Influence of long-term flood with surface waters with high mineralization on group and fractional composition of the meadow soils humus

Уфимцева, Л. В.; Kalganov, A. A.

doi:10.1134/s199542551105016x

Cited by 5 publications

(1 citation statement)

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“…In the degradation process of SOM, the organic carbon is the main component to be studied, with two main fractions: non-humic substances (proteins, carbohydrates, resins and lignins) that correspond to 10–15% of total carbon, and humic substances (humic acids, fulvic acids and humin) ( Wolf et al , 2005 ). It is believed that humic substances are the main indices of soil fertility influencing crop productivity ( Ufimtseva and Kalganov, 2011 ). An increase in the concentration of humic acid by 11–28%, has been reported after the incorporation into the soil of various cover crops ( Arlauskiene et al , 2010 ).…”

Section: Introductionmentioning

confidence: 99%

Humic fractions of forest, pasture and maize crop soils resulting from microbial activity

Tavares

Nahas

2014

Braz. J. Microbiol.

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Humic substances result from the degradation of biopolymers of organic residues in the soil due to microbial activity. The objective of this study was to evaluate the influence of three different ecosystems: forest, pasture and maize crop on the formation of soil humic substances relating to their biological and chemical attributes. Microbial biomass carbon (MBC), microbial respiratory activity, nitrification potential, total organic carbon, soluble carbon, humic and fulvic acid fractions and the rate and degree of humification were determined. Organic carbon and soluble carbon contents decreased in the order: forest > pasture > maize; humic and fulvic acids decreased in the order forest > pasture=maize. The MBC and respiratory activity were not influenced by the ecosystems; however, the nitrification potential was higher in the forest than in other soils. The rate and degree of humification were higher in maize soil indicating greater humification of organic matter in this system. All attributes studied decreased significantly with increasing soil depth, with the exception of the rate and degree of humification. Significant and positive correlations were found between humic and fulvic acids contents with MBC, microbial respiration and nitrification potential, suggesting the microbial influence on the differential formation of humic substances of the different ecosystems.

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Section: Introductionmentioning

confidence: 99%

Humic fractions of forest, pasture and maize crop soils resulting from microbial activity

Tavares

Nahas

2014

Braz. J. Microbiol.

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Coupling effect of high temperature and thermophilic bacteria indirectly accelerates the humification process of municipal sludge in hyperthermophilic composting

Zhu

Yao

et al. 2022

Process Safety and Environmental Protection

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Change and spatial variability of soil organic matter humification after long-term tillage and olive mill wastewater application in arid regions

et al. 2020

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The changes of soil organic matter (SOM) humification induced by long-term combination of tillage and olive mill wastewater (OMW) application compared to natural and cultivated soil have been little investigated. This study aimed to compare effects of no cultivation with natural vegetation soil (NC), tillage (CT1) for 80 years and combination of tillage with OMW application (CT2) for 20 years on SOM humification degree. Fluorescence spectroscopy and UV-visible ratios (E4/E6 and CHA/CFA) were used to study soil humic acids (HAs). The SOM and humification distribution was determined for the whole field area using the Inverse Distance Weighting method. Results showed that SOM content, fluorescence emission area and E4/E6 and CHA/CFA ratios were higher in NC. Tillage reduced SOM amount, molecular size, aromatic condensation and humification degree as shown by the strong correlation between fluorescence area and CHA/CFA ratio in CT1 conversely to E4/E6. Contradictory results between fluorescence emission area and E4/E6 ratio found in NC and CT1 indicated that E4/E6 ratio was not a reliable indicator of SOM humification degree. The SOM amount, CHA/CFA ratio and emission fluorescence area increased conversely to E4/E6 ratio in CT2. This revealed a greatly humified organic matter and aromatic structure condensation with tillage and OMW application. Spatial distribution showed a progressive increase of SOM and CHA/CFA from north-west to south-east linked to the positive relationship between CHA/CFA ratio and SOM amount independent of soil management practices. Soil amended with OMW provided a favourable environment for the development of HAs which improved soil quality. The UV-visible ratio CHA/CFA with fluorescence emission area can be used as parameters to investigate SOM humification degree.

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Influence of long-term flood with surface waters with high mineralization on group and fractional composition of the meadow soils humus

Cited by 5 publications

References 0 publications

Humic fractions of forest, pasture and maize crop soils resulting from microbial activity

Humic fractions of forest, pasture and maize crop soils resulting from microbial activity

Coupling effect of high temperature and thermophilic bacteria indirectly accelerates the humification process of municipal sludge in hyperthermophilic composting

Change and spatial variability of soil organic matter humification after long-term tillage and olive mill wastewater application in arid regions

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