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 |