Effects of fumaric acid supplementation on methane production and rumen fermentation in goats fed diets varying in forage and concentrate particle size

Table 4 Effects of dietary Fps:Cps and FA supplementation (0 or 24 g/d) on CH₄ emissions and ruminal fermentation parameters

Items	Low-Fps:Cps		High-Fps:Cps			P-value
FA, g/d	0	24	0	24	SEM	Fps:Cps	FA	(Fps:Cps) × FA
CH₄, L/d	23.14	15.80	22.84	18.75	1.245	0.552	0.021	0.466
CH₄/DMI, L/kg	21.03	14.54	20.94	17.95	1.044	0.365	0.020	0.341
pH	6.38	6.52	6.40	6.51	0.027	0.887	0.020	0.817
Total VFA, mmol/L	89.19	85.89	87.01	80.53	1.326	0.633	< 0.001	0.187
Individual VFA molar proportion, %
Acetate	70.24	65.50	66.93	63.50	0.526	0.009	< 0.001	0.518
Propionate	14.80	20.58	19.07	21.98	0.437	0.001	< 0.001	0.074
Butyrate	11.93^a	10.79^b	10.82^b	11.20^ab	0.170	0.303	0.259	0.026
A:P	4.89^a	3.62^b	3.74^b	3.15^c	0.095	< 0.001	< 0.001	0.048

FA fumaric acid, Fps:Cps ratio of forage particle size: concentrate particle size, A: P Acetate: propionate, SEM pooled standard error of the means
^a,bDifferent letters in the same row means significant differences (P < 0.05)

ISSN: 2049-1891