0引言农业机械推广鉴定大纲是农机产品推广鉴定的依据,是具有强制性要求的行业规范,其规定的指标应具有科学性、准确性。然而,在现行有效的农业机械推广鉴定大纲中,很多大纲都规定了机器的“作业小时生产率”这一指标,如DG/T015—2009型玉米收获机械、DG/T057—2011型油菜联合收获机及DG/T006—2012型微耕机,而且在大纲中规定这一指标似乎已经成为一 0 Introduction Outline of promotion of agricultural machinery identification is the basis for the promotion of agricultural machinery products identification is an industry standard with mandatory requirements, the provisions of its indicators should be scientific and accurate. However, in the current and effective outline of agricultural machinery appraisal and promotion, many of the synopsis stipulate the machine’s “hourly productivity”, such as DG / T015-2009 type corn harvester, DG / T057-2011 type rape union Harvester and DG / T006-2012 tillage machine, and the outline of this indicator seems to have become a