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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Nitrification inhibitors effectively target N2O-producing Nitrosospira spp. in tropical soil

Texto completo
Autor(es):
Cassman, Noriko A. [1] ; Soares, Johnny R. [1, 2] ; Pijl, Agata [1] ; Lourenco, Kesia S. [1, 2] ; van Veen, Johannes A. [1] ; Cantarella, Heitor [2] ; Kuramae, Eiko E. [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Netherlands Inst Ecol NIOO KNAW, Dept Microbial Ecol, Wageningen - Netherlands
[2] Agron Inst Campinas, Soil Sci & Fertil, Soil & Environm Resources Ctr, POB 28, BR-13012970 Campinas, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: ENVIRONMENTAL MICROBIOLOGY; v. 21, n. 4, p. 1241-1254, APR 2019.
Citações Web of Science: 0
Resumo

The nitrification inhibitors (NIs) 3,4-dimethylpyrazole (DMPP) and dicyandiamide (DCD) can effectively reduce N2O emissions; however, which species are targeted and the effect of these NIs on the microbial nitrifier community is still unclear. Here, we identified the ammonia oxidizing bacteria (AOB) species linked to N2O emissions and evaluated the effects of urea and urea with DCD and DMPP on the nitrifying community in a 258 day field experiment under sugarcane. Using an amoA AOB amplicon sequencing approach and mining a previous dataset of 16S rRNA sequences, we characterized the most likely N2O-producing AOB as a Nitrosospira spp. and identified Nitrosospira (AOB), Nitrososphaera (archaeal ammonia oxidizer) and Nitrospira (nitrite-oxidizer) as the most abundant, present nitrifiers. The fertilizer treatments had no effect on the alpha and beta diversities of the AOB communities. Interestingly, we found three clusters of co-varying variables with nitrifier operational taxonomic units (OTUs): the N2O-producing AOB Nitrosospira with N2O, NO3-, NH4+, water-filled pore space (WFPS) and pH; AOA Nitrososphaera with NO3-, NH4+ and pH; and AOA Nitrososphaera and NOB Nitrospira with NH4+, which suggests different drivers. These results support the co-occurrence of non-N2O-producing Nitrososphaera and Nitrospira in the unfertilized soils and the promotion of N2O-producing Nitrosospira under urea fertilization. Further, we suggest that DMPP is a more effective NI than DCD in tropical soil under sugarcane. (AU)

Processo FAPESP: 13/50365-5 - Microbial networks in control of greenhouse gases emissions in biobased agriculture - MiniBag
Beneficiário:Heitor Cantarella
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Regular