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dc.contributor.author
Regehr, Alison
dc.contributor.author
Oelbermann, Maren
dc.contributor.author
Videla, Cecilia
dc.contributor.author
Echarte, Laura
dc.date.available
2018-05-18T20:59:57Z
dc.date.issued
2015-03
dc.identifier.citation
Regehr, Alison; Oelbermann, Maren; Videla, Cecilia; Echarte, Laura; Gross Nitrogen Mineralization and Immobilization in Temperate Maize-Soybean Intercrops; Springer; Plant and Soil; 391; 1-2; 3-2015; 353-365
dc.identifier.issn
0032-079X
dc.identifier.uri
http://hdl.handle.net/11336/45675
dc.description.abstract
Background and aims Reliance on nitrogen (N) fertilizers to maintain crop productivity requires a thorough understanding of the transformation of this nutrient within the soil-plant system. Organic matter input from a mixture of crop residues, such intercrop systems, influence N transformations differently compared to sole crops. We tested the hypothesis that N mineralization and immobilization differ between cereal-legume intercrops and sole crops. Methods A short-term experiment using 15N isotopic pool dilution was conducted in 2007 and 2012 in maize (Zea mays L.) and soybean (Glycine max L. Merr.) sole crops and 1:2 (1 row maize:2 rows soybean) and 2:3 (two rows maize:3 rows soybean) intercrops. Soil characteristics, gross mineralization and immobilization, and net immobilization to a 10 cm depth were quantified. Results Soil characteristics (pH, bulk density, soil organic carbon (C), total N, and C:N) were not significantly different (P < 0.05) among treatments, but differed significantly (P < 0.05) between years (2007 vs. 2012). Soil NH4 +-N was significantly lower (P < 0.05) in the maize sole crop. Gross N mineralization, immobilization and net immobilization, were significantly different (P < 0.05) among treatments and between years. Relative NH4 +-N immobilization was significantly different (P < 0.05) among treatments and between years, showing the lowest values in the intercrops. The amount of NH4 +-N mineralized per day was significantly greater (P < 0.05) in the 2:3 intercrop and was significantly different (P < 0.05) between years in the 2:3 intercrop. Residence time of NH4 +-N was significantly longer (P < 0.05) in the soybean sole crop and 1:2 intercrop followed by the 2:3 intercrop and the maize sole crop. Conclusions Intercropping contributed to the long-term immobilization of N and therefore was a more sustainable land-management practice than sole cropping. The adoption of cereal-legume intercrops will curb our currently growing reliance on N fertilizers.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Argentina Pampas
dc.subject
Cereal-Legume
dc.subject
Crop Residue
dc.subject
Isotope Techniques
dc.subject.classification
Agricultura
dc.subject.classification
Agricultura, Silvicultura y Pesca
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CIENCIAS AGRÍCOLAS
dc.title
Gross Nitrogen Mineralization and Immobilization in Temperate Maize-Soybean Intercrops
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-05-03T16:40:12Z
dc.journal.volume
391
dc.journal.number
1-2
dc.journal.pagination
353-365
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
Fil: Regehr, Alison. University of Waterloo; Canadá
dc.description.fil
Fil: Oelbermann, Maren. University of Waterloo; Canadá
dc.description.fil
Fil: Videla, Cecilia. Universidad Nacional de Mar del Plata; Argentina
dc.description.fil
Fil: Echarte, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina
dc.journal.title
Plant and Soil
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11104-015-2438-0
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s11104-015-2438-0
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