Page 419 - Demo

SECTION II. APPLIED BIOTECHNOLOGY IN THE PHARMACEUTICAL INDUSTRY... 423When rice straw is processed with microbial preparations, it increases the content of nitrogen (N), phosphorus pentoxide (P2O5), and potassium oxide (K2O), reduces the carbon-to-nitrogen (C/N) ratio, and results in a higher nutrient content in the organic fertilizer. The organic fertilizer product, after being analyzed and evaluated for quality to ensure compliance with the prescribed parameters, will be supplemented and mixed with functional microbial preparations to increase the density of beneficial microorganisms in the fertilizer. The results of analyzing the density of beneficial microorganisms in the fertilizer after being mixed are shown in Table 4.Table 4. Density of Beneficial Microorganisms in Fertilizer After MixingNo Beneficial Microorganisms UnitResultQCVN 01-189: 2019/BNNPTNT After mixingAfter 3 months of mixing1Insoluble phosphate degrading microorganismCFU/g 5.2%u00d7106 2.4%u00d7106The density of each type of beneficial microorganism is greater than or equal to 1x106 CFU/g.2 Cellulose-degrading microorganisms CFU/g 4.1%u00d7106 2.5%u00d7106The results showed that after adding functional microorganisms to the organic fertilizer, the density of microorganisms reached above 106 CFU/g, even after 3 months of mixing. This value meets the requirements of Vietnamese standards for the quality of organic microbial fertilizer. Based on that, the research continues to conduct experiments to determine the impact of the mixing ratio between organic microbial fertilizer and sea sand on some crop yield indicators to determine the optimal mixing ratio.3.3. The impact of the mixing ratio between microbial organic fertilizer and seasand on the yield components of cropsFor the green mustards: