大豆玉米带状复合种植模式采用效果评价——基于短期成本理论的双案例研究

The Utility Evaluation of the Maize-Soybean Relay Strip Intercropping System:A Dual-Case Study Based on Short-term Cost Theory

“不缺主粮缺大豆”已成为中国粮食生产现状,振兴大豆生产对维护国家粮食安全和社会稳定意义重大。本文聚焦大豆玉米带状复合种植模式,采用探索式多案例研究方法,基于四川省两个典型案例地区访谈数据资料,利用微观经济学“短期成本理论”,探究在生产的不同发展阶段,产量与竞争力的变动趋势和演绎规律。研究发现,案例地区大豆玉米带状复合种植模式的生产处于“第一阶段”,未实现产量最大化,加大要素投入能够同时提高产量和成本竞争优势;然而,在进入生产“第二阶段”后,增加产量会带来生产成本升高和农民收益下降。基于此,本文提出要注重产量与成本优势平衡,以更好地实现粮食安全,有效地保障民生。

There is no shortage of staple food grains except for soybeans in China's grain production.Hence the revitalization of soybean production is of great significance to the maintenance of food security and social stability in the country.This paper uses an exploratory multi-case study method focusing on the maize-soybean relay strip intercropping technology implemented in two areas in Sichuan Province.The paper explores the variation trend and deduction law of output and competitiveness in different development stages of production based on short-term cost theory of microeconomics.The research finds that productions in case areas are both at the first stage and have not reached the maximum yield.Increasing inputs can simultaneously improve the yield and cost competitive advantage.However,after entering the second phase of the production,yield increase will bring higher costs and lower returns to farmers.Based on that,this paper proposes to focus on the balance between yield and cost advantage in order to better achieve food security and protect people's livelihood.