Shorten fungal treatment of lignocellulosic waste with additives to improve rumen degradability

S.J.A. van Kuijk, A.S.M. Sonnenberg, J.J.P. Baars, W.H. Hendriks, J.W. Cone

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic

Abstract

Selective lignin degrading fungi can be used as pre-treatment to make cellulose in plant cell walls accessible for rumen microbes. According to previous studies, Ceriporiopsis subvermispora and Lentinula edodes can increase the in vitro rumen degradability of lignocellulosic biomass in 7 to 8 weeks. To shorten this treatment three additives, urea (1 µg/g or 10 µg/g), manganese (15 µg/g or 150 µg/g) and linoleic acid (0.5 mM or 1 mM), were tested during C. subvermispora or L. edodes treatment of wheat straw and wood chips. After 2 and 4 weeks samples were taken to analyse the in vitro rumen degradability and fibre content. Two weeks of fungal treatment did not increase the in vitro rumen degradability of wheat straw or wood chips and additives did not have an effect on this. Addition of manganese (both concentrations) to C. subvermispora on wood chips did result in more lignin degradation. Linoleic acid (1 mM) and manganese (15 µg/g) enhanced lignin degradation of wood chips by L. edodes after 2 weeks of treatment. Fungal treatment for four weeks increased the in vitro rumen degradability. However additives did not enhance this. Urea and manganese did result in higher lignin degradation after 4 weeks of treatment of wheat straw with C. subvermispora. The cellulose content was not changed during the fungal treatment, without or with either additive.
Original languageEnglish
Title of host publicationProceedings of the 13th European workshop on lignocellulosics and pulp
Pages847-850
Publication statusPublished - 2014
EventEWLP 2014 - 13th European workshop on lignocellulosics and pulp, Seville, Spain -
Duration: 24 Jun 201427 Jun 2014

Workshop

WorkshopEWLP 2014 - 13th European workshop on lignocellulosics and pulp, Seville, Spain
Period24/06/1427/06/14

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