Effect of six species of white-rot basidiomycetes on the chemical composition and rumen degradability of wheat straw

The Journal of General and Applied Microbiology

Zuzana Cerešnáková²  Dušan Jalc¹  Peter Siroka¹ 

[1] Institute of Animal Physiology, Slovak Academy of Sciences;Research Institute of Animal Production, Hlohovská, Nitra, Slovak Republic

关键词: dry matter digestibility;    fungal treatment;    in vitro;    VFA production;    wheat straw;   

DOI  :  10.2323/jgam.43.133

学科分类：微生物学和免疫学

来源: Applied Microbiology, Molecular and Cellulrar Biosciences Research Foundation

【 摘 要 】

This study was conducted to investigate changes in in vitro dry matter digestibility (IVDMD), volatile fatty acids (VFA) production and cell-wall constituent degradation in wheat straw treated with six white-rot fungi: Daedalea quercina, Hericium clathroides, Phelinus laevigatus, lnonotus andersonii, lnonotus obliquus, and lnonotus dryophilus. The incubation of wheat straw for 30 days at 28°C improved IVDMD from 41.4 (control) to 59.2% for D. quercina, 56.3% for H. clathroides, 50.2% for P. laevigatus, 51.4% for l. andersonii, 52% for l. obliquus, and 55.9% for l. dryophilus. In contrast, the growth of fungi was accompanied by the dry matter loss of wheat straw: 43% for D. quercina, 12% for H. clathroides, and 22-25% for the other fungi. It is evident that the increase in digestibility by D. quercina was not offset by a loss of dry matter. The total VFA production during the rumen fermentation of fungus-treated straw was slightly increased by H. clathroides and l. dryophilus only. Neutral detergent fiber (NDF) and acid detergent fiber (ADF) were reduced in fungus-treated straw. Out of the three fractions (hemicellulose, cellulose, and lignin), hemicellulose and lignin showed the largest proportionate loss after inoculation with the fungi D. quercina, H. clathroides, P. laevigatus, and l. obliquus. The other two fungi showed the largest proportionate loss in cellulose and hemicellulose contents. The results of this study suggest that the digestion enhancement of wheat straw colonized by white-rot fungi is regulated by complex factors including the degradation of structural carbohydrates and lignin.

【 授权许可】

Unknown