中国粮食生产的区域类型和生产模式演变分析
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李政通, 姚成胜, 梁龙武
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Analysis on regional types of grain production and evolution of grain production models in China
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Zhengtong LI, Chengsheng YAO, Longwu LIANG
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表4 粮食产量变化模式演变的影响因素回归系数表 |
Tab. 4 Regression coefficients of influence factors of grain production evolution model |
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变量 | 模式I | 模式II | 模式III | 模式IV | 模式V | 模式VI | fert | -3.266* (1.824) | -0.018 (1.362) | -1.290 (2.498) | -1.568 (2.227) | 0.934 (1.498) | -3.664 (2.286) | sown | 1.132 (1.014) | 3.193*** (1.033) | 4.359*** (1.004) | 1.771 (1.341) | -2.005 (1.738) | -1.992 (1.539) | irrig | -2.231 (2.234) | 0.133 (1.081) | -2.524* (1.472) | 1.161 (1.376) | 1.748 (1.264) | 0.698 (1.265) | mech | -0.201 (1.115) | -0.970 (1.033) | 2.937* (1.771) | 2.947* (1.599) | -0.963 (0.853) | 2.651 (1.951) | urban | -0.124 (0.391) | -0.030 (0.273) | -0.937* (0.517) | -0.988* (0.572) | -0.227 (0.373) | 0.298 (0.268) | incom | 1.478 (2.698) | -1.705 (1.527) | -1.417 (2.049) | -3.270** (1.559) | -2.058 (1.317) | -0.473 (1.820) | gcpi | 1.968*** (0.698) | 3.138*** (0.925) | -1.027 (1.188) | 0.229 (1.058) | 1.167 (1.013) | 1.898 (1.376) | cons | -5.377* (2.963) | -2.506 (1.870) | 0.801*** (2.575) | 1.473 (1.567) | -0.183 (1.556) | -3.338* (1.729) | N | 465 | 465 | 465 | 465 | 465 | 465 | Wald chi2 | 12.26** | 23.84*** | 52.89*** | 17.12** | 9.93 | 8.25 | Pseudo R2 | 0.037 | 0.047 | 0.053 | 0.047 | 0.019 | 0.030 |
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