Influence of Particle Size Distribution of Soil on Quantity and Quality of Soil Organic Matter | Vplyv zrnitostného zloženia pôdy na kvantitu a kvalitu pôdnej organickej hmoty
2012
Tobiašová, E., Slovenská poľnohospodárska univ., Nitra (Slovak Republic), Fakulta agrobiológie a potravinových zdrojov, Katedra pedológie a geológie | Debska, B. | Banach-Szott, M.
Influence of particle size distribution of soil on the carbon and nitrogen contents and fractional composition of humus substances was studied in different soil types (Eutric Fluvisol, Haplic Chernozem, Haplic Luvisol, Eutric Regosol). The variants include soils of forest ecosystem (control) and agro-ecosystem with 4 crop rotations. The particle size distribution of soil influenced the content and quality of soil organic matter. It was noted that, the higher proportion of smaller fraction (lt 0.001 mm) supported, the higher content of soil organic matter (r = 0.794; P lt 0.01) subjected to smaller changes (r = 0.551; P lt 0.05). Higher content of size fraction lt 0.001 mm supported higher stability of humus substances (r = -0.755; P lt 0.01) and humic acids (r = -0.533; P lt 0.05). The humic acids bound with mineral components and stabile R2O3 were dominated. In contrary, higher content of size fraction (0.05 - 0.25 mm) contributed higher content of fulvic acid bound with mobile R2O3 and higher content of free fulvic acids. Higher content of organic matter was in forest ecosystem, but its quality was better in arable land.
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