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

Table 5 Correlation between chemical composition and in vitro 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 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
²ns = non-significant (P > 0.05), * = significant (P < 0.05)

ISSN: 2049-1891