Gross nitrogen mineralization and immobilization in temperate maize-soybean intercrops
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 dif...
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| Format: | Artículo |
| Language: | Inglés |
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Springer
2019
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| Online Access: | https://link.springer.com/article/10.1007/s11104-015-2438-0 http://hdl.handle.net/20.500.12123/4224 https://doi.org/10.1007/s11104-015-2438-0 |
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| author | Regehr, Alison Oelbermann, Maren Videla, Cecilia Echarte, Laura |
| author_browse | Echarte, Laura Oelbermann, Maren Regehr, Alison Videla, Cecilia |
| author_facet | Regehr, Alison Oelbermann, Maren Videla, Cecilia Echarte, Laura |
| author_sort | Regehr, Alison |
| collection | INTA Digital |
| description | 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. |
| format | Artículo |
| id | INTA4224 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | INTA42242019-01-08T11:57:14Z Gross nitrogen mineralization and immobilization in temperate maize-soybean intercrops Regehr, Alison Oelbermann, Maren Videla, Cecilia Echarte, Laura Nitrógeno Abonos Nitrogenados Mineralización Maíz Soja Cultivo Intercalado Nitrogen Nitrogen Fertilizers Mineralization Maize Soybeans Intercropping 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. EEA Balcarce Fil: Regehr, Alison. University of Waterloo. Department of Environment and Resource Studies; Canadá Fil: Oelbermann, Maren. University of Waterloo. Department of Environment and Resource Studies; Canadá Fil: Videla, Cecilia. Universidad Nacional de Mar del Plata; Argentina Fil: Echarte, Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2019-01-08T11:54:46Z 2019-01-08T11:54:46Z 2015-06 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://link.springer.com/article/10.1007/s11104-015-2438-0 http://hdl.handle.net/20.500.12123/4224 0032-079X 1573-5036 https://doi.org/10.1007/s11104-015-2438-0 eng info:eu-repo/semantics/restrictedAccess application/pdf Springer Plant and Soil 391 (1–2) : 353–365 (June 2015) |
| spellingShingle | Nitrógeno Abonos Nitrogenados Mineralización Maíz Soja Cultivo Intercalado Nitrogen Nitrogen Fertilizers Mineralization Maize Soybeans Intercropping Regehr, Alison Oelbermann, Maren Videla, Cecilia Echarte, Laura Gross nitrogen mineralization and immobilization in temperate maize-soybean intercrops |
| title | Gross nitrogen mineralization and immobilization in temperate maize-soybean intercrops |
| title_full | Gross nitrogen mineralization and immobilization in temperate maize-soybean intercrops |
| title_fullStr | Gross nitrogen mineralization and immobilization in temperate maize-soybean intercrops |
| title_full_unstemmed | Gross nitrogen mineralization and immobilization in temperate maize-soybean intercrops |
| title_short | Gross nitrogen mineralization and immobilization in temperate maize-soybean intercrops |
| title_sort | gross nitrogen mineralization and immobilization in temperate maize soybean intercrops |
| topic | Nitrógeno Abonos Nitrogenados Mineralización Maíz Soja Cultivo Intercalado Nitrogen Nitrogen Fertilizers Mineralization Maize Soybeans Intercropping |
| url | https://link.springer.com/article/10.1007/s11104-015-2438-0 http://hdl.handle.net/20.500.12123/4224 https://doi.org/10.1007/s11104-015-2438-0 |
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