Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought

Detalhes bibliográficos
Autor(a) principal: Lundstrom, Dylan
Data de Publicação: 2017
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/15839
Resumo: Mestrado Vinifera Euromaster - Instituto Superior de Agronomia - UL
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spelling Effects of vineyard deficit irrigation on berry composition and yield during 2014 California droughtdeficit irrigationwater deficitberry weightsap flowwater potentialMestrado Vinifera Euromaster - Instituto Superior de Agronomia - ULThe effect of deficit irrigation on berry composition, berry weight and yield was studied across 5 vineyards located in two regions exhibiting Mediterranean climate in California. The study used sap flow and pre-dawn leaf water potential (PDWP) to monitor the water status of the vines and trigger irrigation opportunities. Vineyard blocks were “split” and two irrigation regimens were imposed: traditional and experimental. Traditional treatment for each vineyard continued conventional methodologies used by growers at each site. Experimental sites used sap flow as the primary indication of irrigation timing while PDWP was used to confirm sap flow data. Fruit composition was monitored starting at veraison through to harvest, monitoring primary metabolites at all sites and secondary metabolites at participating sites. Variables monitored included: water applied, berry weight, tannin, total anthocyanins, yield, water deficit index, sugar concentration, pH and titratable acidity. Data from all sites was combined and correlations between all variables were determined. A regression analysis was also used to analyze the effects of the amount of water applied and water deficit index on yield components and berry composition. Simple data analysis shows the differences between water input in the traditional and experimental sites (30 – 100% water savings). Study outcomes were largely inconclusive and despite the strong correlations obtained between variables, they were often inconsistent with literature. Berry weight was found to have a moderately negative correlation with the amount of water applied and water deficit index. Tannin content was also found to have a negative relationship with the amount of water applied. Brix was found to be positively correlated with water applied and water deficit index. These inconsistent results may be due to factors such as different varieties, sites and management techniques being used across different producers. The absence of statistically robust results prevent us from drawing conclusions. Additional research is suggested to confirm this results in order to evaluate the viability of using the sap flow technique to manage deficit irrigationISALopes, Carlos Manuel AntunesScholasch, ThibautRepositório da Universidade de LisboaLundstrom, Dylan2018-07-24T13:28:15Z20172017-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/15839engLundstrom, D. - Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought. Lisboa: ISA, 2017, 58 p.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-12-17T01:31:28Zoai:www.repository.utl.pt:10400.5/15839Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:01:24.061615Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought
title Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought
spellingShingle Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought
Lundstrom, Dylan
deficit irrigation
water deficit
berry weight
sap flow
water potential
title_short Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought
title_full Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought
title_fullStr Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought
title_full_unstemmed Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought
title_sort Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought
author Lundstrom, Dylan
author_facet Lundstrom, Dylan
author_role author
dc.contributor.none.fl_str_mv Lopes, Carlos Manuel Antunes
Scholasch, Thibaut
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Lundstrom, Dylan
dc.subject.por.fl_str_mv deficit irrigation
water deficit
berry weight
sap flow
water potential
topic deficit irrigation
water deficit
berry weight
sap flow
water potential
description Mestrado Vinifera Euromaster - Instituto Superior de Agronomia - UL
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-01-01T00:00:00Z
2018-07-24T13:28:15Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/15839
url http://hdl.handle.net/10400.5/15839
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Lundstrom, D. - Effects of vineyard deficit irrigation on berry composition and yield during 2014 California drought. Lisboa: ISA, 2017, 58 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ISA
publisher.none.fl_str_mv ISA
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799131102270455808

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