关键词: 西南地区, 玉米, 生产潜力, 机械化水平, 改地适机, 改机适地

Abstract: This paper focuses on the two main contents of exploiting the maize production potential in Southwest China and improving the mechanization supporting capacity, and makes an indepth study on the constraints, main channels and technical support measures of mechanization for the expansion of production. Aiming at the problems of complex planting conditions and models, stable and declining corn planting area, rapid but still low increase in maize yield per unit area, and low level of mechanization, the research proposed three effective channels to expand maize production capacity in Southwest China, namely, restoring abandoned land and lowefficiency forest land, steadily and orderly expanding intercropping, and accelerating maize yield per unit area. The two key measures to expand maize production and increase maize production capacity in Southwest China were to change the land to accommodate machinery and adapt the machinery to the land. The main contents, transformation space and feasibility of improving the passage and working conditions of agricultural machinery were deeply analyzed, the current situation and existing problems of corn mechanization development in Southwest China were clarified by link, and the improvement direction was clarified from solving the problems of complicated corn planting climate, heavy soil viscosity and diverse agronomy in Southwest China. Finally, it put forward development suggestions such as decomposing corn to expand production tasks, improving the access and working conditions of agricultural machinery, speeding up the key link of machinery and tools to make up for shortcomings, promoting the integration of agricultural machinery and agriculture, building a fullprocess mechanized production mode, and accelerating the cultivation and expansion of largescale management bodies. The study showed that by improving the operation and traffic conditions of agricultural machinery in the hilly and mountainous areas of Southwest China, speeding up the repair of corn machinery seed and the short board of machinery harvest, it could effectively promote the rehabilitation of abandoned land and lowefficiency forest land, orderly expansion of intercropping and increase the yield of corn per unit area, and the corn yield in Southwest China is expected to increase by more than 8 000kt.

Key words: Southwest China, maize, expansion potential, level of mechanization, improving land to accommodate machinery, adapting the machine to the soil