灼烧法和重铬酸钾容量法测定有机肥有机物总量/有机质含量对比研究OA

Organic matter content,as an important source of nutrients in organic fertilizers,is a crucial technical indicator for evaluating the quality of organic fertilizers.This article takes commercially available organic fertilizers as the research object,and employs the ignition method and potassium dichromate volumetric method to detect the total organic matter/or-ganic matter content of organic fertilizers,respectively,to compare the differences in the total organic matter/organic matter content obtained by different detection methods.The results indicate that the average value of the total organic matter(on a dry basis)of organic fertilizers tested by the ignition method is 26.0％,with a relative standard deviation of 1.53％;the average value of the organic matter content of organic fertilizers tested by the potassium dichromate volumetric method is 22.8％,with a relative standard deviation of 0.37％.The relative standard deviations of the results obtained by the two an-alytical testing methods are both less than 5％,and the absolute difference is 3.2％.This study aims to explore the differ-ences in detecting the total organic matter/organic matter content of organic fertilizers using the ignition method and potassi-um dichromate volumetric method through experiments.By testing the total organic matter/organic matter content,analyzing the physicochemical properties of organic fertilizers,and evaluating the organic matter content of organic fertilizers,this study provides a theoretical basis for improving the utilization rate of organic fertilizers and promoting sustainable agricultur-al development.