Influence of cellulase or xylanase on the in vitro rumen gas production and fermentation of corn stover

L H VALLEJO; A Z M SALEM; A E KHOLIF; M M Y ELGHANGOUR; R C FAJARDO; N RIVERO; A Z BASTIDA; M D MARIEZCURRENA

doi:10.56093/ijans.v86i1.55025

Authors

L H VALLEJO Universidad Autónoma del Estado de México, Estado de México, México
A Z M SALEM Universidad Autónoma del Estado de México, Estado de México, México
A E KHOLIF National Research Centre, 33 Bohouth St. Dokki, Giza, Egypt
M M Y ELGHANGOUR Universidad Autónoma del Estado de México, Estado de México, México
R C FAJARDO Universidad Autónoma del Estado de México, Estado de México, México
N RIVERO Universidad Autónoma del Estado de México, Estado de México, México
A Z BASTIDA Universidad Autónoma del Estado de México, Estado de México, México
M D MARIEZCURRENA Universidad Autónoma del Estado de México, Estado de México, México

https://doi.org/10.56093/ijans.v86i1.55025

Keywords:

Cellulase, Corn straw, Fibrolytic enzyme, In vitro fermentation, Xylanase

Abstract

In vitro gas production (GP) technique was used to investigate effect of exogenous enzymes cellulase (CEL) or xylanase (XYL) at different doses on in vitro fermentation characteristics of corn stover. Enzymes were supplemented at 0 (control), 10, 20, 40 and 80 µg/g DM. Gas production was determined at 2, 4, 6, 8, 10, 12, 24, 36, 48 and 72 h of incubation. After 72 h, the incubation was stopped and supernatant pH was determined, and filtered to determine dry matter (DMD), neutral detergent fiber (NDFD) and acid detergent fiber (ADFD) degradabilities. Interaction effects occurred for enzyme type and dose for all measured gas parameters with exception of the lag time, DMD, organic matter degradability (OMD), NDFD, metabolizable energy (ME), short chain fatty acids (SCFA) and microbial crude protein (MCP) production. Cellulase and XYL increased GP (P<0.05) at different incubation hours with better results at the dose of 40 µg/g DM. The dose 80 µg XYL/g DM had the lowest GP compared to other doses. In addition, CEL and XYL decreased pH with increasing OMD, ME, SCFA and MCP production at 40 µg/ g DM of corn stover. The present results suggested that the level of CEL and XYL at 40 µg/g DM have higher GP than other levels of enzymes, imply this level can be more effectively to improve rumen fermentation; however, the difference of XYL between treatments and control was less than that of CEL.

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