Effects of quebracho tannin extract (Schinopsis balansae) and activated charcoal on feed intake and digestibility by goats and their faecal microbial biomass

Faecal microorganisms directly influence autochthonous soil microbial biomass, microbial residues and subsequent soil C and N cycling. This study investigated the effects of feeding activated charcoal (AC) and quebracho tannin extract (QTE) on feed and nutrient intake, apparent nutrient digestibilit...

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Bibliographic Details
Published in:Biological agriculture & horticulture 2016-07, Vol.32 (3), p.159-169
Main Authors: Al-Kindi, Amal, Schlecht, Eva, Schiborra, Anne, Joergensen, Rainer Georg
Format: Article
Language:English
Subjects:
Charcoal
ergosterol
glucosamine
goat faeces
muramic acid
tannins
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Summary:Faecal microorganisms directly influence autochthonous soil microbial biomass, microbial residues and subsequent soil C and N cycling. This study investigated the effects of feeding activated charcoal (AC) and quebracho tannin extract (QTE) on feed and nutrient intake, apparent nutrient digestibility and faecal excretion of C, N and fibre fractions in growing male goats, and on faecal microbial biomass. The completely randomised feeding trial comprised of three subsequent periods with 12 male Boer goats (age 4.8 ± 0.59 months, weight 28 ± 3.9 kg) assigned to five treatments and a control. Experimental diets contained 2 and 4% QTE (QTE2, QTE4), 1.5 and 3.0% AC (AC1.5, AC3.0) and a mixture of 2% QTE plus 1.5% AC (QTEAC). Faecal microbial biomass was measured using ergosterol and amino sugars as indices for fungi and bacteria. There were no significant effects of QTE and AC on intake of feed and nutrients. Faecal concentration of slowly decomposable carbohydrates increased with QTE as well as with AC feeding (p 
ISSN:0144-8765
2165-0616
DOI:10.1080/01448765.2015.1108869