10个土壤有效态成分分析标准物质研制

Ten Reference Materials for Available Nutrients of Agricultural Soils

首批6个土壤有效态成分分析标准物质(GBW07412～GBW07417),在土壤地力评价和生态农业环境地球化学评价中发挥了重要作用,经十年广泛应用,现已用尽。为满足我国覆盖区多目标地球化学调查与评价及农业土壤地力调查与评价有效态化学成分测试质量监控的需求,2009年中国地质科学院地球物理地球化学勘查研究所研制了新系列土壤有效态成分分析标准物质(GBW07412a～GBW07417a,GBW07458～GBW07461)。该系列10个标准物质在原有6个样品采集地重新采集的基础上,新增的4个样品侧重于西部地区和石灰性土壤,使得新研制的有效态成分分析标准物质地域和土壤类型代表性更为广泛。有效态成分的浸提方法和浸提条件由农业部、国土资源部和中国科学院相关部门13家单位共同研讨,消除农林行业间个别项目分析方法的细微差异,与首批6个标准物质相比浸提方法、浸提条件与测试方法统一,定值成分全面,包括植物营养元素和重金属污染元素,定值项目达50项。

Six nutrient-doped soil samples,used as reference materials,were prepared in 1998 but have been used up in the past 10 years.They played an important role in evaluation of soil productivity and ecological geochemistry.To satisfy surveys and evaluations in multi-purpose regional geochemistry and agricultural soil productivity,a series of ten new reference materials（GBW07412a-GBW07417a,GBW07458-GBW07461） were collected from the main agricultural regions of China and prepared by the Institute of Geophysical and Geochemical Exploration（IGGE） at in 2009.Six of the ten samples were collected from the same sites as the six samples prepared in 1998,while the others four were collected from western China and calcareous.50 indices,including nutritious and heavy metal elements,have been certified for all ten materials.These reference materials are more comprehensive and have been more widely distributed than the materials prepared in 1998.Furthermore,to eliminate the influence of analytical method differences in some indices between agricultural and forestry departments,methods of analysis and pretreatment were comprehensively discussed and unified by 13 laboratories from Ministry of Agriculture,Ministry of Land and Resources and Chinese Academy of Sciences.