Link between paddy soil mineral nitrogen release and iron and manganese reduction examined in a rice pot growth experiment
| Autor: | Mohammed Abdul Kader, Pascal Boeckx, Steven Sleutel, Toon Van Alboom, Mili Amena Begum, Eddy De Grave, Heleen Deroo, Sofie Pierreux, Masuda Akter |
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| Rok vydání: | 2018 |
| Předmět: |
Inceptisol
Soil Science chemistry.chemical_element 04 agricultural and veterinary sciences Soil carbon Manganese 010501 environmental sciences Vermiculite 01 natural sciences Nitrogen chemistry Environmental chemistry Soil water Dissolved organic carbon 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Clay minerals 0105 earth and related environmental sciences |
| Zdroj: | Geoderma. 326:9-21 |
| ISSN: | 0016-7061 |
| Popis: | Paddy soil indigenous N supply is often poorly related to N status and our aim was to assess its linkage to reduction of Fe3+ and Mn4+, primary terminal electron acceptors in submerged soils. Transplanted rice was grown in the greenhouse in four Bangladeshi paddy soils with distinct SOC to Feox ratio (1.6 to 4.9) for 72 days firstly under continuous and then intermittent flooding. Solution buildup rates of Fe2+ and Mn2+ in the first 2–3 weeks of flooding correlated negatively with soil organic carbon (SOC) to NH4-oxalate extractable Fe (Feox) and Mn (Mnox) ratios (p 50% of e− capture, though. Reduction of abundantly present octahedral Fe3+ in chlorites and vermiculite and their interstratified forms in these floodplain silty Inceptisols is hypothesized to also support microbial activity. Notwithstanding, a close temporal synergy existed between solution Fe and soil mineral N and their build-up rates were correlated (r: 0.77 to 0.90; p |
| Databáze: | OpenAIRE |
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