Table 1.
The compositions of UTRS, AC1RS and AC2RS
| Components |
Composition of rice straw (expressed as the percentage of oven dried, %) |
||
|---|---|---|---|
| UTRS | AC1RS | AC2RS | |
|
Structural components: |
|
|
|
| 1. Structural carbohydrates |
57.8 ± 0.6 |
57.2 ± 0.3 |
57.8 ± 0.4 |
| Glucan |
34.4 ± 0.6 |
33.8 ± 0.2 |
34.6 ± 0.4 |
| Xylan |
19.7 ± 0.2 |
19.8 ± 0.2 |
19.5 ± 0.1 |
| Arabinan |
3.7 ± 0.1 |
3.6 ± 0.0 |
3.7 ± 0.1 |
| 2. Lignin |
19.8 ± 0.8 |
15.4 ± 0.8 |
15.8 ± 1.0 |
| 3. Acetyl group |
1.6 ± 0.1 |
1.4 ± 0.1 |
1.7 ± 0.0 |
|
Non-structural components: |
|
|
|
| 1. Ash |
14.1 ± 0.2 |
13.5 ± 0.1 |
13.4 ± 0.2 |
| 2. Nitrogen (native) |
0.5 ± 0.2 |
0.5 ± 0.2 |
0.5 ± 0.2 |
| 3. Nitrogen (AFEX) |
NA |
2.5 ± 0.4 |
3.7 ± 0.4 |
| 4. Extractives | 6.7 ± 1.8 | 11.8 ± 1.4 | 12.8 ± 1.0 |
All values are means of duplicate ± standard deviation; NA – Not applicable.