Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases

High population growth during the last decades and reduced water resources, both in quantity and quality, have made necessary the use of saline water in agricultural activities. This study was conducted to evaluate the influence of irrigation with water of varying salinity in different phenological...

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Autores principales:	Soares de Lima,Geovani, Gomes Nobre,Reginaldo, Raj Gheyi,Hans, Almeida dos Anjos Soares,Lauriane, Oliveira da Silva,Alexsandro
Lenguaje:	English
Publicado:	Universidad de Tarapacá. Facultad de Ciencias Agronómicas 2014
Materias:	Ricinus communis L salinity nitrogen
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292014000300012
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spelling	oai:scielo:S0718-342920140003000122014-11-05Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophasesSoares de Lima,GeovaniGomes Nobre,ReginaldoRaj Gheyi,HansAlmeida dos Anjos Soares,LaurianeOliveira da Silva,Alexsandro Ricinus communis L salinity nitrogen High population growth during the last decades and reduced water resources, both in quantity and quality, have made necessary the use of saline water in agricultural activities. This study was conducted to evaluate the influence of irrigation with water of varying salinity in different phenological phases associated with nitrogen fertilization on the physiology, growth and yield of castor bean cv. BRS Energia. Research was carried out in lysimeters under field conditions in Pombal-PB, Brazil, from September 2011 to January 2012. A completely randomized block design arranged in a 5x2x2 factorial design was adopted, with three replications, testing five levels of electrical conductivity of irrigation water (ECw = 0.3, 1.2, 2.1, 3.0 and 3.9 dS m-1), two strategies of management of water salinity: 1) irrigation with low salinity water during the vegetative stage and application of different salinity levels in the reproductive phase and 2) irrigation with different ECw levels throughout the crop cycle, and two nitrogen doses (100 and 160 mg N kg-1 soil). Leaf (DML) and stem (DMS) dry matter and the number of fruits (NFruPC) and seeds (NSeePC) of the primary cluster were evaluated. Irrigation with ECw exceeding 0.3 dS m-1 affected DML and DMS negatively. The greatest accumulation of dry matter was observed in plants which were not irrigated with saline water in the initial development phase. Irrigation with saline water caused changes in gas exchange of the castor bean plant, with varying effects according to the management strategy adopted. The nitrogen dose of 160 mg N kg-1 soil increased DMS. Different ECw levels negatively affected production, regardless of the development stage. No significant interaction effect was observed among the factors studied and the variables evaluated.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.32 n.3 20142014-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292014000300012en10.4067/S0718-34292014000300012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ricinus communis L salinity nitrogen
spellingShingle	Ricinus communis L salinity nitrogen Soares de Lima,Geovani Gomes Nobre,Reginaldo Raj Gheyi,Hans Almeida dos Anjos Soares,Lauriane Oliveira da Silva,Alexsandro Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases
description	High population growth during the last decades and reduced water resources, both in quantity and quality, have made necessary the use of saline water in agricultural activities. This study was conducted to evaluate the influence of irrigation with water of varying salinity in different phenological phases associated with nitrogen fertilization on the physiology, growth and yield of castor bean cv. BRS Energia. Research was carried out in lysimeters under field conditions in Pombal-PB, Brazil, from September 2011 to January 2012. A completely randomized block design arranged in a 5x2x2 factorial design was adopted, with three replications, testing five levels of electrical conductivity of irrigation water (ECw = 0.3, 1.2, 2.1, 3.0 and 3.9 dS m-1), two strategies of management of water salinity: 1) irrigation with low salinity water during the vegetative stage and application of different salinity levels in the reproductive phase and 2) irrigation with different ECw levels throughout the crop cycle, and two nitrogen doses (100 and 160 mg N kg-1 soil). Leaf (DML) and stem (DMS) dry matter and the number of fruits (NFruPC) and seeds (NSeePC) of the primary cluster were evaluated. Irrigation with ECw exceeding 0.3 dS m-1 affected DML and DMS negatively. The greatest accumulation of dry matter was observed in plants which were not irrigated with saline water in the initial development phase. Irrigation with saline water caused changes in gas exchange of the castor bean plant, with varying effects according to the management strategy adopted. The nitrogen dose of 160 mg N kg-1 soil increased DMS. Different ECw levels negatively affected production, regardless of the development stage. No significant interaction effect was observed among the factors studied and the variables evaluated.
author	Soares de Lima,Geovani Gomes Nobre,Reginaldo Raj Gheyi,Hans Almeida dos Anjos Soares,Lauriane Oliveira da Silva,Alexsandro
author_facet	Soares de Lima,Geovani Gomes Nobre,Reginaldo Raj Gheyi,Hans Almeida dos Anjos Soares,Lauriane Oliveira da Silva,Alexsandro
author_sort	Soares de Lima,Geovani
title	Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases
title_short	Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases
title_full	Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases
title_fullStr	Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases
title_full_unstemmed	Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases
title_sort	physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases
publisher	Universidad de Tarapacá. Facultad de Ciencias Agronómicas
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292014000300012
work_keys_str_mv	AT soaresdelimageovani physiologygrowthandyieldofcastorbeanundersaltstressandnitrogendosesinphenophases AT gomesnobrereginaldo physiologygrowthandyieldofcastorbeanundersaltstressandnitrogendosesinphenophases AT rajgheyihans physiologygrowthandyieldofcastorbeanundersaltstressandnitrogendosesinphenophases AT almeidadosanjossoareslauriane physiologygrowthandyieldofcastorbeanundersaltstressandnitrogendosesinphenophases AT oliveiradasilvaalexsandro physiologygrowthandyieldofcastorbeanundersaltstressandnitrogendosesinphenophases
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Physiology, growth and yield of castor bean under salt stress and nitrogen doses in phenophases

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