What is the effect of fertilizer synergist?

What is the effect of fertilizer synergist? What should I pay attention to when buying fertilizer synergists? Also ask the netizens who know to help introduce because the fertilizer synergist contains rich and high-value active bacteria, which has the functions of fixing nitrogen, dissolving phosphorus and releasing potassium. However, fertilizer synergist is a new thing in the fertilizer industry, like high-tower granulation, slow and controlled release fertilizer and other new fertilizers, but also to meet the requirements of the country to improve fertilizer use efficiency and develop modern agriculture. Therefore, the farming network has sorted out the main role of fertilizer synergist, which is listed below for netizens' reference. The function of fertilizer synergist: first, fertilizer synergist is mainly composed of essential trace elements for crops, combined with urease inhibitors, ammonia stabilizers, and biological agents, pesticides and plant production promoters. Effect 2. Microbial organic fertilizer synergist combined with all kinds of organic fertilizer and farm manure can significantly improve the utilization rate of fertilizer, meet the nutrient needs of crops in each growth stage, and fundamentally improve the soil environment. Third, fertilizer synergist can also promote the reproduction of beneficial microorganisms, produce rich metabolites and other active substances, strongly promote root growth, form protective film, conserve water and fertilizer, enhance plant root absorption capacity, stem diameter, seedling strength, and fundamentally increase yield. Effect 4. The synergist of microbial organic fertilizer can comprehensively increase the utilization rate of nitrogen, phosphorus and potassium by about 20% through the synergistic effect of trace elements, urease inhibitors and biological agents, and prolong the efficiency of nitrogen fertilizer in 90-120 days. Note: there are dozens of product production enterprises marked with "fertilizer synergist" or "synergistic" function on the market, but the technical standards adopted are quite different, leaving grass-roots fertilizer dealers and farmers at a loss as to what to do. Therefore, regular fertilizer synergist production enterprises call on the state to issue fertilizer synergist industry standards as soon as possible, so as to standardize the development of the industry. What is potassium nitrate? what kind of fertilizer can't be used as fertilizer?