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Black carbon yields highest nutrient and lowest arsenic release when using rice residuals in paddy soils

DOI zum Zitieren dieses Dokuments: https://doi.org/10.1038/s41598-018-35414-3
URN to cite this document: urn:nbn:de:bvb:703-epub-4243-2

Title data

Schaller, Jörg ; Wang, Jiajia ; Islam, Md. Rafiqul ; Planer-Friedrich, Britta:
Black carbon yields highest nutrient and lowest arsenic release when using rice residuals in paddy soils.
In: Scientific Reports. Vol. 2018 (19 November 2018) Issue 8 . - No. 17004.
ISSN 2045-2322
DOI: https://doi.org/10.1038/s41598-018-35414-3

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Abstract

Rice straw increasingly remains on the fields for nutrient supply to the next generation of crop plants. It can be applied either fresh or after burning to black carbon or ash. A central concern during rice cultivation is accumulation of carcinogenic arsenic and the question arises how much rice straw application contributes to nutrient versus arsenic supply in paddy fields. Laboratory incubation experiments were performed to assess the effect of rice straw, black carbon and ash on element mobilization. Our experiments showed initially higher silicon and phosphorus release from black carbon compared to fresh straw amendments. However, more re-sorption to soil lead to finally slightly lower pore water concentrations for black carbon versus fresh straw amendments. Highest arsenic, iron, manganese and dissolved organic carbon concentrations were observed after fresh rice straw application. Black carbon and ash application lead to only minor increases of arsenic compared to controls without amendments. Overall, for silicon and phosphorus the soil acts as sink while for iron and arsenic it was the main source. In summary, burning of rice straw to black carbon prior to application seems to yield a high increase in desired nutrient and a decrease in undesired arsenic mobilization in paddy soils.

Further data

Item Type: Article in a journal
Keywords: Black carbon; arsenic release
DDC Subjects: 500 Science
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group > Professor Environmental Geochemistry - Univ.-Prof. Dr. Britta Planer-Friedrich
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group
Research Institutions
Research Institutions > Research Centres
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-4243-2
Date Deposited: 27 Feb 2019 15:09
Last Modified: 27 Feb 2019 15:09
URI: https://epub.uni-bayreuth.de/id/eprint/4243

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