The Contemporary State of the Humus Nutrion of the Cambisols of Republic of Armenia

Kroyan, S.Z.

doi:10.19080/aibm.2018.11.555815

Cited by 2 publications

(1 citation statement)

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“…The authors showed that "humid climate of northern slopes leads to formation of brown type of humic acids (HA), while the conditions of eastern slopes assist to formation of gray HA". Moreover, for example: "Cambisols are characterized by dominance of fulvic acids (FA) above HA" regardless of the location: whether it is Jiguli Ridges in Samara Region of Russia (Abakumov et al, 2009) or Caucasus mountains of the Republic of Armenia (Kroyan, 2018).…”

Section: Introductionmentioning

confidence: 99%

Identification of humic substances on the transformation of an organic substrate

Безуглова¹,

Komarov²,

Komarov³

2022

Eurasian Journal of Soil Science (Ejss)

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The organic matter of the soil and humus are heterogeneous in composition. That is why the nature of soil organic matter has not yet been fully understood and causes many discussions. The purpose of this work is to study the identification features of humus in the process of peat's transformation. The results of a fiveyear experiment studying the processes of organic matter transformation in organic-mineral substrate based on peat growing coniferous seedlings in greenhouses are presented. In the dynamics of the group and fractional composition of humus for several years the biochemical essence of the humification process is revealed. To extract specific humic substances from the organogenic substrate, we used the method of fractioning humus into groups and fractions, which is a stepwise sequential extraction using solutions of sodium hydroxide and sulfuric acid. It was found that the organic matter of the substrate passes through three stages of transformation: hydrolysis of organic products → initial transformation → humification of lignin structures. There is a significant change in the ratio of the three main groups of humus in favor of humic acids at the third stage. In general, the system is tends to its most stable state: aromatic structures are copolymerized, the core of humic substances is densified, and humus gradually "matures".

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Section: Introductionmentioning

confidence: 99%