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Nitrogen-use efficiency of young citrus trees as influenced by the timing of fertilizer application

Identifieur interne : 001591 ( Main/Exploration ); précédent : 001590; suivant : 001592

Nitrogen-use efficiency of young citrus trees as influenced by the timing of fertilizer application

Auteurs : Belén Martinez-Alcantara [Espagne] ; Ana Quinones [Espagne] ; Francisco Legaz [Espagne] ; Eduardo Primo-Millo [Espagne]

Source :

Journal of plant nutrition and soil science : (1999) [ 1436-8730 ] ; 2012.

RBID : Pascal:12-0197401

Descripteurs français

Pascal (Inist)
- Efficacité nutriment, Stade juvénile plante, Arbre fruitier, Facteur influence, Modalité traitement, Fertilisation, Irrigation fertilisante, Marquage isotopique, Récupération, Rutaceae, Agrume, Citrus sinensis, Engrais, Prélèvement nutriment, Science du sol, Relation sol plante, Azote 15.
Wicri :
- topic : Agrume, Engrais.

English descriptors

KwdEn :
- Application method, Citrus fruit, Citrus sinensis, Fertigation, Fertilization, Fertilizers, Fruit tree, Influence factor, Isotope labelling, Nitrogen-15, Nutrient recovery, Nutrient uptake, Plant juvenile growth stage, Recovery, Rutaceae, Soil plant relation, Soil science.

Abstract

The aim of this study was to improve the fertilizer-nitrogen-use efficiency (NUE) for a sustainable citrus production where yield, fruit quality, and environment are reconciled. A soil pot experiment was conducted using 5-year-old orange trees (Citrus sinensis cv. Navel Lane Late) to determine the response of NUE to timing of N-fertilizer supply. An equal N rate (50 g tree^-1) following two seasonal supply distributions was tested: (1) ENS (early supply from March to June of 75% of the N rate, with the remaining 25% administered between July and October) and (2) LNS (late supply of the bulk of the N rate with 25% between March and June and 75% between July and October). Labeled fertilizer (5 atom% ¹⁵N excess) was applied in order to accurately quantify N uptake, its partitioning among plant-soil compartments and NUE at the end of fruit drop and at fruit maturity. LNS resulted in a significant increase in NUE in both stages (up to 19% at the end of fruit drop and 9% at fruit maturity), while also increasing summer/autumn flush development. ENS showed lower fruit abscission, an enhanced final fruit load (up to 45%), and a more profuse development of spring flush. It is worth mentioning that LNS led to higher ¹⁵N content in the majority of the tree storage organs available for next spring growth resumption. The amount of ¹⁵N remaining in the soil of ENS trees at the end of the trial, which represented 16% of the supplied ¹⁵N, was 1.5-fold higher than that of LNS trees as a result of the lower NUE of the former. Irrespective of the seasonal distribution of the fertilizer, mean ¹⁵N recovery in the soil-plant system at the end of the trial was about 71 %. The results clearly confirm that the N seasonal distribution curve affects NUE in young citrus trees and NUE increases when the bulk of supply of the N rate is delayed to the summer months.

Affiliations:

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Le document en format XML

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<term>Fertilizers</term>
<term>Fruit tree</term>
<term>Influence factor</term>
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<term>Stade juvénile plante</term>
<term>Arbre fruitier</term>
<term>Facteur influence</term>
<term>Modalité traitement</term>
<term>Fertilisation</term>
<term>Irrigation fertilisante</term>
<term>Marquage isotopique</term>
<term>Récupération</term>
<term>Rutaceae</term>
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<term>Citrus sinensis</term>
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<front><div type="abstract" xml:lang="en">The aim of this study was to improve the fertilizer-nitrogen-use efficiency (NUE) for a sustainable citrus production where yield, fruit quality, and environment are reconciled. A soil pot experiment was conducted using 5-year-old orange trees (Citrus sinensis cv. Navel Lane Late) to determine the response of NUE to timing of N-fertilizer supply. An equal N rate (50 g tree<sup>-1</sup>
) following two seasonal supply distributions was tested: (1) ENS (early supply from March to June of 75% of the N rate, with the remaining 25% administered between July and October) and (2) LNS (late supply of the bulk of the N rate with 25% between March and June and 75% between July and October). Labeled fertilizer (5 atom% <sup>15</sup>
N excess) was applied in order to accurately quantify N uptake, its partitioning among plant-soil compartments and NUE at the end of fruit drop and at fruit maturity. LNS resulted in a significant increase in NUE in both stages (up to 19% at the end of fruit drop and 9% at fruit maturity), while also increasing summer/autumn flush development. ENS showed lower fruit abscission, an enhanced final fruit load (up to 45%), and a more profuse development of spring flush. It is worth mentioning that LNS led to higher <sup>15</sup>
N content in the majority of the tree storage organs available for next spring growth resumption. The amount of <sup>15</sup>
N remaining in the soil of ENS trees at the end of the trial, which represented 16% of the supplied <sup>15</sup>
N, was 1.5-fold higher than that of LNS trees as a result of the lower NUE of the former. Irrespective of the seasonal distribution of the fertilizer, mean <sup>15</sup>
N recovery in the soil-plant system at the end of the trial was about 71 %. The results clearly confirm that the N seasonal distribution curve affects NUE in young citrus trees and NUE increases when the bulk of supply of the N rate is delayed to the summer months.</div>
</front>
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<name sortKey="Legaz, Francisco" sort="Legaz, Francisco" uniqKey="Legaz F" first="Francisco" last="Legaz">Francisco Legaz</name>
<name sortKey="Primo Millo, Eduardo" sort="Primo Millo, Eduardo" uniqKey="Primo Millo E" first="Eduardo" last="Primo-Millo">Eduardo Primo-Millo</name>
<name sortKey="Quinones, Ana" sort="Quinones, Ana" uniqKey="Quinones A" first="Ana" last="Quinones">Ana Quinones</name>
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Nitrogen-use efficiency of young citrus trees as influenced by the timing of fertilizer application

Nitrogen-use efficiency of young citrus trees as influenced by the timing of fertilizer application

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri