CAJ | 학술논문

为了探讨江苏省稻米重金属镉检测多级抽样最佳试验方案，本文以一个三级抽样检测结果为例，经方差分析F检验，发现地市间和样点村间差异均极显著，各级误差方差以地市间最大。在此基础上，探讨了在一定精确度保证下的最优配置抽样方案。结果表明，为了提高调查的精确度，在经费许可的条件下可采用随机抽取6个地市，每个地市随机抽取20个样点村或农技推广站，每个样点村随机重复2次的抽样方案；若资金较为紧张，在保证当前精确度的基础上，亦可以采用随机抽取6个地市，每个地市随机抽取10个样点村或农技推广站，每个样点村随机重复2次的抽样方案。
위료탐토강소성도미중금속력검측다급추양최가시험방안，본문이일개삼급추양검측결과위례，경방차분석F검험，발현지시간화양점촌간차이균겁현저，각급오차방차이지시간최대。재차기출상，탐토료재일정정학도보증하적최우배치추양방안。결과표명，위료제고조사적정학도，재경비허가적조건하가채용수궤추취6개지시，매개지시수궤추취20개양점촌혹농기추엄참，매개양점촌수궤중복2차적추양방안；약자금교위긴장，재보증당전정학도적기출상，역가이채용수궤추취6개지시，매개지시수궤추취10개양점촌혹농기추엄참，매개양점촌수궤중복2차적추양방안。
A three stage sampling survey as a real example was used to investigate the optimal plan of the sampling survey for cadmium in rice in Jiangsu Province. F-test showed that differences of the survey among cities and sampling villages were both very significant, and the error variance among cities was the largest in the experiment. In this paper, considering the survey ex-penses, the optimal sampling plan was explored under a certain accuracy. The results indicated that six cities were randomly sam-pled and twenty villages or agricultural extension stations were selected at random from each city, with twice sampling in each village in order to increase the precision of the survey. If there is a lack of funds, on the basis of ensuring the current sampling accuracy, we suggest that ten villages or agricultural extension stations from each city can be sampled alternatively.