Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina
In semi-arid regions, soil water and nitrogen (N) are generally limiting factors for corn (Zea mays L.) production; hence, implementation of appropriate N fertilization strategies is needed. The use of precision agriculture practices based on specific site and crop properties may contribute to a better allocation of fertilizer among management zones (MZ). The aim of this study was to develop a model for diagnosis of N availability and recommendation of N fertilizer rates adjusted to MZ for dryland corn crops growing in Haplustolls. The model considered variability between MZ by including site-specific variables [soil available water content at sowing (SAW) and Available Nitrogen (soil available N-NO3 at planting + applied N, Nd)] using spatial statistical analysis. The study was conducted in Córdoba, Argentina in Haplustolls and consisted in four field trials of N fertilizer (range 0–161 kg N ha−1) in each MZ. The MZ were selected based on elevation maps analysis. Grain yields varied between MZ and increased with larger SAW and Nd at sowing. Grain responses to Nd and SAW in any MZ were not different between sites, allowing to fit a regional model whose parameters (Nd, Nd2, SAW, SAW2) contributed significantly (p < 0.001) to yield prediction. Agronomical and economically optimum N rates varied among MZs. However, the spatial variability of optimum N rates among MZs within sites was not enough to recommend variable N fertilizer rates instead of a uniform rate. Variable N fertilizer rates should be recommended only if variability in SAW and soil N among MZ is greater than that found in this work.
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Springer
2011-12
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Subjects: | Aplicación de Abonos, Abonos Nitrogenados, Tipos de Suelos, Maíz, Cultivo de Temporal, Fertilizer Application, Nitrogen Fertilizers, Soil Types, Site Specific Nutrient Management, Maize, Rainfed Farming, Haplustolls, Haplustoles, Fertilización NItrogenada, Región Pampeana, |
Online Access: | https://link.springer.com/article/10.1007/s11119-011-9224-7 http://hdl.handle.net/20.500.12123/5641 https://doi.org/10.1007/s11119-011-9224-7 |
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oai:localhost:20.500.12123-56412019-08-16T13:44:37Z Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina Gregoret, María Celeste Diaz Zorita, Martin Dardanelli, Julio Luis Bongiovanni, Rodolfo Aplicación de Abonos Abonos Nitrogenados Tipos de Suelos Maíz Cultivo de Temporal Fertilizer Application Nitrogen Fertilizers Soil Types Site Specific Nutrient Management Maize Rainfed Farming Haplustolls Haplustoles Fertilización NItrogenada Región Pampeana In semi-arid regions, soil water and nitrogen (N) are generally limiting factors for corn (Zea mays L.) production; hence, implementation of appropriate N fertilization strategies is needed. The use of precision agriculture practices based on specific site and crop properties may contribute to a better allocation of fertilizer among management zones (MZ). The aim of this study was to develop a model for diagnosis of N availability and recommendation of N fertilizer rates adjusted to MZ for dryland corn crops growing in Haplustolls. The model considered variability between MZ by including site-specific variables [soil available water content at sowing (SAW) and Available Nitrogen (soil available N-NO3 at planting + applied N, Nd)] using spatial statistical analysis. The study was conducted in Córdoba, Argentina in Haplustolls and consisted in four field trials of N fertilizer (range 0–161 kg N ha−1) in each MZ. The MZ were selected based on elevation maps analysis. Grain yields varied between MZ and increased with larger SAW and Nd at sowing. Grain responses to Nd and SAW in any MZ were not different between sites, allowing to fit a regional model whose parameters (Nd, Nd2, SAW, SAW2) contributed significantly (p < 0.001) to yield prediction. Agronomical and economically optimum N rates varied among MZs. However, the spatial variability of optimum N rates among MZs within sites was not enough to recommend variable N fertilizer rates instead of a uniform rate. Variable N fertilizer rates should be recommended only if variability in SAW and soil N among MZ is greater than that found in this work. EEA Manfredi Fil: Gregoret, María Celeste. Asociación Argentina de Consorcios Regionales de Experimentación Agrícola; Argentina Fil: Diaz Zorita, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Merck Crop Bioscience Argentina; Argentina Fil: Dardanelli, Julio Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina Fil: Bongiovanni, Rodolfo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina 2019-08-16T13:43:00Z 2019-08-16T13:43:00Z 2011-12 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://link.springer.com/article/10.1007/s11119-011-9224-7 http://hdl.handle.net/20.500.12123/5641 1385-2256 1573-1618 https://doi.org/10.1007/s11119-011-9224-7 eng info:eu-repo/semantics/restrictedAccess application/pdf Springer Precision Agriculture 12 : 831 (December 2011) |
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Aplicación de Abonos Abonos Nitrogenados Tipos de Suelos Maíz Cultivo de Temporal Fertilizer Application Nitrogen Fertilizers Soil Types Site Specific Nutrient Management Maize Rainfed Farming Haplustolls Haplustoles Fertilización NItrogenada Región Pampeana Aplicación de Abonos Abonos Nitrogenados Tipos de Suelos Maíz Cultivo de Temporal Fertilizer Application Nitrogen Fertilizers Soil Types Site Specific Nutrient Management Maize Rainfed Farming Haplustolls Haplustoles Fertilización NItrogenada Región Pampeana |
spellingShingle |
Aplicación de Abonos Abonos Nitrogenados Tipos de Suelos Maíz Cultivo de Temporal Fertilizer Application Nitrogen Fertilizers Soil Types Site Specific Nutrient Management Maize Rainfed Farming Haplustolls Haplustoles Fertilización NItrogenada Región Pampeana Aplicación de Abonos Abonos Nitrogenados Tipos de Suelos Maíz Cultivo de Temporal Fertilizer Application Nitrogen Fertilizers Soil Types Site Specific Nutrient Management Maize Rainfed Farming Haplustolls Haplustoles Fertilización NItrogenada Región Pampeana Gregoret, María Celeste Diaz Zorita, Martin Dardanelli, Julio Luis Bongiovanni, Rodolfo Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina |
description |
In semi-arid regions, soil water and nitrogen (N) are generally limiting factors for corn (Zea mays L.) production; hence, implementation of appropriate N fertilization strategies is needed. The use of precision agriculture practices based on specific site and crop properties may contribute to a better allocation of fertilizer among management zones (MZ). The aim of this study was to develop a model for diagnosis of N availability and recommendation of N fertilizer rates adjusted to MZ for dryland corn crops growing in Haplustolls. The model considered variability between MZ by including site-specific variables [soil available water content at sowing (SAW) and Available Nitrogen (soil available N-NO3 at planting + applied N, Nd)] using spatial statistical analysis. The study was conducted in Córdoba, Argentina in Haplustolls and consisted in four field trials of N fertilizer (range 0–161 kg N ha−1) in each MZ. The MZ were selected based on elevation maps analysis. Grain yields varied between MZ and increased with larger SAW and Nd at sowing. Grain responses to Nd and SAW in any MZ were not different between sites, allowing to fit a regional model whose parameters (Nd, Nd2, SAW, SAW2) contributed significantly (p < 0.001) to yield prediction. Agronomical and economically optimum N rates varied among MZs. However, the spatial variability of optimum N rates among MZs within sites was not enough to recommend variable N fertilizer rates instead of a uniform rate. Variable N fertilizer rates should be recommended only if variability in SAW and soil N among MZ is greater than that found in this work. |
format |
info:ar-repo/semantics/artículo |
topic_facet |
Aplicación de Abonos Abonos Nitrogenados Tipos de Suelos Maíz Cultivo de Temporal Fertilizer Application Nitrogen Fertilizers Soil Types Site Specific Nutrient Management Maize Rainfed Farming Haplustolls Haplustoles Fertilización NItrogenada Región Pampeana |
author |
Gregoret, María Celeste Diaz Zorita, Martin Dardanelli, Julio Luis Bongiovanni, Rodolfo |
author_facet |
Gregoret, María Celeste Diaz Zorita, Martin Dardanelli, Julio Luis Bongiovanni, Rodolfo |
author_sort |
Gregoret, María Celeste |
title |
Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina |
title_short |
Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina |
title_full |
Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina |
title_fullStr |
Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina |
title_full_unstemmed |
Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina |
title_sort |
regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central pampas, argentina |
publisher |
Springer |
publishDate |
2011-12 |
url |
https://link.springer.com/article/10.1007/s11119-011-9224-7 http://hdl.handle.net/20.500.12123/5641 https://doi.org/10.1007/s11119-011-9224-7 |
work_keys_str_mv |
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_version_ |
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