Automatically controlled deficit irrigation of lettuce in “organic potponics”

Detalhes bibliográficos
Autor(a) principal: Valença,David da Cunha
Data de Publicação: 2018
Outros Autores: Carvalho,Daniel Fonseca de, Reinert,Fernanda, Azevedo,Ricardo Antunes, Pinho,Camila Ferreira de, Medici,Leonardo Oliveira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Scientia Agrícola (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100052
Resumo: ABSTRACT: Concerns with water crisis involve all sectors of society and irrigated agriculture remains the main water consumer. This study evaluated an agricultural production system for lettuce cultivation in greenhouse, “organic potponics”, to economize water and manure use, using a Simplified Irrigation Controller (SIC), based on soil matric potential monitoring. Five irrigation volumes were evaluated in pots with 4.8 L, fertilized with 200 g of vermicompost. One of the volumes was controlled with the SIC. The other volumes represented 130, 80, 60 and 33 % of that controlled by the SIC and all treatments received water at the same time. Shoot fresh weight, head diameter and stomatal conductance (gs) increased linearly with irrigation volumes. For shoot dry weight, number of leaves and water use efficiency (WUE), the regression was quadratic with maximum values at 126, 114 and 83 %, respectively. Leaf relative water content did not show variation among treatments and changes in some fluorescence parameters (Reo/RC, Sm, N and φR0) were much more remarkable to drought compared with the FV/ FM ratio, one of the most commonly used stress indicators. The data indicated a tradeoff between WUE and plant growth thus the economic values of water and lettuce should be taken into account to indicate the best SIC irrigation volume. Organic potponics is promising and should be further improved to save on water, labor and fertilizer use.
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spelling Automatically controlled deficit irrigation of lettuce in “organic potponics”Lactuca sativawater use efficiencyproduction systemwater managementautomationABSTRACT: Concerns with water crisis involve all sectors of society and irrigated agriculture remains the main water consumer. This study evaluated an agricultural production system for lettuce cultivation in greenhouse, “organic potponics”, to economize water and manure use, using a Simplified Irrigation Controller (SIC), based on soil matric potential monitoring. Five irrigation volumes were evaluated in pots with 4.8 L, fertilized with 200 g of vermicompost. One of the volumes was controlled with the SIC. The other volumes represented 130, 80, 60 and 33 % of that controlled by the SIC and all treatments received water at the same time. Shoot fresh weight, head diameter and stomatal conductance (gs) increased linearly with irrigation volumes. For shoot dry weight, number of leaves and water use efficiency (WUE), the regression was quadratic with maximum values at 126, 114 and 83 %, respectively. Leaf relative water content did not show variation among treatments and changes in some fluorescence parameters (Reo/RC, Sm, N and φR0) were much more remarkable to drought compared with the FV/ FM ratio, one of the most commonly used stress indicators. The data indicated a tradeoff between WUE and plant growth thus the economic values of water and lettuce should be taken into account to indicate the best SIC irrigation volume. Organic potponics is promising and should be further improved to save on water, labor and fertilizer use.Escola Superior de Agricultura "Luiz de Queiroz"2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100052Scientia Agricola v.75 n.1 2018reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/1678-992x-2016-0331info:eu-repo/semantics/openAccessValença,David da CunhaCarvalho,Daniel Fonseca deReinert,FernandaAzevedo,Ricardo AntunesPinho,Camila Ferreira deMedici,Leonardo Oliveiraeng2017-10-19T00:00:00Zoai:scielo:S0103-90162018000100052Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2017-10-19T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Automatically controlled deficit irrigation of lettuce in “organic potponics”
title Automatically controlled deficit irrigation of lettuce in “organic potponics”
spellingShingle Automatically controlled deficit irrigation of lettuce in “organic potponics”
Valença,David da Cunha
Lactuca sativa
water use efficiency
production system
water management
automation
title_short Automatically controlled deficit irrigation of lettuce in “organic potponics”
title_full Automatically controlled deficit irrigation of lettuce in “organic potponics”
title_fullStr Automatically controlled deficit irrigation of lettuce in “organic potponics”
title_full_unstemmed Automatically controlled deficit irrigation of lettuce in “organic potponics”
title_sort Automatically controlled deficit irrigation of lettuce in “organic potponics”
author Valença,David da Cunha
author_facet Valença,David da Cunha
Carvalho,Daniel Fonseca de
Reinert,Fernanda
Azevedo,Ricardo Antunes
Pinho,Camila Ferreira de
Medici,Leonardo Oliveira
author_role author
author2 Carvalho,Daniel Fonseca de
Reinert,Fernanda
Azevedo,Ricardo Antunes
Pinho,Camila Ferreira de
Medici,Leonardo Oliveira
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Valença,David da Cunha
Carvalho,Daniel Fonseca de
Reinert,Fernanda
Azevedo,Ricardo Antunes
Pinho,Camila Ferreira de
Medici,Leonardo Oliveira
dc.subject.por.fl_str_mv Lactuca sativa
water use efficiency
production system
water management
automation
topic Lactuca sativa
water use efficiency
production system
water management
automation
description ABSTRACT: Concerns with water crisis involve all sectors of society and irrigated agriculture remains the main water consumer. This study evaluated an agricultural production system for lettuce cultivation in greenhouse, “organic potponics”, to economize water and manure use, using a Simplified Irrigation Controller (SIC), based on soil matric potential monitoring. Five irrigation volumes were evaluated in pots with 4.8 L, fertilized with 200 g of vermicompost. One of the volumes was controlled with the SIC. The other volumes represented 130, 80, 60 and 33 % of that controlled by the SIC and all treatments received water at the same time. Shoot fresh weight, head diameter and stomatal conductance (gs) increased linearly with irrigation volumes. For shoot dry weight, number of leaves and water use efficiency (WUE), the regression was quadratic with maximum values at 126, 114 and 83 %, respectively. Leaf relative water content did not show variation among treatments and changes in some fluorescence parameters (Reo/RC, Sm, N and φR0) were much more remarkable to drought compared with the FV/ FM ratio, one of the most commonly used stress indicators. The data indicated a tradeoff between WUE and plant growth thus the economic values of water and lettuce should be taken into account to indicate the best SIC irrigation volume. Organic potponics is promising and should be further improved to save on water, labor and fertilizer use.
publishDate 2018
dc.date.none.fl_str_mv 2018-01-01
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=S0103-90162018000100052
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100052
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1678-992x-2016-0331
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 Escola Superior de Agricultura "Luiz de Queiroz"
publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
dc.source.none.fl_str_mv Scientia Agricola v.75 n.1 2018
reponame:Scientia Agrícola (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Scientia Agrícola (Online)
collection Scientia Agrícola (Online)
repository.name.fl_str_mv Scientia Agrícola (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv scientia@usp.br||alleoni@usp.br
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