Nitrogen mineralization in a coarse soil of the semi - arid Pampas of Argentina
Use of the nitrogen balance sheet method as a fertilization strategy in the semi-arid Pampas of Argentina is restricted because of a lack of available information regarding nitrogen mineralization in its coarse soils. Our objective was to determine nitrogen mineralization during corn [Zea mays L.] a...
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2013bono.pdf LINK AL EDITOR |
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| 100 | 1 | |a Bono, Angel Alfredo |9 16055 | |
| 245 | 0 | 0 | |a Nitrogen mineralization in a coarse soil of the semi - arid Pampas of Argentina |
| 520 | |a Use of the nitrogen balance sheet method as a fertilization strategy in the semi-arid Pampas of Argentina is restricted because of a lack of available information regarding nitrogen mineralization in its coarse soils. Our objective was to determine nitrogen mineralization during corn [Zea mays L.] and following wheat [Triticum aestivum L.] growing cycles under contrasting tillage systems in a representative soil of the region. Mineralized nitrogen from decomposing residues was estimated using the litter bag method and mineralization from soil organic matter using a mass balance approach. Soil water content was higher under no-till during the corn growing season and no differences were detected for wheat during this period. Soil temperature was practically not affected by tillage system. Biomass and nitrogen absorption were higher under no-till than under disk till in corn [p less than 0.05], as were nitrogen mineralization from residues and organic matter [p less than 0.05]. In wheat, no differences in biomass, nitrogen absorption and mineralization were detected between treatments. Mineralization during crop growing cycles accounted for 44.8-67.5 percent of the absorbed nitrogen. Differences in nitrogen mineralization between tillage systems resulted from the greater water availability under no-till than under disk till during the summer. | ||
| 653 | 0 | |a NITROGEN BALANCE SHEET METHOD | |
| 653 | 0 | |a NITROGEN MINERALIZATION | |
| 653 | 0 | |a RESIDUE DECOMPOSITION | |
| 653 | 0 | |a TRITICUM AESTIVUM | |
| 653 | 0 | |a ZEA MAYS | |
| 700 | 1 | |9 7830 |a Alvarez, Roberto | |
| 773 | |t Archives of Agronomy and Soil Science |g vol.59, no.2 (2013), p.259-272 | ||
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| 900 | |a ^tNitrogen mineralization in a coarse soil of the semi-arid Pampas of Argentina | ||
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| 900 | |a ^aAlvarez^bR. | ||
| 900 | |a ^aBono^bA. | ||
| 900 | |a ^aAlvarez^bR. | ||
| 900 | |a ^aBono^bA.^tEEA Anguil, National Institute of Agricultural Technology [INTA], Anguil La Pampa, Argentina | ||
| 900 | |a ^aAlvarez^bR.^tFaculty of Agronomy, University of Buenos Aires-CONICET, Buenos Aires, Argentina | ||
| 900 | |a ^tArchives of Agronomy and Soil Science^cArch. Agron. Soil Sci. | ||
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| 900 | |a Vol. 59, no. 2 | ||
| 900 | |a 272 | ||
| 900 | |a NITROGEN BALANCE SHEET METHOD | ||
| 900 | |a NITROGEN MINERALIZATION | ||
| 900 | |a RESIDUE DECOMPOSITION | ||
| 900 | |a TRITICUM AESTIVUM | ||
| 900 | |a ZEA MAYS | ||
| 900 | |a Use of the nitrogen balance sheet method as a fertilization strategy in the semi-arid Pampas of Argentina is restricted because of a lack of available information regarding nitrogen mineralization in its coarse soils. Our objective was to determine nitrogen mineralization during corn [Zea mays L.] and following wheat [Triticum aestivum L.] growing cycles under contrasting tillage systems in a representative soil of the region. Mineralized nitrogen from decomposing residues was estimated using the litter bag method and mineralization from soil organic matter using a mass balance approach. Soil water content was higher under no-till during the corn growing season and no differences were detected for wheat during this period. Soil temperature was practically not affected by tillage system. Biomass and nitrogen absorption were higher under no-till than under disk till in corn [p less than 0.05], as were nitrogen mineralization from residues and organic matter [p less than 0.05]. In wheat, no differences in biomass, nitrogen absorption and mineralization were detected between treatments. Mineralization during crop growing cycles accounted for 44.8-67.5 percent of the absorbed nitrogen. Differences in nitrogen mineralization between tillage systems resulted from the greater water availability under no-till than under disk till during the summer. | ||
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