Page 414 - Demo

418 PROCEEDINGS OF INTERNATIONAL SCIENTIFIC CONFERENCE ON APPLIED BIOTECHNOLOGY2.2.4. Methods for Quality Control of Organic Microbial FertilizersThe quality of finished organic microbial fertilizer is assessed using the following indicators:No Indicator Analysis method1 Organic matter content TCVN 9294:2012 [11]2 Microorganisms decomposing insoluble phosphorusTCVN 6167:1996 [16]3 Cellulose-degrading microorganisms TCVN 6168:2002 [17]4 As TCVN 11403:2016 [18]5 Pb TCVN 9290:2018 [19]6 Hg TCVN 10676:2015 [20]7 Cd TCVN 9291:2018 [21]8 E. coli TCVN 6846:2007 [22]9 Salmonella TCVN 10780-1:2017 [23]2.2.5. Methods for determining the impact of fertilizer dosage on yield components of crops The experiment was conducted using the Randomized Complete Block (RCB) method, repeated three times on three plant species: green mustard, water spinach, and tomato. Each experimental pot weighed 30 kg (containing sea sand and organic microbial fertilizer). The experiments were supplemented with sea sand and organic microbial fertilizer according to the following formulas: Formula 1 (control): 30 kg sea sand; Formula 2: 20 kg sea sand + 10 kg organic microbial fertilizer (2:1 ratio); Formula 3: 15 kg sea sand + 15 kg organic microbial fertilizer (1:1 ratio); Formula 4: 10 kg sea sand + 20 kg organic microbial fertilizer (1:2 ratio). The material was moistened, and seeds were sown according to the specific instructions printed on the packaging for each plant species.