title: An investigation into the variability of extract viscosity of wheat-relationship with the content of non-starch-polysaccharide fractions and metabolisable energy for broiler chickens.
abstract: The in vitro extract-viscosity and the content of non-starch-polysaccharides were investigated in 34 defined wheat varieties grown at 5 locations each. Both, wheat genotype as well as growing location clearly influenced the viscosity of soluble extract from wheat. Furthermore, the content of non-starch-polysaccharides (soluble/total) and pentosans (soluble/total) were determined in 13 wheat varieties each grown at two locations. Soluble pentosan contents were highly positively correlated with extract viscosity of wheat at the locations Hayn (r = 0.86) and Biendorf (r = 0.90). The classical apparent metabolisable energy of 5 wheat samples having different extract viscosities was assessed. The AMEN values ranged from 14.0 to 14.6 MJ/kg DM and were significant negatively correlated to content of soluble arabinoxylans (r = 0.67) and to the extract viscosity (r = 0.83). Furthermore, the viscosity of jejunal (4.0 to 22.8 mPas) and ileal (13.1 to 78.0 mPas) digesta exhibited a clear relationship with soluble pentosan contents and extract viscosity. Under the conditions applied in this study the technique of extract viscosity measurement can predict the AME.
authors.affiliation: Martin-Luther-Universität Halle-Wittenberg, Institut für Tierernährung und Vorratshaltung, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Dusel
authors.forename: H
authors.initials: H
authors.lastname: Kluge
authors.forename: K
authors.initials: K
authors.lastname: Gläser
authors.forename: O
authors.initials: O
authors.lastname: Simon
authors.forename: G
authors.initials: G
authors.lastname: Hartmann
authors.forename: J
authors.initials: J
authors.lastname: Lengerken
authors.forename: H
authors.initials: H
authors.lastname: Jeroch
mesh_terms: D000704:Analysis of Variance; D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002645:Chickens / Q000378:metabolism* / Q000502:physiology; D004032:Diet / Q000662:veterinary*; D004734:Energy Metabolism / Q000502:physiology*; D005838:Genotype; D005858:Germany; D011134:Polysaccharides / Q000032:analysis* / Q000378:metabolism; D014908:Triticum / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D014783:Viscosity
chemical_list: D011134:Polysaccharides