在玉米收获季节,通过6组不同收获机械收获玉米子粒的对比试验与测试,研究不同机械作业对玉米子粒直收质量的影响。结果表明,机械收获子粒后,子粒破碎率普遍较高,大多超过5%的国家标准;杂质率和落粒损失率普遍较低,分别低于3%和5%的国家标准。子粒破碎率和落粒损失率在不同收获机械及其作业之间存在明显差异,杂质率差异相对较小,收获机械作业是造成玉米子粒破碎率的一个重要因素。

Six group experiments of maize grain harvest used different combine harvester were conducted dur- ing maize harvesting. The results showed that grain broken rate was generally higher, most of their grain broken rate were more than 5% of national standard, but the impurity rate and grain loss rate were low. There were significant difference on the grain broken rate and the grain loss rate with different combine harvesters, but the difference of the impurity rate of grain with different combine harvester were not significant. Those indicated that different combine harvester was an important factor in maize grain broken rate.

国家自然科学基金项目(31271663)、国家玉米产业技术体系项目(CARS-02-025)