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近年来,我国土壤微量元素的调查进展很快,全国至少有18个省市开展了这一工作.有的省已做到地县一级,如陕西省各县结合土壤普查进行微量元素调查,目前已有三分之一以上的县完成了样品分析任务.这样大规模的调查在我国还是第一次,它对微肥的生产与施用无疑将起推动作用.从我们接触到的情形来看,这一工作也出现一些问题,如有的样品缺乏代表性,分析结果不能说明问题;样品处理不当受了污染;分析过程中未掌握好测定条件,影响了精度;
In recent years, the survey of soil trace elements in China has been progressing rapidly, at least 18 provinces and cities nationwide to carry out this work.Some provinces have done at the county level, such as Shaanxi Province, the county combined soil survey trace elements survey, At present, more than one third of the counties have completed the tasks of sample analysis. For the first time in China, this large-scale survey will undoubtedly promote the production and application of micronutrients. From what we have come to see , Some problems also appeared in this work, such as the lack of representative samples, the analysis results can not explain the problem; improper handling of the sample contaminated; the analysis did not grasp the measurement conditions, affecting the accuracy;