据统计,全国玉米总播种面积达2400万hm~2,但是玉米机收率仅为2％,98％的玉米至今还是靠人工收获,全国小麦机收率达64％,两者机械化程度差距甚大。如果实现玉米联合收获,按机收率40％计算,全国至少需要14万台玉米联合收获机,可见推广玉米联合收获机械化任务十分巨大。然而玉米联合收获机械化技术推广存在诸多的制约因素。 1.机具性能不过关影响作业质量和推广效果。现有的玉米收获机械作业无故障时间短,玉 According to statistics, the total sown area of ​​corn is 24 million hm ~ 2, but the corn yield is only 2%. 98% of the corn still relies on artificial harvesting till now, and the national wheat harvest rate reaches 64%. The difference in mechanization between the two is very big . If the combined corn harvest, according to the machine yield of 40%, the country needs at least 140,000 units of corn combine harvester, we can see the promotion of corn combined harvesting mechanization task is enormous. However, corn combine harvesting mechanization technology there are many constraints. 1. Tool performance but off the impact of job quality and promotion effect. The existing maize harvesting machinery work time is short, jade