目前,国内外小型拖拉机从传动系统方面来看可分为直接传动和皮带传动。不论是保有量或年产量后者在国内所占比例远远超过前者。在能源日益紧张的情况下,对两者在经济性和效率方面的优劣需要作一分析,但详细论述要涉及多方面的问题,下面仅就拖拉机牵引性能试验中经济性指标和效率指标的数据统计分析来作一探讨。列举的拖拉机机型中,轮式拖拉机有10个厂家,为表述方便,把直接传动的一个厂家编号为1,皮带传动的厂家编号为2～10;手扶拖拉机10 At present, domestic and foreign small tractors from the transmission system can be divided into direct drive and belt drive. Whether the amount of possession or annual output of the latter in the country far more than the former. In the increasingly tense energy situation, both economic and efficiency aspects of the need to make an analysis of the pros and cons, but a detailed discussion to be involved in many aspects, the following tractor traction performance test only economic indicators and efficiency indicators Data statistical analysis to make a discussion. Enumerated tractor models, wheeled tractors have 10 manufacturers, for the convenience of expression, the direct drive of a manufacturer number 1, the belt drive manufacturer number 2 to 10; Walking Tractor 10