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The Effect of Extrusion Conditions on the Fermentability of Wheat Straw and Corn Silage
Author(s) -
Williams Barbara A,
van der Poel Antonius F B,
Boer Huug,
Tamminga Seerp
Publication year - 1997
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/(sici)1097-0010(199705)74:1<117::aid-jsfa777>3.0.co;2-f
Subject(s) - silage , extrusion , straw , fermentation , agronomy , food science , chemistry , extrusion cooking , zea mays , zoology , biology , materials science , composite material
Wheat ( Triticum aestivum L) straw and corn ( Zea mays L) silage were extruded under variable conditions of temperature and screw speed. The resulting extrudates were then tested for their fermentability according to cumulative production of gas, and compared with each other and with the untreated material. VFA analysis was carried out at the end of fermentation, to assess the pattern of fermentation. Analysis of the cumulative gas curves showed significant differences between substrates. Extrusion treatment also led to significant differences, though the effect of screw speed and temperature were not always consistent. However, most differences in cumulative gas production were negative, particularly for wheat straw, which suggests that, under the conditions used, extrusion actually reduced the fermentability of the fibres. © 1997 SCI.