Comparison of equipment for grain sampling

ABSTRACT Grain sampling requires the use of appropriate and accurate equipment. This study aimed to compare grain samplers, manual and mechanical, used in the sampling of soybean loads, during their reception by storage units. The used devices were the manual sampler with 1.80 m length and three opening stages, 2.10 m length and three opening stages; and 2.10 m length and one opening stage, besides the mechanical sampler (pneumatic) and the pelican sampler. The analyzed parameters were the contents of impurity, broken grains, pods, immature grains, and moisture. The significance of effect of treatment was determined by F Test and the means were compared by Tukey test (p &lt; 0.05). The devices used for sampling of soybean grains in vehicles, during their reception by storage units, affect the determination of broken grains, pods and immature grains. However, there was no difference between the types of sampling equipment in the determination of impurity content, and the pelican sampler collected greater percentages of pods and immature grains from the sampled vehicles.摘要：谷物取样需采用合适且精准的设备。本研究旨在对比仓储单位接收大豆货载时，用于大豆批次取样的手动取样器（manual sampler）与机械式取样器。本次实验所用设备包括三款手动取样器：分别为长度1.80 m、3个开口档位的手动取样器，长度2.10 m、3个开口档位的手动取样器，以及长度2.10 m、1个开口档位的手动取样器；此外还有气动机械式取样器（mechanical sampler, pneumatic）与鹈鹕式取样器（pelican sampler）。本次分析的参数包括杂质含量、破损籽粒、荚果、未成熟籽粒与含水率。采用F检验（F Test）确定各处理的效应显著性，并通过Tukey检验（Tukey test）对各组均值进行多重比较（p<0.05）。结果表明，仓储单位接收车载大豆过程中使用的取样设备，会对破损籽粒、荚果及未成熟籽粒的检测结果产生影响。但不同类型的取样设备在杂质含量检测方面无显著差异；且鹈鹕式取样器从待测车载样本中采集的荚果与未成熟籽粒占比更高。