Nitrogen on growth and yield of lettuce plants grown under root confinement

Detalhes bibliográficos
Autor(a) principal: Cardoso,Francieli L
Data de Publicação: 2015
Outros Autores: Andriolo,Jerônimo L, Picio,Miriane Dal, Piccin,Marcieli, Souza,Jéssica M
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Horticultura Brasileira
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000400422
Resumo: ABSTRACT: The objective of this research was to test the hypothesis that when lettuce plants grow under root confinement, development and yield is reduced and that such negative effects may be compensated by increasing nitrogen availability in the rooting media. The experiment was conducted between August 11st and September 23rd 2011. Lettuce transplants, cultivar Stella, bearing five leaves, were planted in pots using sand as substrate. Treatments were three root confinement levels and five N concentrations in the nutrient solution, in a 3x5 factorial randomized experimental design with four replications. Root confinements were simulated by pot sizes of 2.5 dm³ (no confinement, the control); 1.0 dm³ (moderate) and 0.4 dm³ (severe). Nitrogen concentrations were: 5.55 (C1), 8.05 (C2), 10.55 (C3), 13.05 (C4) and 15.55 (C5) mmol/L. Interactions were observed between confinement levels and N concentrations. Plants grown under severe root confinement supplied by the nutrient solution at the concentration of 10.55 mmol/L of N reached leaf growth similar to those under no root confinement at 5.55 mmol/L of N. Increasing the N concentration in the nutrient solution enhanced shoot growth but decreased root growth. In lettuce plants grown under root confinement, plant growth is reduced and it is not compensated by increasing N fertilization rates. In both horticultural conventional or soilless production systems, managing practices for stimulate root growth has to be considered to maximize lettuce plant growth and nitrogen use efficiency.
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spelling Nitrogen on growth and yield of lettuce plants grown under root confinementLactuca sativafertilizationhorticulturemineral nutrition.ABSTRACT: The objective of this research was to test the hypothesis that when lettuce plants grow under root confinement, development and yield is reduced and that such negative effects may be compensated by increasing nitrogen availability in the rooting media. The experiment was conducted between August 11st and September 23rd 2011. Lettuce transplants, cultivar Stella, bearing five leaves, were planted in pots using sand as substrate. Treatments were three root confinement levels and five N concentrations in the nutrient solution, in a 3x5 factorial randomized experimental design with four replications. Root confinements were simulated by pot sizes of 2.5 dm³ (no confinement, the control); 1.0 dm³ (moderate) and 0.4 dm³ (severe). Nitrogen concentrations were: 5.55 (C1), 8.05 (C2), 10.55 (C3), 13.05 (C4) and 15.55 (C5) mmol/L. Interactions were observed between confinement levels and N concentrations. Plants grown under severe root confinement supplied by the nutrient solution at the concentration of 10.55 mmol/L of N reached leaf growth similar to those under no root confinement at 5.55 mmol/L of N. Increasing the N concentration in the nutrient solution enhanced shoot growth but decreased root growth. In lettuce plants grown under root confinement, plant growth is reduced and it is not compensated by increasing N fertilization rates. In both horticultural conventional or soilless production systems, managing practices for stimulate root growth has to be considered to maximize lettuce plant growth and nitrogen use efficiency.Associação Brasileira de Horticultura2015-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000400422Horticultura Brasileira v.33 n.4 2015reponame:Horticultura Brasileirainstname:Associação Brasileira de Horticultura (ABH)instacron:ABH10.1590/S0102-053620150000400003info:eu-repo/semantics/openAccessCardoso,Francieli LAndriolo,Jerônimo LPicio,Miriane DalPiccin,MarcieliSouza,Jéssica Meng2016-01-07T00:00:00Zoai:scielo:S0102-05362015000400422Revistahttp://cms.horticulturabrasileira.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||hortbras@gmail.com1806-99910102-0536opendoar:2016-01-07T00:00Horticultura Brasileira - Associação Brasileira de Horticultura (ABH)false
dc.title.none.fl_str_mv Nitrogen on growth and yield of lettuce plants grown under root confinement
title Nitrogen on growth and yield of lettuce plants grown under root confinement
spellingShingle Nitrogen on growth and yield of lettuce plants grown under root confinement
Cardoso,Francieli L
Lactuca sativa
fertilization
horticulture
mineral nutrition.
title_short Nitrogen on growth and yield of lettuce plants grown under root confinement
title_full Nitrogen on growth and yield of lettuce plants grown under root confinement
title_fullStr Nitrogen on growth and yield of lettuce plants grown under root confinement
title_full_unstemmed Nitrogen on growth and yield of lettuce plants grown under root confinement
title_sort Nitrogen on growth and yield of lettuce plants grown under root confinement
author Cardoso,Francieli L
author_facet Cardoso,Francieli L
Andriolo,Jerônimo L
Picio,Miriane Dal
Piccin,Marcieli
Souza,Jéssica M
author_role author
author2 Andriolo,Jerônimo L
Picio,Miriane Dal
Piccin,Marcieli
Souza,Jéssica M
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Cardoso,Francieli L
Andriolo,Jerônimo L
Picio,Miriane Dal
Piccin,Marcieli
Souza,Jéssica M
dc.subject.por.fl_str_mv Lactuca sativa
fertilization
horticulture
mineral nutrition.
topic Lactuca sativa
fertilization
horticulture
mineral nutrition.
description ABSTRACT: The objective of this research was to test the hypothesis that when lettuce plants grow under root confinement, development and yield is reduced and that such negative effects may be compensated by increasing nitrogen availability in the rooting media. The experiment was conducted between August 11st and September 23rd 2011. Lettuce transplants, cultivar Stella, bearing five leaves, were planted in pots using sand as substrate. Treatments were three root confinement levels and five N concentrations in the nutrient solution, in a 3x5 factorial randomized experimental design with four replications. Root confinements were simulated by pot sizes of 2.5 dm³ (no confinement, the control); 1.0 dm³ (moderate) and 0.4 dm³ (severe). Nitrogen concentrations were: 5.55 (C1), 8.05 (C2), 10.55 (C3), 13.05 (C4) and 15.55 (C5) mmol/L. Interactions were observed between confinement levels and N concentrations. Plants grown under severe root confinement supplied by the nutrient solution at the concentration of 10.55 mmol/L of N reached leaf growth similar to those under no root confinement at 5.55 mmol/L of N. Increasing the N concentration in the nutrient solution enhanced shoot growth but decreased root growth. In lettuce plants grown under root confinement, plant growth is reduced and it is not compensated by increasing N fertilization rates. In both horticultural conventional or soilless production systems, managing practices for stimulate root growth has to be considered to maximize lettuce plant growth and nitrogen use efficiency.
publishDate 2015
dc.date.none.fl_str_mv 2015-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000400422
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000400422
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0102-053620150000400003
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Horticultura
publisher.none.fl_str_mv Associação Brasileira de Horticultura
dc.source.none.fl_str_mv Horticultura Brasileira v.33 n.4 2015
reponame:Horticultura Brasileira
instname:Associação Brasileira de Horticultura (ABH)
instacron:ABH
instname_str Associação Brasileira de Horticultura (ABH)
instacron_str ABH
institution ABH
reponame_str Horticultura Brasileira
collection Horticultura Brasileira
repository.name.fl_str_mv Horticultura Brasileira - Associação Brasileira de Horticultura (ABH)
repository.mail.fl_str_mv ||hortbras@gmail.com
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