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    经济经纬 2026 Issue (1) :32-43
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    耕地细碎度何以影响粮食生产?
吕秋杭
上海财经大学 公共管理学院,上海 200433
    How Does Cultivated Land Fragmentation Affect Grain Production in China?
    LYU Qiuhang
School of Public Administration, Shanghai University of Finance and Economics, Shanghai 200433, China
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摘要 基于全国农村微观农户面板数据,检验了耕地细碎度对粮食生产的影响,并剖析其作用机制。研究发现:耕地细碎度显著降低了粮食单产,经过内生性讨论和稳健性检验后,该结论依旧成立;异质性分析发现,耕地细碎度对粮食单产的抑制作用在非粮食主产区、过大或过小的粮食生产经营规模和老龄化程度高的农户家庭中更为突出;机制检验结果表明,耕地细碎度可以通过提高兼业化程度、促进种植结构“非粮化”影响农户粮食单产;进一步分析发现,耕地细碎度对粮食单产的影响存在基于化肥施用强度的单一门槛效应。因此,应从健全耕地流转市场、提高粮食生产比较收益、促进化肥农药减量增效等方面着手,切实保障农民权益,以推动农业现代化发展,筑牢粮食安全根基。
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吕秋杭
关键词耕地细碎度   粮食安全   粮食单产   种植结构“非粮化”   化肥施用强度     
Abstract: Based on nationwide panel data of rural micro-households, this study empirically examines the impact of cultivated land fragmentation on grain production and analyzes its underlying mechanisms. The study shows that cultivated land fragmentation significantly reduces grain yield. This conclusion remains robust after addressing potential endogeneity and conducting robustness tests. Heterogeneity analysis further reveals that the inhibitory effect of land fragmentation on grain yield is more pronounced in non-major grain-producing areas, under excessively large or small operational scales, and within households characterized by a high degree of aging. The results of the mechanism analysis indicate that cultivated land fragmentation can affect farm household grain yield by increasing the degree of part-time farming and promoting a “non-grain” shift in the planting structure. Further analysis reveals a single threshold effect based on fertilizer application intensity in the impact of land fragmentation on grain yield. Therefore, to safeguard farmers’ rights and interests, promote agricultural modernization and strengthen the foundation of food security, measures should be implemented through improving the functioning of the farmland transfer market, enhancing the comparative returns of grain production, and advancing the reduction and efficiency improvement of chemical fertilizers and pesticides.
KeywordsCultivated Land Fragmentation   Grain Security   Grain Yield   “Non-grain” Trend in Planting Structure   Fertilizer Application Intensity     
收稿日期 2024-12-15; 接受日期 ;
基金资助:中央高校基本科研业务费专项资金资助(CXJJ-2025-306)
作者简介: 吕秋杭(1998— ),男,重庆南川人,博士研究生,主要从事土地利用与粮食安全研究。
引用本文:   
吕秋杭.耕地细碎度何以影响粮食生产?[J].  经济经纬, 2026,1: 32-43
LYU Qiuhang.How Does Cultivated Land Fragmentation Affect Grain Production in China?[J]  Economic Survey, 2026,V43(1): 32-43
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http://www.jjjw.org.cn/CN/     或     http://www.jjjw.org.cn/CN/Y2026/V43/I1/32
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