Methanogen Diversity in Indigenous and Introduced Ruminant Species on the Tibetan Plateau

Table 2

Rumen total SCFA concentration (mM) and proportions (mol 100⁻¹ mol) in ruminant species.

	Yak	Cattle	Crossbreed sheep	Tibetan sheep	SE
Total SCFA	83.24	58.29	82.73	69.75	3.51
Acetate	71.95	73.38	74.15	74.60	0.38
Propionate	14.50	12.28	15.02	12.97	0.35
Isobutyrate	1.05	1.35	0.98	1.05	0.08
Butyrate	11.16	12.06	9.04	10.21	0.42
Isovalerate	1.28	0.79	0.81	1.17	0.09
Valerate	0.063	0.150	0.000	0.000	0.038
Acetate : propionate	4.98	5.97	4.94	5.76	0.15

Mean values within a row with a different superscript are significantly different ().
SE: standard error.