The effect of crop sequences on soil microbial, chemical and physical indicators and its relationship with soybean sudden death syndrome (complex of Fusarium species)

Authors
Pérez Brandán, Carolina; Arzeno, José Luis; Huidobro, Jorgelina; Conforto, Cinthia; Grümberg, Betiana; Hilton, Sally; Bending, Garry; Meriles, Jose Manuel; Vargas Gil, Silvina
Publication Year
2014
Language
English
Format
article
Status
Published version
Description
The effect of crop sequences on soil quality indicators and its relationship with sudden death syndrome (SDS, a complex of Fusarium species) was evaluated by physical, chemical, biochemical and molecular techniques. Regarding physical aspects, soybean/maize and maize monoculture exhibited the highest stable aggregate level, with values 41% and 43% higher than in soybean monoculture, respectively, and 133% higher than in bean monoculture. Bulk density (BD) was higher in soybean monoculture, being 4% higher than in bean monoculture. The chemical parameters organic matter, total N, P, K, Mg, Ca, and water holding capacity also indicated that soybean/maize and maize monoculture improved soil quality. Fungal and bacterial community fingerprints generated using Terminal Restriction Fragment Length Polymorphism analysis of intergenic transcribed spacer regions of rRNA genes and 16S rRNA genes, respectively, indicated a clear separation between the rotations. Fatty acid profiles evaluated by FAME showed that bean monoculture had higher biomass of Gram (+) bacteria and stress indicators than maize monoculture, while the soybean/maize system showed a significant increase in total microbial biomass (total FAMEs content) in comparison with soybean and bean monoculture. The incidence of SDS (Fusarium crassistipitatum) was markedly higher (15%) under soybean monoculture than when soybean was grown in rotation with maize. In the present work, soil microbial properties were improved under soybean/maize relative to continuous soybean. The improvement of soil health was one of the main causes for the reduction of disease pressure and crop yield improvement due to the benefits that crop rotation produces for soil quality.
Fil: Pérez Brandán, Carolina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Salta-Jujuy. Estación Experimental Agropecuaria Salta; Argentina
Fil: Arzeno, José Luis. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Salta-Jujuy. Estación Experimental Agropecuaria Salta; Argentina
Fil: Huidobro, Jorgelina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Salta-Jujuy. Estación Experimental Agropecuaria Salta; Argentina
Fil: Conforto, Cinthia. Instituto Nacional de Tecnologia Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Instituto de Patologia Vegetal; Argentina
Fil: Grümberg, Betiana. Instituto Nacional de Tecnologia Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Instituto de Patologia Vegetal; Argentina
Fil: Hilton, Sally. University of Warwick. School of Life Sciences; Reino Unido
Fil: Bending, Garry. University of Warwick. School of Life Sciences; Reino Unido
Fil: Meriles, Jose Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); Argentina; Argentina
Fil: Vargas Gil, Silvina. Instituto Nacional de Tecnologia Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Instituto de Patologia Vegetal; Argentina
Subject
SOIL MICROBIAL POPULATIONS
T-RFLP
FAME
SOYBEAN SUDDEN SYNDROME
Ciencias del Suelo
Agricultura, Silvicultura y Pesca
CIENCIAS AGRÍCOLAS
Access level
Open access
License
https://creativecommons.org/licenses/by/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/15156