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Effect of safety of raw materials and excipients on microbial fertilizer

2021-12-20

  Organic fertilizer raw material
Raw materials and excipients play an important role in maintaining the survival, efficacy and safety of microorganisms in products, and they are also one of the main components of products.
The raw materials and auxiliary materials used in the production of biological fertilizer should meet the following requirements: the wastes of livestock and poultry, animal and plant residues and the waste materials processed with animal and plant products as raw materials can be used as raw materials and auxiliary materials for the production of microbial fertilizers only after they are fermented and decomposed and meet the requirements of harmless treatment; It is not suitable to use mineralized carbon such as fly ash and chemically synthesized carbon materials such as waste plastic powder to produce biological fertilizer; It is also not suitable to use raw materials with potential biological safety risks, such as antibiotic industrial waste residue with rich protein content, which will induce the breeding of drug-resistant bacteria in the field. Enterprises are required to use raw materials and excipients in accordance with regulations, which should be clearly defined when applying for product registration, and dynamically tracked by the registration department, so as to avoid potential safety hazards caused by excessive contents of heavy metals, pathogens and antibiotics in raw materials and accessories.
More than 95% ~ 98% of microbial fertilizer products are carrier materials such as raw materials and auxiliary materials. It's about products
At present, the raw materials and auxiliary materials used in the production of microbial fertilizer are various. In addition to the traditional agricultural wastes such as fermented livestock manure and straw, the leftovers of monosodium glutamate factory, sugar industry and paper industry, domestic waste, municipal sludge, bentonite, diatomite, coal powder, lignite, nutrient soil, etc. are complex in composition, and heavy metals, heavy metals, and other heavy metals are present in these wastes Pathogens, antibiotic residues and other security risks.
At present, the content of heavy metals has caused widespread concern in the society, especially in edible agricultural products. It is necessary to pay more attention to the rapid increase of soil heavy metal content caused by the large amount of organic fertilizer containing high heavy metals. The microorganism in the production of microbial fertilizer is safe, and the hidden danger of microbial fertilizer is often caused by the lack of strict control of raw materials and auxiliary materials.
Quality safety and effect assurance are very important because they are not only carriers, but also "food" of microorganisms. It not only provides materials for producing microorganisms and their metabolites, but also provides energy for microbial growth, metabolism and reproduction. Specifically, microorganisms can proliferate in large quantities only when they have available organic sources, and have the energy of metabolism, nitrogen fixation and activation of potassium and phosphorus minerals; Only in this way can the active substances such as polysaccharides, amino acids and biological hormones be synthesized, and the soil aggregate structure with the functions of maintaining fertilizer, water and ventilation can be formed.
Good organic materials can be decomposed by microbial fermentation, and the carbon source contained in the organic matter is usually called fermentable carbon. The organic matter carrier (fermentable carbon) which can be decomposed by microorganisms is directly related to its source. Therefore, it is necessary to clarify the sources and types of organic carriers used in microbial fertilizer, such as raw materials and auxiliary materials, so as to facilitate the supervision of their safety; On the contrary, the microbial fertilizer made of bentonite, diatomite, fly ash and other inorganic materials as carriers (or adsorbents) has a slow performance and even no significant fertility, which is due to the lack of organic carrier (fermentable carbon) for bacterial growth.

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