| 摘要 |
FIELD: agriculture.SUBSTANCE: invention relates to agriculture, in particular, to methods of producing humic preparations from coal for use thereof as organo-mineral fertilizers. Method involves superfine grinding a mixture of oxidized coal and sand in presence of an alkali metal hydroxide and a phosphorus-containing component. Grinding the mixture of coal and sand is carried out in ball mills for 2-4 minutes in air. Phosphorus-containing component used is ammonium dihydrogen phosphate NHHPO, the alkali metal used is solid potassium hydroxide KOH or sodium hydroxide NaOH, the additives used are sodium pyrophosphate NaPO, sodium percarbonate NaCO·1.5HOand unslaked lime CaO.EFFECT: invention provides a simple method of producing humic preparations with higher content of soluble humates in the ready product enriched with potassium, calcium, phosphorus and silicon.1 cl, 1 tbl, 5 ex |
