Table 3.
Emergy indices of the crop system and the bamboo plantation at 3 and 8 years’ old
| Index | CP | BR | PA | PP | |||
|---|---|---|---|---|---|---|---|
|
| |||||||
| — | 3 years’ old | 8 years’ old | 3 years’ old | 8 years’ old | 3 years’ old | 8 years’ old | |
| EPD (sej/ha/yr) |
(1.51E+16)±(1.79E+14) | (2.12E+15)±(2.30E+13) | (1.29E+15)±(9.98E+12) | (2.46E+15)±(5.29E+12) | (1.67E+15)±(1.78E+13) | 4.23E+15 | (1.87E+15)±(3.84E+12) |
| UEV (sej/g) |
(2.06E+8)±(4.71E+7) (sweet potato) |
— (shoot) |
— (shoot) |
(2.86E+8)±(2.84E+7) (shoot) |
(1.93E+8)±(1.15E+7) (shoot) |
— (shoot) |
(2.35E+8)±(9.41E+6) (shoot) |
| (5.20E+8)±(1.18E+8) (corn) |
(1.62E+8)±(1.02E+7) (culm) |
(6.93E+7)±(3.30E+6) (culm) |
(2.87E+8)±(2.82E+7) (culm) |
(1.29E+8)±(1.28E+7) (culm) |
(1.00E+9)±(2.85E+8) (culm) |
(8.22E+7)±(1.25E+6) (culm) |
|
| ESR | 0.69±0.01 | 0.92±0.01 | 0.83±0.01 | 0.97±0.00 | 0.80±0.01 | 1.00±0.00 | 0.75±0.00 |
| EYR | 3.23±0.09 | 12.76±1.62 | 5.86±0.23 | 33.24±2.29 | 4.97±0.21 | 215.56±0.00 | 4.06±0.03 |
| ELR | 3.04±0.51 | 0.57±0.02 | 0.33±0.01 | 0.83±0.00 | 0.72±0.02 | 2.15±0.00 | 0.94±0.00 |
| ESI | 1.08±0.16 | 22.47±3.53 | 17.85±1.27 | 40.13±2.95 | 6.88±0.46 | 100.21±0.00 | 4.33±0.05 |
| EER | 1.23±0.04 | 1.97±0.12 | 5.42±0.25 | 3.93±0.30 | 7.48±0.56 | 1.00±0.00 | 7.00±0.19 |
| EISD | 1.32±0.17 | 44.11±4.59 | 96.51±2.49 | 157.34±5.78 | 51.33±1.07 | 100.21±0.00 | 30.29±0.71 |
| SIR | 0.60±0.01 | 0.28±0.00 | 0.08±0.00 | 0.42±0.00 | 0.22±0.00 | 0.68±0.00 | 0.17±0.12 |