Effect of freezing and thawing pretreatment on degradation of rice straw composition.

Tests	Contents (%)			Degradation (%)
	C	H	L	C	H	L
A1	37.24 ± 0.57	19.34 ± 0.32	9.70 ± 0.10	1.8 ± 0.20	9.3 ± 0.31	1.2 ± 0.10
A2	36.55 ± 0.45	16.42 ± 0.28	9.20 ± 0.09	3.6 ± 0.11	23.0 ± 0.25	6.3 ± 0.05
A3	36.44 ± 0.47	15.99 ± 0.31	8.82 ± 0.12	3.9 ± 0.10	25.0 ± 0.30	10.2 ± 0.10
B1	36.97 ± 0.37	18.55 ± 0.25	9.22 ± 0.10	2.5 ± 0.10	13.0 ± 0.21	6.1 ± 0.05
B2	36.37 ± 0.41	15.65 ± 0.20	8.73 ± 0.11	4.1 ± 0.17	26.6 ± 0.18	11.1 ± 0.08
B3	36.29 ± 0.42	15.48 ± 0.25	8.40 ± 0.10	4.3 ± 0.31	27.4 ± 0.13	14.5 ± 0.07
CK	37.92 ± 0.40	21.32 ± 0.15	9.82 ± 0.10	—	—	—