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Economic benefit analysis with different soil amendments.
| Treatments | Annual yield (t ha−1) | Increased production (t ha−1) | Incremental production value (dollar ha−1) | Cost (dollar ha−1) | Benefit (dollar ha−1) |
|---|---|---|---|---|---|
| CK | 11.31 | – | – | – | – |
| LM | 11.79 | 0.48 | 192 | 87.72 | 104.28 |
| SC | 13.70 | 2.39 | 956 | 394.74 | 561.26 |
| BC | 14.29 | 2.98 | 1192 | 2339.18 | − 1147.18 |
The price of rice is 400 US dollars t−1 (RMB to US dollar exchange rate 1:6.84).
CK control, BC biochar, LM lime, SC silicon–calcium fertilizer.
