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本文搜集分析了近年来有关我国农用拖拉机经济寿命的研究成果,并进行综合分类。认为这些研究成果在机型和地域上具有较大的覆盖面,能够代表全国的一般情况,其计算方法大体可分为6类。在此基础上得出我国农用拖拉机的经济寿命:大中型履带拖拉机为12年;大中型轮式拖拉机为10年;小型拖拉机为8年。最后提出了修正各地区拖拉机经济寿命的方法。
This paper collects and analyzes the research results about the economic life of agricultural tractors in China in recent years, and makes a comprehensive classification. It is considered that the results of these researches have relatively large coverage on models and geographies and can represent the general situation of the whole country. The calculation methods can be broadly divided into six categories. On this basis, the economic life expectancy of agricultural tractors in our country is obtained: 12 years for medium and large-sized crawler tractors, 10 years for medium and large wheeled tractors and 8 years for small tractors. Finally, it proposes a method of amending the economic life span of tractors in various regions.