NEW KAZAKHSTAN BROWN COAL-BASED HUMIC FERTILIZERS ENRICHED WITH NATURAL BIACTIVE SUBSTANES: PRODUCTION, PROPERTIES AND GROWTH-PROMOTING ACTIVITY

Abstract

A method for production of new liquid humic organic-mineral fertilizer (NOF) on the basis of combined feedstock – brown coal and biohumus (vermicompost) – has been developed. The new fertilizer was produced by mixing alkaline extract of brown coal and vermicompost and adding carbamide and Trilon B. The product was researched using physical-and-chemical and spectral methods. Infrared and Raman spectra of the product were researched. Infrared spectra show typical humic acid absorption bands. However, NMR spectroscopy methods proved to be most informative. NMR-13С and NMR-1Н methods have revealed a typical group composition of the product. It has been demonstrated that the method proposed for production of liquid humic fertilizer makes it possible to combine benefits of coal humates and biohumus- or peat-based liquid humic fertilizers in one product. The standard tests used for determination of germinating ability of seeds of crops according to state standards GOST 12038-84andGOST R 54221-2010 showed a high growth promoting activity of the produced liquid fertilizer. Efficiency of the new organic-mineral fertilizer on vegetables and grain crops was tested in field. It has been established that the use of the new fertilizer results in increased yield of grain crops by 4.2-4.7 c/ha, and yield of vegetables – by 2.4-3.2 t/ha when using 0.25 – 0.3 l/ha of the product.

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