Using site-specific nitrogen management in rainfed corn to reduce the risk of nitrate leaching

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Managing nitrogen (N) to achieve yield potential and limit losses to the environment is challenging due to the temporal and spatial variability in crop N uptake which affects the distribution of soil-N. Nitrogen fertilization using site-specific management (SSM) is one of a number of strategies that...

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Autores principales: Muschietti-Piana, María del Pilar, Cipriotti, Pablo Ariel, Urricariet, Susana, Peralta, Nahuel Raúl, Niborski, Mauricio
Formato: Objeto de conferencia Resumen
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Informáticas
Management zones
Yield potential
Soil residual-nitrogen
Water use efficiency
Drought
Nitrogen use efficiency
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/115359
http://49jaiio.sadio.org.ar/pdfs/cai/CAI_01.pdf
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-115359
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Informáticas
Management zones
Yield potential
Soil residual-nitrogen
Water use efficiency
Drought
Nitrogen use efficiency
spellingShingle Ciencias Informáticas
Management zones
Yield potential
Soil residual-nitrogen
Water use efficiency
Drought
Nitrogen use efficiency
Muschietti-Piana, María del Pilar
Cipriotti, Pablo Ariel
Urricariet, Susana
Peralta, Nahuel Raúl
Niborski, Mauricio
Using site-specific nitrogen management in rainfed corn to reduce the risk of nitrate leaching
topic_facet Ciencias Informáticas
Management zones
Yield potential
Soil residual-nitrogen
Water use efficiency
Drought
Nitrogen use efficiency
description Managing nitrogen (N) to achieve yield potential and limit losses to the environment is challenging due to the temporal and spatial variability in crop N uptake which affects the distribution of soil-N. Nitrogen fertilization using site-specific management (SSM) is one of a number of strategies that can improve the efficiency of N use and reduce the losses of N to the environment from cropping systems. The aim was to assess: (i) corn (Zea mays L.) grain yield and N uptake; and (ii) soil residual- and potentially leachable-N, and its relationship with N and water use efficiency using SSM vs. uniform management (UM) strategies in high-(HP) and low-(LP) productivity zones on soils of the Inland Pampas of Argentina. Differences in soil residual- and potentially leachable-N, corn grain yield, N uptake, water and N use efficiency were compared between treatments. In HP-zones, corn grain yield and total biomass were 2.7 and 4.2 Mgha−1higher with SSM than UM, and corn grain N uptake and total N uptake increased by 21% and 18%with SSM when compared to UM. Soil residual-N at field-scale was reduced by 18% with SSM. Marginal differences in potentially leachable-N among treatments were observed throughout the soil profile; the highest nitrate concentration was 6.6 mg kg−1in LP-zones with UM within the 210–240 cm soil layer. Overall corn water use efficiency in total biomass was 16% higher with SSM than with UM in both LP- and HP-zones. Using SSM in the LP-zones increased corn N use efficiency in grain and total biomass by 50%and 43% respectively. In this context, SSM can be considered as a conservation practice that optimizes N and water use efficiency by corn under dry conditions.
format Objeto de conferencia
Resumen
author Muschietti-Piana, María del Pilar
Cipriotti, Pablo Ariel
Urricariet, Susana
Peralta, Nahuel Raúl
Niborski, Mauricio
author_facet Muschietti-Piana, María del Pilar
Cipriotti, Pablo Ariel
Urricariet, Susana
Peralta, Nahuel Raúl
Niborski, Mauricio
author_sort Muschietti-Piana, María del Pilar
title Using site-specific nitrogen management in rainfed corn to reduce the risk of nitrate leaching
title_short Using site-specific nitrogen management in rainfed corn to reduce the risk of nitrate leaching
title_full Using site-specific nitrogen management in rainfed corn to reduce the risk of nitrate leaching
title_fullStr Using site-specific nitrogen management in rainfed corn to reduce the risk of nitrate leaching
title_full_unstemmed Using site-specific nitrogen management in rainfed corn to reduce the risk of nitrate leaching
title_sort using site-specific nitrogen management in rainfed corn to reduce the risk of nitrate leaching
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/115359
http://49jaiio.sadio.org.ar/pdfs/cai/CAI_01.pdf
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