Table 2.

Regression outputs of the relationships between dry matter digestibility (DMD) or organic matter digestibility (OMD) and acid detergent fibre (ADF), acid detergent lignin (ADL), mineral ash (ash), crude protein (CP), dry matter (DM) and neutral detergent fibre (NDF)

Metric	Equation	t	DF	P	r 2
ADF	DMD = − 0.12x + 109	–17.3	105	< 0.001	0.74
ADL	DMD = − 0.15x + 70	–4.9	73	< 0.001	0.24
Ash	DMD = − 0.03x + 73	–0.7	57	0.49	0.01
CP	DMD = 0.18x + 40	15.9	153	< 0.001	0.62
DM	DMD = − 0.09x + 87	–5.2	71	< 0.001	0.26
NDF	DMD = − 0.10x + 130	–17.7	146	< 0.001	0.68
ADF	OMD = − 0.12x + 91	–4.8	67	< 0.001	0.26
ADL	OMD = − 0.57x + 96	–17.3	31	< 0.001	0.90
Ash	OMD = − 0.34x + 108	–2.8	12	< 0.05	0.35
CP	OMD = 0.12x + 43	2.6	81	< 0.05	0.06
DM	OMD = − 0.04x + 79	–4.7	30	< 0.001	0.41
NDF	OMD = − 0.09x + 120	–15.3	79	< 0.001	0.75