Nitrogen availability effects on gas exchange measurements in field-grown maize (Zea mays L.) under irrigated Mediterranean conditions

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dc.bibliographicCitation.titleSpanish Journal Of Agricultural Researchen
dc.bibliographicCitation.volume14(4)es_ES
dc.contributor.authorIsla Climente, Ramónes_ES
dc.contributor.authorGuillén Castillo, Mónicaes_ES
dc.contributor.authorSalmerón Cortasa, Montserrates_ES
dc.date.accessioned2017-01-09T11:31:59Z
dc.date.available2017-01-09T11:31:59Z
dc.date.issued2016es_ES
dc.description.abstractThere are limited studies about the effect of nitrogen (N) deficiency on leaf growth, N status, and photosynthetic capacity of maize grown under field conditions in a Mediterranean climate. The objective of this work was to evaluate the effect of different levels of mineral N availability on leaf gas exchange parameters of sprinkler irrigated maize. The experiment was conducted in a conventional maize field located in the central part of the Ebro valley (Spain) during two seasons. Using a portable LICOR-6400 equipment, instantaneous measurements and light response curves to gas exchange were conducted in plots with different levels of N supply ranging from deficient (no fertilized) to over-fertilized (300 kg N/ha). In addition to gas exchange measurements, mineral soil N content, chlorophyll meter readings (CMR), leaf N content, and grain yield were measured in the different plots. Results showed that grain yield reached a plateau (14.5 Mg/ha) when the mineral N available was about 179 kg/ha. CMR were linearly and highly related to total N in ear leaves. The relationship between light-saturated leaf photosynthesis measurements and CMR was significant but very weak (R2=0.13) at V8 and V14 stages but increased later in the growing season (R2=0.52). Plants with intermediate levels of N supply (48<CMR<54) tended to have slightly higher assimilation rates than plants with higher CMR readings. As the available N increased, the saturation point, the light compensation point and significant increases of dark respiration rate were observed. Under the conditions of the study, leaf N contents of 1.9% in the ear leaf were enough to maximize leaf assimilation rates with no need to over-fertilize the maize cropen
dc.description.sponsorshipSpanish Ministry of Science and Innovation (Project AGL2009-12897-C02-02) and FEDER fundses_ES
dc.description.statusPublishedes_ES
dc.identifier.citationSpanish Journal Of Agricultural Research, 14(4)en
dc.identifier.issn1695-971X*
dc.identifier.urihttp://hdl.handle.net/10532/3568
dc.language.isoenes_ES
dc.relation.doi10.5424/sjar/2016144-9109es_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/es/*
dc.subject.agrovocMaízes
dc.subject.agrovocNitrógenoes
dc.subject.agrovocFotosíntesises
dc.subject.agrovocConductancia estomáticaes
dc.subject.agrovocIntercambio de gaseses
dc.subject.otherSuelos y riegoses_ES
dc.titleNitrogen availability effects on gas exchange measurements in field-grown maize (Zea mays L.) under irrigated Mediterranean conditionsen
dc.typeJournal Contribution*
dc.type.refereedNon-Refereedes_ES
dc.type.specifiedArticlees_ES

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