Obtaing Organomineral Fertilizers on Base of Local Raw Materials and Nitrogen-fixing Microorganisms

The article presents results of research on the production of organomineral fertilizers based on local raw materials cattle manure (CM), Kyzylkum phosphorite flour (FF) and Navbahor bentonite (NB) and nitrogen-fixing microorganisms (NFM). CM: NB: NFM=100.0: 2.5: (0-4) and CM: NB: FF: NFM= 100.0: 5.0: 2.5: (0-4) in obtaining new types of organomineral fertilizers ratios are used. Composting time is taken from 1 day to 60 days. The physico-chemical and commercial properties of the obtained new type of organomineral fertilizers were studied. The contents of organomineral fertilizer samples were analyzed by modern physico-chemical methods.

Composting local ores (FU and NB) with cattle manure and processing the resulting mixture with a solution containing nitrogen-fixing microorganisms led to an increase in humic substances, a plant-available form of phosphorus and, most importantly, an increase in nutrient components. Determined that the amount of nitrogen in the organomineral fertilizer obtained due to the biofixation of atmospheric molecular nitrogen is 3.2-4.1 times higher than in the case where NFM was not applied.