Lovastatin-Enriched Rice Straw Enhances Biomass Quality and Suppresses Ruminal Methanogenesis

Table 2

Effect of fermented rice extract (FRSE) on in vitro gas, methane and hydrogen production and rate of gas production.

Gas production (mL)	Ethanol (control)	FRSE (10 mg)	FRSE (20 mg)	Significant
2 h	2.7±0.4	2.8±0.5	3.0±0.3	NS
4 h	4.7±0.7	4.9±0.8	5.3±0.4	NS
8 h	6.9±0.9	6.8±1.1	7.3±0.5	NS
12 h	12.8 ± 1.0^a	11.0 ± 1.3^b	11.2 ± 0.3^b	*
24 h	38.6 ± 2.1^a	31.8 ± 1.4^b	28.7 ± 0.9^c	**
36 h	58.3 ± 2.1^a	53.0 ± 1.4^b	46.5 ± 2.8^c	**
48 h	74.4 ± 2.1^a	71.0 ± 2.0^b	66.6 ± 1.3^c	**
Methane production
%	21.76 ± 1.16^a	19.47 ± 1.50^b	17.55 ± 0.80^c	**
μM	723.21 ± 52.56^a	616.62 ± 41.38^b	521.65 ± 25.21^c	**
Hydrogen production
%	5.65±0.88	5.33±0.80	4.79±1.21	NS
μM	187.22±9.189	153.46±11.255	154.72±12.996	NS
Rate of GP (mL/h)	1.55 ± 0.04^a	1.48 ± 0.04^b	1.39 ± 0.03^c	**
Rate of CH4 (mL/h)	0.34 ± 0.02^a	0.29 ± 0.02^b	0.24 ± 0.01^c	**
CH4/total	0.22 ± 0.012^a	0.20 ± 0.015^b	0.18 ± 0.008^c	**

Data are mean ± SD.
NS: not significantly different.
*Significantly different at 5% level.
**Significantly different at 1% level.
a, b, and c: indicating means within row differed significantly.