogenous enzymes may potentially be applied to fish feed containing SBM, assisting in the breakdown of NSP and alleviating some of the antinutritive effects
OriginalsprogEngelsk
TidsskriftAquaculture Nutrition
Vol/bind22
Nummer2
Sider (fra-til)419-426
ISSN1353-5773
DOI
StatusUdgivet - apr. 2016

Se relationer på Aarhus Universitet Citationsformater

ID: 84576647