In the production of organic vegetables, the types of fertilizers that can be used are: farmyard manure after harmless treatment at high temperature according to the requirements of organic agricultural production standards, such as compost, manure, biogas fertilizer, crop straw, mud fertilizer, cake fertilizer, etc.; Bacterial fertilizers, such as humic acid fertilizers, rhizobia fertilizers, compound microbial fertilizers, etc.; green manures, such as grass mulberry, milk vetch, alfalfa, etc.; grass ash, etc.; decomposed mushroom culture wastes and barium culture media; mineral fertilizers, Including potassium ore powder, phosphate rock powder, calcium chloride and other substances. Also included are organic special fertilizers and some microbial fertilizers certified by organic certification bodies.
Fertilizers for humus use include humic acid fertilizers, microbial fertilizers, and special fertilizers for other biological foliage.
Chemical synthetic fertilizers are not allowed in the production of organic vegetables; the use of human excreta should be restricted in the cultivation of organic vegetables.
Chemical Reagent is the relative reference material for chemical research and component analysis. It is an important condition for scientific and technological progress. It is widely used in the synthesis, separation, qualitative and quantitative analysis of substances.
Early chemical reagents simply meant "pure chemicals used in chemical analyses and tests for the purpose of determining the composition or composition of substances". Later it was extended to "a chemical used for the purpose of a chemical reaction", and the term "chemical reagent" refers to a chemical that has long gone beyond this category. Some people think that "chemicals used in scientific experiments" can be called "chemical reagents". A more comprehensive definition of a chemical reagent may be a compound or element of various purity grades used in chemical tests, chemical analyses, chemical studies, and other tests.
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