随着农业生产责任制的不断完善和发展,农民的经济收入有了很大的提高。近年来,独户或联户购买拖拉机者越来越多,尤其是12～15马力的小四轮拖拉机,保有量增加很快。为解决小四轮拖拉机的配套农具问题,阜阳地区农机研究所1983年研制了2BF-9型谷物联合播种机(见图1),并于1984年元月12日通过了省级科研鉴定。 With the continuous improvement and development of the responsibility system for agricultural production, the economic income of farmers has been greatly improved. In recent years, more and more single-family or joint-stock purchase tractors, especially the small four-wheel tractors with 12 to 15 horsepower, the quantity kept increasing rapidly. In order to solve the problem of supporting small four-wheel tractors, the Fuyang Agricultural Machinery Research Institute developed the 2BF-9 grain planter (see Figure 1) in 1983 and passed the provincial scientific research appraisal on January 12,