The degradability characteristics of fifty-four roughages and roughage neutral-detergent fibres as described by in vitro gas production and their relationship to voluntary feed intake

The British Journal of Nutrition
M Blümmel, K Becker

Abstract

Fifty-four roughages of known voluntary dry-matter intakes (DMI; range 7.8-35.2 g/kg live weight per d) were examined in vitro in a gas production test. Samples (200 mg) of roughage and roughage neutral-detergent fibre (NDF) respectively were incubated in a mixed suspension of rumen contents for 96 h and the gas volumes recorded after 4, 6, 8, 12, 24, 30, 36, 48, 54, 60 and 96 h. The kinetics of gas production were derived from the volume recordings described by the exponential equation Y = A + B(l-e-ct) where A is the intercept and ideally reflects the fermentation of the soluble and readily available fraction of the feed, B describes the fermentation of the insoluble (but with time fermentable) fraction and c the fractional rate at which B is fermented per h; A + B describes total fermentation. In vitro true dry matter (TD) and NDF degradabilities (NDF-D) after 24 h incubation were also determined. Of the variation in DMI, 75% was accounted for by the in vitro gas production parameters A, B and c in stepwise multiple regressions; 82% of the variation in DMI was explained by the parameters (ANDF + BNDF) and cNDF as obtained from the incubation of roughage NDF. The rate constants (c) were less important than parameters related ...Continue Reading

Citations

Jul 23, 2011·Archives of Animal Nutrition·Sobhy Mohamed Abdallah SallamAdibe Luiz Abdalla
Apr 30, 2015·Tropical Animal Health and Production·Mupenzi MutimuraIgnatius Verla Nsahlai
Nov 30, 2016·Journal of Animal Science·M K PetersenA J Roberts
Apr 1, 2010·Journal of the Science of Food and Agriculture·Rafael A PalladinoGustavo Jaurena
Feb 14, 2002·Journal of Psychosomatic Obstetrics and Gynaecology·H L Melender, S Lauri
Aug 20, 2019·Environmental Science and Pollution Research International·Hani M El-Zaiat, Adibe L Abdalla
Jun 3, 2021·Animals : an Open Access Journal From MDPI·Karen A PeñaililloEmilio M Ungerfeld

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