Phosphorus cycling within soil aggregate fractions of a highly weathered tropical soil: A conceptual model
| Autor: | Astrid Oberson, Else K. Bünemann, Gina Garland, Sieglinde S. Snapp, Johan Six, Regis Chikowo, Emmanuel Frossard |
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| Rok vydání: | 2018 |
| Předmět: |
biology
Phosphorus Soil Science chemistry.chemical_element Sorption 04 agricultural and veterinary sciences 010501 environmental sciences Silt biology.organism_classification 01 natural sciences Microbiology Soil Cajanus Lixisol Agronomy chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Leachate Cycling 0105 earth and related environmental sciences |
| Zdroj: | Soil Biology and Biochemistry. 116:91-98 |
| ISSN: | 0038-0717 |
| DOI: | 10.1016/j.soilbio.2017.10.007 |
| Popis: | Effective use of soil phosphorus (P) for crop production requires an understanding of how P pools are stabilized and cycled within soil aggregates, rather than assuming that P dynamics, particularly organic P, closely follow those of C. The main goal of this study was to compare C and N cycling with P dynamics in soil aggregate fractions under two distinct crop species, maize (Zea mays) and pigeon pea (Cajanus cajan) in a highly-weathered Lixisol. We found that while C and N follow an open cycle, whereby C and N are mineralized from microaggregates during macroaggregate turnover and partially exit the soil system as gas and leachate, P has a relatively closed cycle, where most of the mineralized and solubilized P from microaggregates is lost from the plant-available pool via sorption to the unaggregated silt and clay-sized particles ( |
| Databáze: | OpenAIRE |
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