Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500001 |
Resumo: | Irrigation scheduling based on soil moisture status is one of the most useful methods because of its practicality and low cost. The effects of available soil water depletion on evapotranspiration (ETc), transpiration (E), leaf water potential at predawn (psiP) and midday (psiM), stomatal conductance (gs) and net CO2 assimilation (A) in lime 'Tahiti' trees (Citrus latifolia) were evaluated to improve irrigation schedule and minimize water use without causing water stress. The trees were spaced 7 <FONT FACE=Symbol>´</FONT> 4 m and drip-irrigated by four drippers with the available soil water content (AWC) depleted by suspension of irrigation (40 days). Leaf water potential was measured on a pressure chamber (psiP and psiM) and leaf gas exchange was measured by infrared gas analyzer (E, gs and A). Evapotranspiration was determined with the aid of weighing lysimeter. Water soil content and potential (psiS) were monitored with TDR probes and tensiometers, respectively, installed at 0.3, 0.6 and 0.9 m depths. Meteorological variables were monitored with an automatic weather station in the experimental area. The threshold AWC level for the onset of ETc decline was 43%, and 60% for gs, A, E and Y P. Also, psiP was more sensitive to AWC than psiM, and is therefore a better tool for irrigation. When AWC was around 60%, values of psiP and psis were -0.62 MPa and -48.8 kPa, respectively. |
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Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime treesevapotranspirationcitruslysimetergas exchangetensiometerIrrigation scheduling based on soil moisture status is one of the most useful methods because of its practicality and low cost. The effects of available soil water depletion on evapotranspiration (ETc), transpiration (E), leaf water potential at predawn (psiP) and midday (psiM), stomatal conductance (gs) and net CO2 assimilation (A) in lime 'Tahiti' trees (Citrus latifolia) were evaluated to improve irrigation schedule and minimize water use without causing water stress. The trees were spaced 7 <FONT FACE=Symbol>´</FONT> 4 m and drip-irrigated by four drippers with the available soil water content (AWC) depleted by suspension of irrigation (40 days). Leaf water potential was measured on a pressure chamber (psiP and psiM) and leaf gas exchange was measured by infrared gas analyzer (E, gs and A). Evapotranspiration was determined with the aid of weighing lysimeter. Water soil content and potential (psiS) were monitored with TDR probes and tensiometers, respectively, installed at 0.3, 0.6 and 0.9 m depths. Meteorological variables were monitored with an automatic weather station in the experimental area. The threshold AWC level for the onset of ETc decline was 43%, and 60% for gs, A, E and Y P. Also, psiP was more sensitive to AWC than psiM, and is therefore a better tool for irrigation. When AWC was around 60%, values of psiP and psis were -0.62 MPa and -48.8 kPa, respectively.Escola Superior de Agricultura "Luiz de Queiroz"2005-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500001Scientia Agricola v.62 n.5 2005reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162005000500001info:eu-repo/semantics/openAccessSilva,Cláudio Ricardo daFolegatti,Marcos ViníciusSilva,Tonny José Araújo daAlves Júnior,JoséSouza,Claudinei FonsecaRibeiro,Rafael Vasconceloseng2005-09-28T00:00:00Zoai:scielo:S0103-90162005000500001Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2005-09-28T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees |
title |
Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees |
spellingShingle |
Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees Silva,Cláudio Ricardo da evapotranspiration citrus lysimeter gas exchange tensiometer |
title_short |
Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees |
title_full |
Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees |
title_fullStr |
Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees |
title_full_unstemmed |
Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees |
title_sort |
Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees |
author |
Silva,Cláudio Ricardo da |
author_facet |
Silva,Cláudio Ricardo da Folegatti,Marcos Vinícius Silva,Tonny José Araújo da Alves Júnior,José Souza,Claudinei Fonseca Ribeiro,Rafael Vasconcelos |
author_role |
author |
author2 |
Folegatti,Marcos Vinícius Silva,Tonny José Araújo da Alves Júnior,José Souza,Claudinei Fonseca Ribeiro,Rafael Vasconcelos |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Silva,Cláudio Ricardo da Folegatti,Marcos Vinícius Silva,Tonny José Araújo da Alves Júnior,José Souza,Claudinei Fonseca Ribeiro,Rafael Vasconcelos |
dc.subject.por.fl_str_mv |
evapotranspiration citrus lysimeter gas exchange tensiometer |
topic |
evapotranspiration citrus lysimeter gas exchange tensiometer |
description |
Irrigation scheduling based on soil moisture status is one of the most useful methods because of its practicality and low cost. The effects of available soil water depletion on evapotranspiration (ETc), transpiration (E), leaf water potential at predawn (psiP) and midday (psiM), stomatal conductance (gs) and net CO2 assimilation (A) in lime 'Tahiti' trees (Citrus latifolia) were evaluated to improve irrigation schedule and minimize water use without causing water stress. The trees were spaced 7 <FONT FACE=Symbol>´</FONT> 4 m and drip-irrigated by four drippers with the available soil water content (AWC) depleted by suspension of irrigation (40 days). Leaf water potential was measured on a pressure chamber (psiP and psiM) and leaf gas exchange was measured by infrared gas analyzer (E, gs and A). Evapotranspiration was determined with the aid of weighing lysimeter. Water soil content and potential (psiS) were monitored with TDR probes and tensiometers, respectively, installed at 0.3, 0.6 and 0.9 m depths. Meteorological variables were monitored with an automatic weather station in the experimental area. The threshold AWC level for the onset of ETc decline was 43%, and 60% for gs, A, E and Y P. Also, psiP was more sensitive to AWC than psiM, and is therefore a better tool for irrigation. When AWC was around 60%, values of psiP and psis were -0.62 MPa and -48.8 kPa, respectively. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-10-01 |
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=S0103-90162005000500001 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162005000500001 |
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.62 n.5 2005 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 |
_version_ |
1748936459744706560 |