Microbial fertilizer testing

Microbial fertilizer is a product that uses the life activities of microorganisms to produce specific fertilizer effects on crops, and is a type of fertilizer used in agricultural production. It has a history of nearly 50 years in China, and the evolution of its name from rhizobial agents to bacterial fertilizers to microbial fertilizers has shown the gradual development of microbial fertilizers in China. Biofertilizer is a living fertilizer, and its function is mainly achieved through the metabolic activities of a large number of beneficial microorganisms it contains. Only when these beneficial microorganisms are in a state of vigorous reproduction and metabolism can material transformation and beneficial metabolic products be continuously formed. Therefore, the types and vitality of beneficial microorganisms in microbial fertilizers are the basis for their effectiveness, unlike other fertilizers that are based on the forms and quantities of major elements such as nitrogen, phosphorus, and potassium. Because microbial fertilizers are active agents, their fertilizer efficiency is closely related to the number, intensity, and surrounding environmental conditions of live bacteria, including temperature, water content, pH, nutritional conditions, and the repulsion of indigenous microorganisms living in the soil. Therefore, attention should be paid when applying them. Test Product: Microbial Fertilizer NY 227-94 Test Items and Standards: (1) Appearance Microbial Fertilizer NY 227-94 (4.1, 5.1) (2) Effective viable and mixed bacterial content Microbial fertilizer NY 227-94 (5.2) (3) Moisture content Microbial fertilizer NY 227-94 (5.3) (4) pH value Microbial fertilizer NY 227-94 (5.4) (5) Fineness Microbial fertilizer NY 227-94 (5.5) (6) Organic matter Microbial fertilizer NY 227-94 (5.6) (7) Mercury and compounds (calculated in Hg) Water quality - Determination of total mercury - Cold atomic absorption spectrophotometric method HJ 597-2011 (8) Cadmium and its compounds (calculated as Cd) - Determination of cadmium in water quality - Dithizone spectrophotometric method GB 7471-87 (9) Chromium and its compounds (calculated as Cr) - Determination of total chromium in water quality GB 7466-87 (10) Arsenic and its compounds (calculated as As) - Determination of total arsenic in water quality - Silver diethyldithiocarbamate spectrophotometric method GB 7485-87 (11) Lead and its compounds (calculated as Pb) Water quality - Determination of lead - Dithizone spectrophotometric method GB 7470-87 (12) Agricultural control standard for roundworm eggs and urban garbage GB 8172-87 (13) National standard for coliform value and food safety - Microbiological examination of food - Coliform count GB 4789.3-2010