SHIFTS AND HARVESTING SYSTEMS ON QUALITY OF IMPURITIES SAMPLES IN SUGARCANE

ABSTRACT Semi-mechanical and mechanical harvesting methods may influence the content of impurities in harvested sugarcane. This study aimed to evaluate the quality of three mechanical methods of sugarcane harvesting: one semi-mechanical, and two mechanical ones - self-performed and outsourced, during three working shifts. As quality indicators, both mineral and vegetal impurities were accounted. About 50 random samples were collected in the studied area during 35 harvest days and in three working shifts, for each harvesting method. Mineral impurities showed similar behavior for both self-performed and outsourced mechanical harvesting, thus displaying a low variability. On the other hand, vegetal impurities showed to be unstable for all three shifts. Additionally, the statistical process control analysis showed that the semi-mechanical method had the greatest variability.

摘要：半机械化与机械化甘蔗采收方式可能会影响收获物料中的杂质含量。本研究旨在评估三种甘蔗采收方案（1种半机械化采收模式、2种机械化采收模式——自主作业式与外包作业式）在三个作业班次下的采收质量。研究以矿物杂质与植物杂质作为质量评价指标，针对每种采收方式，在35个采收日的三个作业班次中于研究区域内采集了约50份随机样本。结果显示，自主作业与外包作业的机械化采收方式下，矿物杂质含量呈现相近的变化规律，变异程度较低；与之相对，植物杂质含量在全部三个作业班次中均表现出不稳定性。此外，统计过程控制分析表明，半机械化采收方式的杂质含量变异程度最高。