The Effect of Extrusion Conditions on the Fermentability of Wheat Straw and Corn Silage

✍ Scribed by Williams, Barbara A; van der Poel, Antonius F B; Boer, Huug; Tamminga, Seerp

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 320 KB
• Volume: 74
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199705)74:1<117::aid-jsfa777>3.0.co;2-f

✦ Synopsis

Wheat (T riticum 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 signiÐcant di †erences between substrates. Extrusion treatment also led to signiÐcant di †erences, though the e †ect of screw speed and temperature were not always consistent. However, most di †erences in cumulative gas production were negative, particularly for wheat straw, which suggests that, under the conditions used, extrusion actually reduced the fermentability of the Ðbres.