中国粮食生产的区域类型和生产模式演变分析
李政通, 姚成胜, 梁龙武

Analysis on regional types of grain production and evolution of grain production models in China
Zhengtong LI, Chengsheng YAO, Longwu LIANG
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
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