Distribution and forms of manganese in vertisols of Serbia

Distribucija i forme mangana u vertisolima Srbije

Srpsko hemijsko društvo, Beograd 2011

Soil samples taken from the Ap horizont of arable land and meadows at ten different localities were analyzed for different forms of manganese, including total (HF), pseudo-total (HNO3), 0.1 M HCl-extractable and diethylentriaminepentaacetic acid (DTPA)-extractable. A sequential fractional procedure was used for Mn portioning into fractions: water soluble and exchangeable Mn (I), specifically adsorbed Mn with carbonates (II), reductant releasable Mn in oxides (III), Mn bonded with organic matter (IV) and Mn structurally bonded in silicates (residual fraction) (V). Serbian vertisols have a normal Mn content, comparable with similar soils. The total (HF) and pseudototal (HNO3) Mn contents were not correlated with soil properties, whereas the humus content positively influenced the 0.1 M HCl-extractable Mn in soil (r = 0.49). Soil pH and CaCO3 (r = 0.57 and 0.43) showed significant negative correlations with the DTPA-extractable Mn, respectively. The different extraction methods showed similar patterns of Mn content in arable and meadow soils. The sequential fractional procedure showed that reductant releasable Mn occluded in oxides of Fe and Mn was the prevailing Mn fraction in soil, however, water soluble and exchangeable Mn and Mn bonded with organic matter had significant correlations with most of the examined soil characteristics. Potential Mn toxicity in vertisols could be observed under lower pH and saturated conditions.
U cilju određivanja različitih oblika mangana u vertisolima sa područja Srbije (oranice i livade) poreklom sa deset različitih lokaliteta analiziran je ukupan sadržaj mangana (HF), pseudo-ukupan sadržaj (HNO3), 0,1 M HCl rastvorljiv i DTPA rastvorljiv mangan. Sekvencijalnom ekstrakcijom izvršeno je razdvajanje frakcija mangana na rastvorljiv u vodi i razmenljiv mangan (I), specifično adsorbovan sa karbonatima (II), okludovan u oksidima (III), mangan vezan za organsku materiju (IV) i mangan strukturno vezan u silikatima (rezidualni deo) (V). Sadržaj mangana u analiziranom zemljištu (vertisol) poređen je sa dobijenim rezultatima na sličnim zemljištima. Ukupan sadržaj mangana (HF) i pseudo-ukupan sadržaj (HNO3) nisu bili u korelaciji sa ispitivanim svojstvima zemljišta, dok je sadržaj humusa pozitivno uticao na 0,1 M HCl rastvorljiv mangan(r = 0,49). Zemljišni pH i CaCO3 (r = 0,57 i 0,43) su pokazali visoko značajnu negativnu korelaciju sa DTPA rastvorljivim manganom. Različita ekstrakciona sredstva su ispoljila sličan efekat na sadržaj Mn u obradivom zemljištu i livadama. Sekvenciona ekstrakciona analiza je pokazala da mangan okludovan u oksidima čini procentualno najveću frakciju u zemljištu, istovremeno postoje statistički značajne korelacije između mangana rastvorljivog u vodi i mangana vezanog za organsku materiju i većine svojstava zemljišta. Potencijal ekotoksičnosti mangana se može ispoljiti samo u slučajavima niske pH vrednosti zemljišta i pojave zasićanja zemljišta sa vodom.

soil; manganese solubility; plant availability; adsorption; distribution of manganese; article

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https://creativecommons.org/licenses/by-nc-nd/4.0
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Journal of The Serbian Chemical Society

RSPST oai:fiver.ifvcns.rs:123456789/1014
0352-5139
https://fiver.ifvcns.rs/handle/123456789/1014
10.2298/JSC101229103M
2-s2.0-80051915759
000294746200011
1249195880

UIVERSITY OF BELGRADE
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