Descriptive statistics of yield, total GHG emissions (total GHG), carbon sequestration (CS), carbon footprint (CF), production carbon footprint (CFY), carbon efficiency (CFI) and profit in 2010, 2014 and 2019
| Year | Factors | Yield | Total GHG | CS | CF | CFY | CFI | Profit |
|---|---|---|---|---|---|---|---|---|
| 2010 | Average（87） | 32,021.26 | 4,887.35 | 286.64 | 4,600.71 | 0.16 | 4.13a | 312.98a |
| SD | 9,378.63 | 3,552.02 | 601.25 | 3,085.33 | 0.14 | 3.29 | 401.89 | |
| SE | 1,005.49 | 380.82 | 64.46 | 330.78 | 0.02 | 0.35 | 43.09 | |
| 2014 | Average （86） | 32,499.33 | 5,341.21 | 246.56 | 5,094.65 | 0.18 | 3.85a | 516.45a |
| SD | 13,023.65 | 4,296.39 | 375.63 | 4,129.34 | 0.16 | 3.15 | 619.36 | |
| SE | 1,404.38 | 463.29 | 40.51 | 445.28 | 0.02 | 0.34 | 66.79 | |
| 2019 | Average （116） | 32,041.02 | 4,867.12 | 198.91 | 4,668.21 | 0.18 | 2.91b | −11.33b |
| SD | 14,835.18 | 4,979.64 | 599.17 | 4,599.64 | 0.19 | 2.80 | 850.39 | |
| SE | 1,377.41 | 462.35 | 55.63 | 427.07 | 0.02 | 0.26 | 78.96 | |
| Total | Average （289） | 32,171.45 | 5,014.29 | 239.50 | 4,774.79 | 0.17 | 3.56 | 243.36 |
| SD | 12,816.06 | 4,377.50 | 542.49 | 4,045.66 | 0.17 | 3.09 | 707.16 | |
| SE | 753.89 | 257.50 | 31.91 | 237.98 | 0.01 | 0.18 | 41.60 |
| Year | Factors | Yield | Total GHG | CS | CF | CFY | CFI | Profit |
|---|---|---|---|---|---|---|---|---|
| 2010 | Average（87） | 32,021.26 | 4,887.35 | 286.64 | 4,600.71 | 0.16 | 4.13a | 312.98a |
| SD | 9,378.63 | 3,552.02 | 601.25 | 3,085.33 | 0.14 | 3.29 | 401.89 | |
| SE | 1,005.49 | 380.82 | 64.46 | 330.78 | 0.02 | 0.35 | 43.09 | |
| 2014 | Average （86） | 32,499.33 | 5,341.21 | 246.56 | 5,094.65 | 0.18 | 3.85a | 516.45a |
| SD | 13,023.65 | 4,296.39 | 375.63 | 4,129.34 | 0.16 | 3.15 | 619.36 | |
| SE | 1,404.38 | 463.29 | 40.51 | 445.28 | 0.02 | 0.34 | 66.79 | |
| 2019 | Average （116） | 32,041.02 | 4,867.12 | 198.91 | 4,668.21 | 0.18 | 2.91b | −11.33b |
| SD | 14,835.18 | 4,979.64 | 599.17 | 4,599.64 | 0.19 | 2.80 | 850.39 | |
| SE | 1,377.41 | 462.35 | 55.63 | 427.07 | 0.02 | 0.26 | 78.96 | |
| Total | Average （289） | 32,171.45 | 5,014.29 | 239.50 | 4,774.79 | 0.17 | 3.56 | 243.36 |
| SD | 12,816.06 | 4,377.50 | 542.49 | 4,045.66 | 0.17 | 3.09 | 707.16 | |
| SE | 753.89 | 257.50 | 31.91 | 237.98 | 0.01 | 0.18 | 41.60 |
The numbers in parentheses indicate the sample sizes of surveyed households in 2010, 2014 and 2019. SD indicates standard deviation. SE indicates standard error. The different letters (a and b) behind the numbers indicate that there is a statistically significant difference (p < 0.05) in different years