| 模型 | 未标准化系数 | 标准化系数 | t | 显著性 | ||
| B | 标准误差 | Beta | ||||
| 1 | (常量) | −474896.893 | 51380.985 |
| −9.243 | 0.000 |
| 粮食产量(万吨) | 8.041 | 0.766 | 0.970 | 10.503 | 0.000 | |
| 2 | (常量) | −465639.519 | 25303.398 |
| −18.402 | 0.000 |
| 粮食产量(万吨) | 5.640 | 0.626 | 0.680 | 9.012 | 0.000 | |
| 有效灌溉面积(千公顷) | 2.235 | 0.466 | 0.362 | 4.799 | 0.003 | |
| 3 | (常量) | −377198.456 | 21308.842 |
| −17.701 | 0.000 |
| 粮食产量(万吨) | 4.954 | 0.316 | 0.597 | 15.682 | 0.000 | |
| 有效灌溉面积(千公顷) | 1.733 | 0.234 | 0.281 | 7.395 | 0.001 | |
| 受灾面积(千公顷) | −0.425 | 0.086 | −0.186 | −4.923 | 0.004 | |