棉花储藏过程中品质指标自然变异规律及影响因素研究

Study on the natural variation law and influencing factors of quality indexes during cotton storage

棉花在储藏过程中品质指标会发生自然变异,导致棉花品质下降并影响后续纺织生产。本文对储藏在徐州库棉花的9个品质相关指标进行为期14个月的跟踪试验并对数据进行统计学分析,发现储藏时间会显著影响棉花上半部平均长度、长度整齐度指数、断裂比强度、断裂伸长率、黄色深度、纺纱均匀性、含糖率;棉花的颜色级会显著影响长度整齐度指数、黄色深度、纺纱均匀性、上半部平均长度、断裂伸长率、含糖率;棉包的存放位置会显著影响断裂比强度、含糖率。此外,本研究发现棉花储藏环境中的相对湿度和室内温度对上半部平均长度、长度整齐度指数、断裂比强度、黄色深度、纺纱均匀性、含糖率6个指标的变化均有显著影响;相对湿度对反射率的变化有显著影响;马克隆值、断裂伸长率的变化没有受到温湿度的显著影响。

The quality indexes of cotton will undergo natural variation during storage,which will lead to the decline of cotton quality and affect the subsequent textile production.In this paper,a 14-month follow-up test was conducted on nine quality-related indicators of cotton stored in Xuzhou Library and the data were statistically analyzed.It was found that the storage time would significantly affect the average length of the upper half of the cotton,length uniformity index,breaking strength,elongation at break,yellow depth,spinning uniformity,and sugar content.The color grade of cotton will significantly affect the length uniformity index,yellow depth,spinning uniformity,average length of the upper half,elongation at break and sugar content.The storage position of cotton bales will significantly affect the breaking strength and sugar content.In addition,this study found that the relative humidity and indoor temperature in the cotton storage environment had significant effects on the average length of the upper half,length uniformity index,breaking specific strength,yellow depth,spinning uniformity,and sugar content.The relative humidity has a significant effect on the change of reflectivity.The changes of micronaire value and elongation at break were not significantly affected by temperature and humidity.