摘要： 本文从机械-土壤-作物的系统关系探讨了由于机械化而带来的土壤压实及对农作物产量的影响，探讨了目前拖拉机能耗较高的原因和农机农艺脱节问题。根据调查研究结果提出了大跨度田间作业机的设想与设计，力图从根本上解决机械对壤的压实破坏及大幅度地降低燃油消耗，并能适应于中国精耕细作多种种植制度的农业生产特点。

关键词: 拖拉机, 土壤压实, 能耗, 大跨度田间作业机

Abstract: In this paper we studied the soil compaction brought about by mechanization and its impact on crop yield from the interrelations among machinery,soil and crops,and probes the causes of high energy consumed by today’s tractors as well as problems of separation of farm machinery from agronomy.Based on the results of investigation,an idea of and a design for a wide-span field operator have been proposed for the purpose of thoroughly solving the problem of soil compaction and damage caused by machinery,greatly reducing the consumption of fuel,and suiting China’s characteristic of intensive farming and multiple cropping.

Key words: Tractor, Soil compaction, Energy consumption, Wide-span field operator