Evaluation of organic matter transformation during biotechnological processing of secondary raw materials for the production of granulated organomineral fertilizers
Abstract
The influence of straw, flax, and sawdust additives, as well as bio sludge from biogas plants on the transformation of organic matter during biotechnological processing has been studied. It is shown that the group composition of the studied mixtures changes with the increase of humic substances (HS) content by 3.5–39.8 % and decrease of difficult hydrolysable HS content by 35.0–79.9 % for all the studied compositions in comparison with the initial one. In the process of composting of mixtures, the content of water-soluble substances (WSS) decreased in variants with sawdust and straw by 15.3 and 3.9 %, and in variants with bio sludge and flax thistle the content of WSS increased by 18.3 and 1.8 %, respectively. For all investigated compositions, except for the variant with straw, the increase of humic acid (HA) content in aqueous extracts with increasing drying temperature of organomineral fertilizer granules is characteristic. The maximum HA content is observed in aqueous extracts of fertilizer granules based on compost with straw and amounts to 2.39 % of dry matter. In the variant with bio sludge, the content of HA in aqueous extracts was 1.37 and 1.85 % at the drying temperature of granules 90 and 110 ºC, respectively, which allows us to recommend the obtained biocomposts based on secondary raw materials for the production of granular organomineral fertilizers.
About the Authors
N. E. Sosnovskaya
Institute of Nature Management of the National Academy of Sciences of Belarus
Belarus
Belarus
Natalia E. Sosnovskaya – Ph. D. (Technical), Senior Researcher, Associate Professor
10, F. Scoriny Str., 220076, Minsk
V. A. Rakovich
Institute of Nature Management of the National Academy of Sciences of Belarus
Belarus
Belarus
Vyacheslav А. Rakovich – Ph. D. (Technical), Head of Lab. of Biogeochemistry and Agroecology
10, F. Scoriny Str., 220076, Minsk
O. G. Krasnoberskaya
Institute of Nature Management of the National Academy of Sciences of Belarus
Belarus
Belarus
Olga G. Krasnobreskaya – Ph. D. (Agricultural), Senior Researcher
10, F. Scoriny Str., 220076, Minsk
E. A. Dobrinets
Institute of Nature Management of the National Academy of Sciences of Belarus
Belarus
Belarus
Elena A. Dobrinets – Junior Researcher
10, F. Scoriny Str., 220076, Minsk
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Review
For citations:
Sosnovskaya N.E., Rakovich V.A., Krasnoberskaya O.G., Dobrinets E.A. Evaluation of organic matter transformation during biotechnological processing of secondary raw materials for the production of granulated organomineral fertilizers. Nature Management. 2025;(1):168-179. (In Russ.)
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