Fermentation of increasing ratios of grain starch and straw fiber: effects on hydrogen allocation and methanogenesis through in vitro ruminal batch culture.

ABSTRACT: Grain starch has a faster rate of rumen fermentation than straw fiber and causes a rapid increase in ruminal molecular hydrogen (H₂) partial pressure, which may promote other H₂ sinks to compete H₂ away from methanogenesis. The study was designed to investigate the effects of increasing ratios of grain starch to straw fiber on hydrogen allocation and methanogenesis through in vitro ruminal batch incubation. Corn grain and corn straw were employed as starch and fiber source respectively. Seven treatments were the ratios of corn grain to corn straw (RGS) being 0:6, 1:5, 2:4, 3:3, 4:2, 5:1, and 6:0. Elevating RGS increased dry matter (DM) degradation and decreased methane (CH₄) and hydrogen gas (gH₂) production relative to DM degra

SUBMITTER: Yi S 

PROVIDER: S-EPMC10108854 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature