organic matter and humic fractions of a haplic acrisol as affected by composted pig slurry
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2016
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Abstract
The goal of this study was to investigate the effect of composted pig slurry (PS) on the organic matter concentration and distribution of humic acid (HA), fulvic acid (FA) and humin (HU) fractions. The fractions were quantified following the addition of composted PS to the soil, which was produced with no acidification (T2) or with acidification with H3PO4 (T3); and in soil without compost addition (T1). The HA chemical composition was analyzed by FTIR spectroscopy. The addition of the two composts did not change the soil carbon concentration but affected the distribution of the humic fractions. For the three treatments, the carbon concentration of humic substances increased until 52 days following compost addition, with more pronounced increases with the addition of non-acidified PS compost (14.5 g kg-1) and acidified PS compost (15.1 g kg-1). This increase was reflected in both the FA and HA concentrations. The addition of compost with PS acidification resulted in the formation of larger humic micelles (HA) with higher aromatic content and fewer functional groups than the non-acidified PS compost. These findings, together with a lower proportion of carbohydrate-type structures, indicated the presence of more stable humic micelles in the soil treated with acidified PS compost.
| Reference Key |
ldtke2016qumicaorganic
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|---|---|
| Authors | ;Ana Cristina Lüdtke;Deborah Pinheiro Dick;Celso Aita;Bruno Pavan;Luiza Morosino;Alexandre Doneda;Rafael Ricardo Cantú |
| Journal | greece and rome |
| Year | 2016 |
| DOI |
10.5935/0100-4042.20160001
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| URL | |
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