Published in Scientific Papers. Series A. Agronomy, Vol. LXVIII, Issue 2
Written by Maxim POPIRNY, Yevhen SKRYLNYK, Svіtlana KRYLACH, Angela KUTOVA, Oleksii SHOVKUN
Soil organic matter play crucial role in soil functions, physicochemical properties and structure stability, which determined main soil properties - fertility. The objective is to study transformation of the quality composition of organic matter of soddy-podzolic soil with the application of various fertilization systems in relation to deleted of nano-, micro-size particles distribution of alkali solutions of isolated humic acids (HAs) from soil. Via UV-visible spectroscopy and gel-permeation size-exclusion chromatograph, determined structural molecular complexity of isolated HAs and by dynamic light scattering and visual observing of dried drops of HA solutions was evaluate particles size of HA in solution at micro- and nano-level of secondary or colloid structural organization. Revealed relation between fraction compositions of organic matter that causing by fertilizer systems and molecular complexity with particles size distribution of isolated HA in alkali solution. We showed that under long-term application of mineral and organo-mineral fertilization systems significant increase ratio of small nanoparticles population and decrease of big microparticles in alkali HA solution of soddy-podzolic soil with highest degree of fulvatiozation.
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