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磴口县从2007年开始实施全国测土配方施肥项目。有机质含量是土壤养分与肥力高低的重要指标之一。为了解土壤养分状况,理化性状,科学制定种植结构,确定合理的施肥方法,施肥种类及搭配标准,我们进行了土壤有机质的测定工作。测试土样6000多个。采用方法为油浴加热重铬酸钾氧化——容量法。其主要原理是:在加热条件下,用过量的重铬酸钾-硫酸溶液氧化土壤有机碳,多余的重铬酸钾用硫酸亚铁铵标
Laokou County since 2007 the implementation of the national soil testing and fertilizer project. Organic matter content is one of the important indicators of soil nutrient and fertility. In order to understand the status of soil nutrients, physical and chemical properties, scientifically formulate planting structure, determine reasonable fertilization methods, fertilization types and matching standards, we conducted soil organic matter determination. Test more than 6000 soil samples. Adopting the method of oil bath heating potassium dichromate oxidation - volumetric method. The main principle is: under the conditions of heating, with excessive potassium dichromate - sulfuric acid solution of soil organic carbon, potassium dichromate excess with ammonium ferrous sulfate standard