作物种植专业化与化肥减量来源——兼顾经营规模的影响
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曾琳琳, 李晓云, 杨志海
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Crop specialization and chemical fertilizer reduction: The pathway of operation scale
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ZENG Lin-lin, LI Xiao-yun, YANG Zhi-hai
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表3 作物种植专业化对化肥利用效率的影响
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Table 3 The impact of crop specialization on fertilizer use efficiency
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| 变量 | （1）化肥 | （2）氮肥 | （3）磷肥 | （4）复合肥 | | 横向专业化 | 0.021***
(0.003) | — | 0.021***
(0.003) | — | 0.022***
(0.005) | — | 0.040***
(0.004) | — | | 纵向专业化 | — | 0.049***
(0.003) | — | 0.058***
(0.004) | — | 0.057***
(0.008) | — | 0.062***
(0.004) | | 常数项 | 2.787***
(0.155) | 3.705***
(0.077) | 3.133***
(0.186) | 4.098***
(0.084) | 4.303***
(0.246) | 5.313***
(0.129) | 3.203***
(0.187) | 4.813***
(0.100) | | 观测值/个 | 507 | 507 | 507 | 507 | 507 | 507 | 442 | 442 | | R2 | 0.710 | 0.782 | 0.716 | 0.806 | 0.569 | 0.629 | 0.836 | 0.865 |
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