Research on the Determination Method of Soluble Salt Conductivity of Organic Fertilizers and Their Raw Materials
In order to investigate the effect of different testing environments and conditions on the determination of soluble salt conductivity(EC)of organic fertilizers and production materials,experimental studies are conducted using different types of organic fertilizers as well as the production materials.The results show that there is a positive linear correlation between the sample weighing amount and the EC value measurement results,which has the greatest impact on the determination of EC value.The sample extraction temperature and extraction solution separation method have no significant effect on the determination of EC value.The oscillation time and sample extraction solution placement time have a significant impact on the determination of EC value,but the range and relative range between treatments are relatively small.The conditions for determining the EC value of organic fertilizers and production raw materials are:weighing 5.0-10.0 g,oscillation time 30-60 minutes,the separation method of the extraction solution can be selected according to the actual situation,filter paper filtration or centrifugal separation,the surrounding temperature for measurement is 25℃and the extracted sample is set for 30 minutes before detection.
organic fertilizerproduction raw materialsoluble salt conductivityinfluencing factortest analysis
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