农地规模、种植方式对油菜生产技术效率的影响

Effects of agricultural land scales and planting methods on technical efficiency of rape production

基于国家油菜产业技术体系27个实验站596户微观调查数据,利用随机前沿生产函数模型、受限Tobit模型和倾向得分匹配法,系统分析了农地规模、种植方式对油菜生产技术效率的影响和作用机制。结果表明:农地规模对油菜生产技术效率具有显著正向影响;但农地规模扩大会促进直播方式采用,而直播会降低油菜生产技术效率,存在31.51%的遮掩效应;当其它因素不变,相较于移栽,采用直播的油菜产出要低900元/hm^(2)左右。本研究认为,鼓励规模化经营种植时,不能忽视经由增加直播方式采用而带来的遮掩效应。相关机构应加强直播和配套技术的指导服务,加强油菜优良品种改良,以及加强油菜精准栽培技术方面的研发。

Based on the micro survey data of 596 households in 27 experimental stations of the national rape industry technology system,this study systematically analyzes the influence and mechanism of agricultural land scale and planting mode on rape production technology efficiency by using random frontier production function model,limited Tobit model and propensity score matching method.The results showed that:The scale of agricultural land had a significant positive impact on the technical efficiency of rape production;However,the expansion of agricultural land scale promoted the adoption of direct seeding,and direct seeding reduced the technical efficiency of rape production,with a masking effect of 31.51%;Compared with transplanting,When other factors remain unchanged,the output of rape with direct seeding was about 900 yuan/hm^(2) lower.In conclusion,this study recommends that when encouraging large-scale management and planting,the masking effect brought by increasing the adoption of direct broadcasting can not be ignored.Relevant institutions should enhance the guidance service of direct seeding and supporting technology,strengthen the improvement of excellent rape varieties,and strengthen the research and development of rape precision cultivation technology.