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Effect of Organic Matter on Manganese Solubility
- Source :
- Brazilian Archives of Biology and Technology, Vol 45, Iss 1, Pp 17-20 (2002), Brazilian Archives of Biology and Technology, Volume: 45, Issue: 1, Pages: 17-20, Published: MAR 2002, Brazilian Archives of Biology and Technology v.45 n.1 2002, Brazilian Archives of Biology and Technology, Instituto de Tecnologia do Paraná (Tecpar), instacron:TECPAR
- Publication Year :
- 2002
- Publisher :
- Instituto de Tecnologia do ParanĂ¡ (Tecpar), 2002.
-
Abstract
- The objective of this study was to re-evaluate some aspects of the relative importance of organic matter on Mn solubility in acid soil conditions. Field study showed that black oats, oil seed radish, elephant grass, lupin, leucaena, and coffee leaves serving as mulch decreased Mn solubility as compared with bare soil. The decrease in Mn solubility with plant mulch was related to increase in soil moisture content. Laboratory study showed that increasing temperature from 25 to 100ºC increased Mn solubility and total soil organic carbon was little changed; from 150 to 200ºC increased both Mn solubility and organic carbon oxidation, and up to 300ºC decreased Mn solubility and stoped organic carbon oxidation . Aluminum solubility always increased with increasing temperature. Organic matter exerted a control in both Mn and Al solubilities in acid soils.O estudo foi conduzido com objetivo de reavaliar alguns aspectos da importância relativa da matéria orgânica na solubilidade do Mn em solos ácidos. Em condição de campo cobertura morta com resíduos de aveia preta, nabo forrageiro, napier, tremoço, leucena e folhas de café diminuíram a solubilidade de Mn quando comparada com o solo descoberto. A redução na solubilidade do Mn em solo coberto com resíduos vegetais foi relacionada com o teor de umidade do solo. Estudos de laboratório demonstraram que o aumento da temperatura de 25 para 100ºC aumentou a solubilidade do Mn com pouca alteração no teor de carbono do solo; de 150 a 200ºC aumentou ambas a solubilidade do Mn e a oxidação do carbono orgânico e acima de 300ºC diminuiu a solubilidade do Mn e completou a oxidação do carbono orgânico. A solubilidade do Al sempre aumentou com a elevação da temperatura. A matéria orgânica influenciou diretamente a solubilidade do Mn e do Al.
- Subjects :
- chemistry.chemical_classification
Total organic carbon
Multidisciplinary
biology
mulch
organic carbon
lcsh:Biotechnology
food and beverages
chemistry.chemical_element
Soil carbon
Manganese
Plant residue
heavy metal
biology.organism_classification
Leucaena
chemistry
Environmental chemistry
lcsh:TP248.13-248.65
Soil water
micronutrient
Organic matter
Solubility
Mulch
Subjects
Details
- Language :
- English
- ISSN :
- 16784324 and 15168913
- Volume :
- 45
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Brazilian Archives of Biology and Technology
- Accession number :
- edsair.doi.dedup.....7207f761d68113695435c31b1e328782