储粮扦样环节中扦样点数分析研究

Analysis and study on the number of sample points in the sampling process of grain storage

中文关键词:  平房仓  储藏小麦  扦样方案  扦样点数  质量指标

英文关键词:flat house warehouse  stored wheat  sampling scheme  number of sample points  index of quality

中文摘要:

      目的 研究选取粮仓中的储藏小麦在扦样环节中具有代表性且能客观有效反映储粮质量的扦样点数并进行验证。方法 以平房仓中储藏小麦为研究对象, 选取两个仓房中的3处区域作为平行实验单元, 按已有研究进行分层分区后, 依次选取3~9个扦样点数均匀布点后分别扦样, 并对其容重和水分进行测定, 采用SPSS进行单因素方差分析, 依据不同扦样点数之间的质量指标差异, 探讨储粮扦样时的最佳扦样点数及布点设置, 并以此制定扦样方案A, 与以相关国家标准为依据制定扦样方案B在实仓中进行对比验证。结果 当选取扦样点数为5个时, 能较好反映该分区内的小麦容重状况; 选取扦样点数为5~8个时, 能较好反映该分区内的小麦水分状况; 两种扦样方案所扦取样品的质量指标检验结果相同, 扦样方案A所取得的样品离散程度更低, 波动幅度更小。结论 分层分区后应选取5个扦样点(中心1个、四角各1个), 既能扦取具有代表性的样品, 又能合理有效反映该区域内小麦的质量状况; 以此制定的扦样方案可以满足于当前我国平房仓储粮实际扦样需求, 能够适用于当前我国的平房仓储粮现状。

英文摘要:

      Objective To study and select the representative number of sample points of stored wheat in the granary that can objectively and effectively reflect the quality of stored grain in the sampling process and verify them. Methods With wheat stored in the bunghouse warehouse as the research object, 3 areas in 2 warehouses were selected as parallel experimental units. After stratification and partitioning according to the existing studies, 3?9 evenly spaced points were selected in turn to sample respectively, and their bulk density and moisture were measured. SPSS was used for one-way analysis of variance. According to the difference of quality indicators between different number of sample points, the optimal number of sample points and distribution settings were discussed during the sampling process of grain storage, and sampling plan A was formulated based on this, and the sampling plan B was formulated based on relevant national standards for comparison and verification in the in the solid warehouse. Results When the number of sample points was 5, the bulk density of wheat in the subdivision could be better reflected. When the number of sample points was 5?8, it could better reflect the moisture condition of wheat in this region. The quality index test results of the samples obtained by 2 schemes were the same, and the samples obtained by scheme A were less discrete and less volatile. Conclusion After stratification, 5 sampling points (1 in the center and 1 in each corner) should be selected to not only select representative samples, but also reasonably and effectively reflect the quality of wheat in the region. The preparation of sample scheme in this way can satisfy the actual demand of house grain storage, and can be suitable for the current situation of house grain storage.