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Table 5 Correlation between chemical composition and in vitro fermentation characteristics of wheat straw

From: The effect of increased atmospheric temperature and CO2 concentration during crop growth on the chemical composition and in vitro rumen fermentation characteristics of wheat straw

Item1 DMD NDFD ADFD NH3-N MCP GP MP Acetate Propionate Butyrate TVFA
DM −0.49 −0.35 −0.39 −0.60 −0.47 −0.60 −0.05 −0.71 −0.43 −0.40 −0.62
P-Value2 ns ns ns * ns * ns * ns ns *
Ash 0.12 0.34 0.31 0.43 0.66 0.21 −0.84 0.41 0.13 0.21 0.33
P-Value ns ns ns ns * ns * ns ns ns ns
EE 0.39 0.07 −0.15 −0.08 −0.15 0.40 −0.60 0.23 0.24 0.07 0.23
P-Value ns ns ns ns ns ns * ns ns ns ns
CP 0.49 0.31 0.31 0.48 0.29 0.47 −0.25 0.60 0.46 0.38 0.57
P-Value ns ns ns ns ns * ns * ns ns ns
NDF −0.52 −0.43 −0.52 −0.53 −0.50 −0.67 −0.30 −0.73 −0.49 −0.44 −0.67
P-Value ns ns ns ns ns * ns * ns ns *
ADF 0.13 −0.45 −0.42 −0.24 −0.27 −0.47 −0.38 −0.35 −0.32 −0.10 −0.33
P-Value ns ns ns ns ns ns ns ns ns ns ns
HC −0.56 0.05 −0.05 −0.25 −0.20 −0.19 −0.04 −0.39 −0.26 −0.43 −0.38
P-Value ns ns ns ns ns ns ns ns ns ns ns
ADL −0.13 −0.67 −0.32 −0.42 −0.35 −0.69 −0.42 −0.46 −0.46 −0.31 −0.54
P-Value ns * ns ns ns * ns ns ns ns ns
  1. 1 DM dry matter; CP crude protein; EE ether extracts; NDFneutral detergent fiber; ADF acid detergent fiber; HC hemicellulose; ADL acid detergent lignin; DMD dry digestibility; NDFD NDF digestibility; ADFD ADF digestibility; GP gas production; MP methane production; VFA volatile fatty acid; NH 3 -N ammonia nitrogen; MCP microbial crude protein
  2. 2ns = non-significant (P > 0.05), * = significant (P < 0.05)