Table 7.

Correlations coefficients of methane traits with rumen fermentation parameters

Traits1	pH	Total SCFA, mM	Acetate, %	Propionate, %	Butyrate, %	A:P	H
DME	0.09	0.19*	−0.08	−0.23**	0.25***	0.07	0.20**
DCE	0.05	−0.01	0.04	0.03	−0.09	−0.10	−0.03
RME	0.08	0.19*	−0.08	−0.25***	0.34***	0.18*	0.22**
RMECO2	0.09	0.24**	−0.10	−0.36***	0.41***	0.22**	0.24**
MY	0.08	0.20**	−0.19*	−0.18*	0.37***	0.09	0.23**
MI	0.05	0.28***	−0.18*	−0.18*	0.30***	0.06	0.28***
MADG	0.05	0.12	−0.08	−0.26***	0.24**	0.27***	0.16*

¹DME, daily methane emissions; DCE, daily carbon dioxide emissions; RME, residual methane emissions; RME_CO2, residual methane emissions calculated with carbon dioxide; MY, methane yield; MI, methane intensity; MADG, methane emissions per kg of ADG; A:P, acetate to propionate ratio; H, theoretical H production.

*P < 0.05.

**P < 0.01.

***P < 0.001.