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

Table 6 Effects of dietary Fps:Cps and FA supplementation (0 or 24 g/d) on in situ DM degradability

Diets	Low-Fps:Cps		High-Fps:Cps			P-value
FA, g/d	0	24	0	24	SEM	Fps:Cps	FA	Fps:Cps × FA
Concentrate DM, %
a	11.83	13.77	10.18	11.19	2.315	0.715	0.749	0.959
b	91.09	85.21	84.09	84.75	2.491	0.498	0.634	0.551
k, /h	4.95	5.98	6.43	6.01	0.283	0.194	0.586	0.209
ERD	68.16	69.35	67.37	67.74	1.256	0.674	0.781	0.884
Alfalfa hay DM, %
a	16.18	15.00	18.39	15.08	1.647	0.755	0.545	0.773
b	37.95	41.19	41.06	39.04	1.164	0.850	0.808	0.310
k, /h	11.45	11.12	8.54	13.42	1.545	0.927	0.505	0.446
ERD	47.45	48.67	51.26	47.08	0.970	0.560	0.446	0.181

FA fumaric acid, Fps:Cps ratio of forage particle size: concentrate particle size, SEM pooled standard error of the means
a = rapidly degradable fraction, b = slowly degradable fraction, k = constant rate of degradation of fraction b; ERD = effective ruminal degradability

ISSN: 2049-1891