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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Shifting abundances of communities associated with nitrogen cycling in soils promoted by sugarcane harvest systems

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Rigotto, A. [1] ; Cotta, S. R. [2, 1] ; Dias, A. C. F. [1] ; Carvalho, J. L. N. [3] ; Andreote, F. D. [1]
Total Authors: 5
[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Soil Sci, BR-13400970 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Ctr Nucl Energy Agr, Piracicaba, SP - Brazil
[3] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Biorenewables Natl Lab LNBR, Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Letters in Applied Microbiology; JUL 2020.
Web of Science Citations: 0

Sugarcane cultivation supports Brazil as one of the largest world sugar and ethanol producer. In order to understand the impact of changing sugarcane harvest from manual to mechanized harvest, we studied the effect of machinery traffic on soil and consequently soil compaction upon soil microbial communities involved in nitrogen cycling. The impact of sugarcane harvest was dependent on soil depth and texture. At deeper soil layers, mechanized harvesting increases the abundance of nitrogen fixers and denitrifying communities (specificallynosZ clade I and II) while manual harvesting increases the abundance of ammonia oxidizers (specifically AOA) and increases denitrifying communities (nosZ clade I and II) on top and at intermediate depth. The effect of change on the harvest system is more evident on sandy soil than on clay soil, where soil indicators of compaction (bulk density and penetration resistance) were negatively correlated with soil microorganisms associated with the nitrogen cycle. Our results point to connections between soil compaction and N transformations in sugarcane fields, besides naming biological variables to be used as proxies for alterations in soil structure. (AU)

Grantee:Simone Raposo Cotta
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/50353-7 - Microbial consortia for biowaste management: life cycle analysis of novel strategies of bioconversion (MICROWASTE)
Grantee:Fernando Dini Andreote
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants