Nitrogen fertilization and fungicide mixtures in wheat : How do they affect the severity, yield and dynamics of nitrogen under leaf rust infections?

Nitrogen (N) fertilization and fungicides are important tools in order to achieve high yields and quality in wheat (Triticum aestivum L.), although its use may affect the expression of foliar diseases such as leaf rust (LR) (Puccinia triticina Eriks.). An approach focused on the impact of LR and its...

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Autores principales: Schierenbeck, Matías, Fleitas, María Constanza, Simón, María Rosa
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Agrarias
N remobilization
N post-anthesis absorption
N stored in grains
Puccinia triticina
Fungicides
Fertilization
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131917
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131917
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
N remobilization
N post-anthesis absorption
N stored in grains
Puccinia triticina
Fungicides
Fertilization
spellingShingle Ciencias Agrarias
N remobilization
N post-anthesis absorption
N stored in grains
Puccinia triticina
Fungicides
Fertilization
Schierenbeck, Matías
Fleitas, María Constanza
Simón, María Rosa
Nitrogen fertilization and fungicide mixtures in wheat : How do they affect the severity, yield and dynamics of nitrogen under leaf rust infections?
topic_facet Ciencias Agrarias
N remobilization
N post-anthesis absorption
N stored in grains
Puccinia triticina
Fungicides
Fertilization
description Nitrogen (N) fertilization and fungicides are important tools in order to achieve high yields and quality in wheat (Triticum aestivum L.), although its use may affect the expression of foliar diseases such as leaf rust (LR) (Puccinia triticina Eriks.). An approach focused on the impact of LR and its interaction with fungicides mixtures and N fertilization rates could be useful to improve the modelling of crop N dynamics and enhance grain yield and quality in the context of the integrated management. Our study was designed to determine the additive effects of carboxamide fungicides (TSC) to a double triazole-strobilurin (TS) mixture under three N fertilization rates on the LR disease progress, healthy area duration (HAD), grain yield and N dynamics during two years. Main plots corresponded to three fungicide treatments and three N doses were the sub-plots. LR disease progress, HAD, yield, N remobilization (NREM), N post-anthesis absorption (NPA), N stored in grains (NG) and %N in grains (%Ng) were evaluated. LR severity increased at higher N rates. TSC applications produced the major decreases on LR severity and the main increases in HAD, which resulted in the higher yield increases (+2726 kg/ha). The %Ng increased with the application of fungicides when LR was controlled. LR infections generated reductions in NREM, NPA and NG, a response that could be explained by decreases in aboveground biomass and yield, coupled with reductions on N harvest index and N remobilization efficiency. Combined effect of TSC fungicides and increases in N dose showed the largest increases in NREM, NPA and NG.
format Articulo
Articulo
author Schierenbeck, Matías
Fleitas, María Constanza
Simón, María Rosa
author_facet Schierenbeck, Matías
Fleitas, María Constanza
Simón, María Rosa
author_sort Schierenbeck, Matías
title Nitrogen fertilization and fungicide mixtures in wheat : How do they affect the severity, yield and dynamics of nitrogen under leaf rust infections?
title_short Nitrogen fertilization and fungicide mixtures in wheat : How do they affect the severity, yield and dynamics of nitrogen under leaf rust infections?
title_full Nitrogen fertilization and fungicide mixtures in wheat : How do they affect the severity, yield and dynamics of nitrogen under leaf rust infections?
title_fullStr Nitrogen fertilization and fungicide mixtures in wheat : How do they affect the severity, yield and dynamics of nitrogen under leaf rust infections?
title_full_unstemmed Nitrogen fertilization and fungicide mixtures in wheat : How do they affect the severity, yield and dynamics of nitrogen under leaf rust infections?
title_sort nitrogen fertilization and fungicide mixtures in wheat : how do they affect the severity, yield and dynamics of nitrogen under leaf rust infections?
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/131917
work_keys_str_mv AT schierenbeckmatias nitrogenfertilizationandfungicidemixturesinwheathowdotheyaffecttheseverityyieldanddynamicsofnitrogenunderleafrustinfections
AT fleitasmariaconstanza nitrogenfertilizationandfungicidemixturesinwheathowdotheyaffecttheseverityyieldanddynamicsofnitrogenunderleafrustinfections
AT simonmariarosa nitrogenfertilizationandfungicidemixturesinwheathowdotheyaffecttheseverityyieldanddynamicsofnitrogenunderleafrustinfections
bdutipo_str Repositorios
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