NIU Hong-hong,MENG Fan-lei,ZHANG Guo-hui,et al.Evaluation of Uncertainty of Determination of Available Phosphorus in Soil[J].HEILONGJIANG AGRICULTURAL SCIENCES,2016,(07):38-40.[doi:10.11942/j.issn1002-2767.2016.07.0038]
土壤中有效磷测定不确定度评定
- Title:
- Evaluation of Uncertainty of Determination of Available Phosphorus in Soil
- 文章编号:
- 1002-2767（2016）07-0038-03
- Keywords:
- soil; availablephosphorus; evaluation of uncertainty
- 分类号:
- S158.2
- 文献标志码:
- A
- 摘要:
- 为提高土壤有效磷测定结果的质量水平，以北方常见的石灰性土壤为例，采用碳酸氢钠浸提、硫酸钼锑抗显色法，依据( NY/T 148-1990《石灰性土壤有效磷测定方法》),(JJG178-2007《分光光度计》)，建立数学模型，确定测量不确定度的因素，评估各个不确定度分量,给出该方法测定土壤中有效磷含量的标准合成不确定度及扩展不确定度。结果表明：当置信概率p=0.95时，扩展不确定度0.43 mg·kg-1（k=2）。
- Abstract:
- In order to improve the level of the determination results of available P in soil,taking the common calcareous soil in north,using sodium bicarbonate extraction and acid molybdenum antimony chromogenic method,mathematics model was built,measurement uncertainty elements was identified,evaluate uncertainty degree and compound and extension uncertainties of available phosphorus content were evaluated according to (NY/T 148-1990 determination method of available phosphorus in calcareous soil) and (JJG178-2007 Spectrophotometer); The results showed that when p=0.95,extension uncertainty was 0.43 mg·kg-1（k=2）.
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备注/Memo
收稿日期：2016-05-23