Fertilization with urea, ammonium and nitrate produce different effects on growth, hydraulic traits and drought tolerance in <i>Pinus taeda</i> seedlings

Urea fertilization decreases <i>Pinus taeda</i> L. growth in clay soils of subtropical areas. The negative effect of urea is related to changes in some hydraulic traits, similar to those observed in plants growing under drought. The aims of this work were (i) to determine whether differe...

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Detalles Bibliográficos
Autores principales: Faustino, Laura Inés, Moretti, Ana Paula, Graciano, Corina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Agrarias
Ciencias Naturales
Allocation
Dry weight
Fertilizer
Hydraulic conductance
Hydraulic conductivity
Nitrogen
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86013
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86013
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
Ciencias Naturales
Allocation
Dry weight
Fertilizer
Hydraulic conductance
Hydraulic conductivity
Nitrogen
spellingShingle Ciencias Agrarias
Ciencias Naturales
Allocation
Dry weight
Fertilizer
Hydraulic conductance
Hydraulic conductivity
Nitrogen
Faustino, Laura Inés
Moretti, Ana Paula
Graciano, Corina
Fertilization with urea, ammonium and nitrate produce different effects on growth, hydraulic traits and drought tolerance in <i>Pinus taeda</i> seedlings
topic_facet Ciencias Agrarias
Ciencias Naturales
Allocation
Dry weight
Fertilizer
Hydraulic conductance
Hydraulic conductivity
Nitrogen
description Urea fertilization decreases <i>Pinus taeda</i> L. growth in clay soils of subtropical areas. The negative effect of urea is related to changes in some hydraulic traits, similar to those observed in plants growing under drought. The aims of this work were (i) to determine whether different sources of nitrogen applied as fertilizers produce similar changes in growth and hydraulic traits to those observed by urea fertilization and (ii) to analyze the impact of those changes in plant drought tolerance. Plants fertilized with urea, nitrate (NO<SUB>3</SUB><SUP>-</SUP>) or ammonium (NH<SUB>4</SUB><SUP>+</SUP>) were grown well watered or with reduced water supply. Urea and NO<SUB>3</SUB><SUP>-</SUP> fertilization reduced plant growth and increased root hydraulic conductance scaled by root dry weight (DW). NH<SUB>4</SUB><SUP>+</SUP> fertilization did not reduce plant growth and increased shoot hydraulic conductance and stem hydraulic conductivity. We conclude that NO<SUB>3</SUB><SUP>-</SUP> is the ion involved in the changes linked to the negative effect of urea fertilization on P. taeda growth. NH<SUB>4</SUB><SUP>+</SUP> fertilization does not change drought susceptibility and it produces changes in shoot hydraulic traits, therefore plants avoid the depressive effect of fertilization. Urea and NO<SUB>3</SUB><SUP>-</SUP> fertilizers induce changes in DW and root hydraulic conductance and consequently plants are less affected by drought.
format Articulo
Articulo
author Faustino, Laura Inés
Moretti, Ana Paula
Graciano, Corina
author_facet Faustino, Laura Inés
Moretti, Ana Paula
Graciano, Corina
author_sort Faustino, Laura Inés
title Fertilization with urea, ammonium and nitrate produce different effects on growth, hydraulic traits and drought tolerance in <i>Pinus taeda</i> seedlings
title_short Fertilization with urea, ammonium and nitrate produce different effects on growth, hydraulic traits and drought tolerance in <i>Pinus taeda</i> seedlings
title_full Fertilization with urea, ammonium and nitrate produce different effects on growth, hydraulic traits and drought tolerance in <i>Pinus taeda</i> seedlings
title_fullStr Fertilization with urea, ammonium and nitrate produce different effects on growth, hydraulic traits and drought tolerance in <i>Pinus taeda</i> seedlings
title_full_unstemmed Fertilization with urea, ammonium and nitrate produce different effects on growth, hydraulic traits and drought tolerance in <i>Pinus taeda</i> seedlings
title_sort fertilization with urea, ammonium and nitrate produce different effects on growth, hydraulic traits and drought tolerance in <i>pinus taeda</i> seedlings
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86013
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