Effect of complex nitrohumate fertilizer on the organic matter and biological activity of typical chernozem
2009
Azanova-Vafina, F.G. | Bagautdinov, F. Ya. | Galimzyanova, N.F. | Ismagilov, Z.I., Bashkir Research and Development Institute of Agriculture, Ufa (Russian Federation)
A vegetative experiment was performed on an open plot in the republic of Bashkortostan for 5 years. For the first two years wheat was grown, then for 1 year – sugar beet, the next two years the soil was held under dead fallow with periodical mulching. In different variants of the experiment complex nitrohumate fertilizer (CNF) was applied in an amount of 5 and 20 g/vessel against P50K50. The manure in an amount of 15 and 60 g/vessel or mineral fertilizer. Effected by CNF in the soils the total content of humus increased by 2-17% being in the control 10.5 g/100 g soil. An amount of freshly formed humic acids and water-soluble organic compounds. In the second year after the application of fertilizer the effect of CNF on the same parameters were much weaker. The velocity of prolonged producing carbon dioxide increased. It exceeded the control parameters by 25-26% at the beginning and in the middle of vegetation. The population of phosphate-dissolving, heterotrophic and oligonitrophilic bacteria was in the CNF variant high throughout 5 years of the experiment. The population of heterotrophs was particularly great. The minimum values of all mentioned groups of microorganisms were observed in the variant with application of a full mineral fertilizer.
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