| 摘要: |
| 目的 理清耕地细碎化对粮食生产技术效率的非线性影响及其作用机制，对提高粮食产量、保障中国粮食安全具有重要意义。方法 文章基于陕西省603户农户的实地调研数据，运用数据包络分析模型（DEA）测算了农户粮食生产技术效率，借助Tobit模型分析了耕地细碎化对粮食生产技术效率的非线性影响，并进一步运用中介效应模型探讨了农户兼业在其中的中介作用。结果 （1）调研地区全体农户的平均粮食生产技术效率值偏低且分化严重；（2）耕地细碎化对粮食生产技术效率影响呈现弱显著的倒U型关系；（3）农户兼业程度对粮食生产技术效率影响的总效应呈现显著的U型关系；（4）农户兼业在耕地细碎化对粮食生产技术效率的影响中发挥了部分中介效应。结论 （1）多管齐下解决耕地细碎化问题，推行适度规模经营；（2）依托个体农户特征差异，针对性引导农户职业合理分化。 |
| 关键词: 耕地细碎化 农户兼业 生产技术效率 DEA-Tobit模型 中介效应 |
| DOI：10.7621/cjarrp.1005-9121.20240204 |
| 分类号:F301.2 |
| 基金项目:陕西省重点研发计划项目重点产业创新链（群）-农业领域“中低产粮田改造工程关键技术研发及示范”（2022ZDLNY02-01）；国家自然科学基金项目“陕北不同细碎化整治模式下耕地利用转型的过程、机制与效应研究”（42171267）；陕西省自然科学基础研究计划一般项目“开放环境条件下陕西自然资本核算及警情调控研究”（2022JQ-747） |
|
| RESEARCH ON THE NON-LINEAR EFFECT OF CULTIVATED LAND FRAGMENTATION ON GRAIN PRODUCTION TECHNICAL EFFICIENCY——ANALYSIS OF THE MEDIATING EFFECT BASED ON FARMERS’ CONCURRENT BUSINESS |
|
Shen Shuhong, Niu Wenhao, Li Xian, Jin Yaya, Zhang Bangbang
|
|
College of Economics and Management, Northwest A&F University, Yangling 712100, Shaanxi, China
|
| Abstract: |
| Clarifying the nonlinear impact and mechanism of cultivated land fragmentation on the grain production technical efficiency and its mechanism is of great significance for improving grain yield and ensuring China's food security in China. Based on the field survey data of 603 farmers in Shaanxi province, this paper measured the technical efficiency of grain production of farmers through data envelopment analysis (DEA) model, and analyzed and discussed the direct effect of cultivated land fragmentation on the technical efficiency of grain production and the mediating effect of the transmission of farmers' concurrent business. The results were showed as follows. (1) The average technical efficiency of grain production of all farmers in the surveyed area was low and highly differentiated; (2) The effect of cultivated land fragmentation on grain production technical efficiency showed a weakly significant "inverted U" shaped relationship; (3) The effect of farmers' concurrent business on grain production technical efficiency showed a significant "U" shaped relationship; (4) Farmers' concurrent business had played a partial mediating effect in the impact of cultivated land fragmentation on the grain production technical efficiency. Therefore, in order to solve the problem of cultivated land fragmentation, it should adopt multiple approaches and promote moderate scale management, and then relying on the differences in individual farmers' characteristics, targeted guidance should be given to the rational differentiation of farmers' occupations. |
| Key words: cultivated land fragmentation farmers' concurrent business production technical efficiency DEA-Tobit model mediating effect |
