Effects of water extracts from chicory and BHT on the in vitro rumen degradation of feeds

Franco Tagliapietra, Mirko Cattani, Matteo Dal Maso, Stefano Schiavon
  • Mirko Cattani
    Affiliation not present
  • Matteo Dal Maso
    Affiliation not present
  • Stefano Schiavon
    Affiliation not present

Abstract

Effects of Butyl-Hydroxyl-Toluene (BHT) and of Red Chicory Extract (RCE) on kinetics of gas production (GP) and rumen degradability values (OMd, NDFd and in vitro true OM degradability - IVTOMD) of two feeds (meadow hay and corn meal) were evaluated using an in vitro automatic batch system. For each feed 2 increasing dosages (0.15 and 1.5 mg/g of feed) of BHT and RCE and a Control (C) were tested in 4 replications and 2 incubations. First incubation lasted 72h, the 2nd one was stopped at the times on which half of GP was produced (t½), which were 9 and 16 h for corn and hay, respectively. From the supernatants of the 2nd incubation, VFA, NH3, N content of the residual NDF were analysed and the microbial N balance was computed. The 2 feeds significantly affected rumen fermentation parameters; BHT significantly increased asymptotic GP, t½ and IVTOMD (P<0.01), decreased the proportion of butyrate (P<0.01) but did not affect microbial N balance; RCE did not influence any of the parameters measured with respect to C, except for a significant increase of the estimated N available for microbes at the higher dosage.

Keywords

Gas production, In vitro rumen degradability, Natural extracts, Antioxidants

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Submitted: 2010-01-11 12:02:34
Published: 2010-01-11 12:02:45
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The Italian Journal of Animal Science [eISSN 1828-051X] is the official journal of the Animal Science and Production Association and it is published by PAGEPress®, Pavia, Italy. Reg. Pavia, n. 2/2010-INF. All credits and honors to PKP for their OJS.
 
 
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