OrangerV1, PascalFrancis, Corpus, bibRecord, 000118

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

Identifieur interne : 000118 ( PascalFrancis/Corpus ); précédent : 000117; suivant : 000119

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

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

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.

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.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A11	`02`	`1`		`@1 QUINONES (Ana)`
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A11	`04`	`1`		`@1 PRIMO-MILLO (Eduardo)`
A14	`01`			`@1 Instituto Valenciano de Investigaciones Agrarias. Ctra. Moncada-Náquera km. 4,5, Apdo @2 46113 Moncada. Valencia @3 ESP @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut.`
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C01	`01`		`ENG`	@0 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.
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Format Inist (serveur)

NO :	PASCAL 12-0197401 INIST
ET :	Nitrogen-use efficiency of young citrus trees as influenced by the timing of fertilizer application
AU :	MARTINEZ-ALCANTARA (Belén); QUINONES (Ana); LEGAZ (Francisco); PRIMO-MILLO (Eduardo)
AF :	Instituto Valenciano de Investigaciones Agrarias. Ctra. Moncada-Náquera km. 4,5, Apdo/46113 Moncada. Valencia/Espagne (1 aut., 2 aut., 3 aut., 4 aut.)
DT :	Publication en série; Niveau analytique
SO :	Journal of plant nutrition and soil science : (1999); ISSN 1436-8730; Allemagne; Da. 2012; Vol. 175; No. 2; Pp. 282-292; Bibl. 1 p.3/4
LA :	Anglais
EA :	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.
CC :	002A32B; 002A32C02B
FD :	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
FG :	Dicotyledones; Angiospermae; Spermatophyta; Plante fruitière; Stade développement; Aménagement sol; Méthode nucléaire; Méthode physique; Isotope stable
ED :	Nutrient recovery; Plant juvenile growth stage; Fruit tree; Influence factor; Application method; Fertilization; Fertigation; Isotope labelling; Recovery; Rutaceae; Citrus fruit; Citrus sinensis; Fertilizers; Nutrient uptake; Soil science; Soil plant relation; Nitrogen-15
EG :	Dicotyledones; Angiospermae; Spermatophyta; Fruit crop; Developmental stage; Soil management; Nuclear method; Physical method
SD :	Eficacia nutrimento; Estado juvenil planta; Arbol frutal; Factor influencia; Modalidad tratamiento; Fertilización; Riego fertilizante; Marcación isotópica; Recuperación; Rutaceae; Agrios; Citrus sinensis; Fertilizante; Absorción nutriente; Ciencia del suelo; Relación suelo planta; Nitrógeno-15
LO :	INIST-4185.354000509688180120
ID :	12-0197401

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Le document en format XML

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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>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>1436-8730</s0>
</fA01>
<fA03 i2="1"><s0>J. plant nutr. soil sci. : (1999)</s0>
</fA03>
<fA05><s2>175</s2>
</fA05>
<fA06><s2>2</s2>
</fA06>
<fA08 i1="01" i2="1" l="ENG"><s1>Nitrogen-use efficiency of young citrus trees as influenced by the timing of fertilizer application</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>MARTINEZ-ALCANTARA (Belén)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>QUINONES (Ana)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>LEGAZ (Francisco)</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>PRIMO-MILLO (Eduardo)</s1>
</fA11>
<fA14 i1="01"><s1>Instituto Valenciano de Investigaciones Agrarias. Ctra. Moncada-Náquera km. 4,5, Apdo</s1>
<s2>46113 Moncada. Valencia</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</fA14>
<fA20><s1>282-292</s1>
</fA20>
<fA21><s1>2012</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>4185</s2>
<s5>354000509688180120</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2012 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>1 p.3/4</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>12-0197401</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>Journal of plant nutrition and soil science : (1999)</s0>
</fA64>
<fA66 i1="01"><s0>DEU</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>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.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>002A32B</s0>
</fC02>
<fC02 i1="02" i2="X"><s0>002A32C02B</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Efficacité nutriment</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Nutrient recovery</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Eficacia nutrimento</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Stade juvénile plante</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Plant juvenile growth stage</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Estado juvenil planta</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Arbre fruitier</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Fruit tree</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Arbol frutal</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Facteur influence</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Influence factor</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Factor influencia</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Modalité traitement</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Application method</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Modalidad tratamiento</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Fertilisation</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Fertilization</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Fertilización</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Irrigation fertilisante</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Fertigation</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Riego fertilizante</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Marquage isotopique</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Isotope labelling</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Marcación isotópica</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Récupération</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Recovery</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Recuperación</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Rutaceae</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Rutaceae</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Rutaceae</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Agrume</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Citrus fruit</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Agrios</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Engrais</s0>
<s5>15</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Fertilizers</s0>
<s5>15</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Fertilizante</s0>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Prélèvement nutriment</s0>
<s5>28</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Nutrient uptake</s0>
<s5>28</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Absorción nutriente</s0>
<s5>28</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Science du sol</s0>
<s5>29</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG"><s0>Soil science</s0>
<s5>29</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA"><s0>Ciencia del suelo</s0>
<s5>29</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE"><s0>Relation sol plante</s0>
<s5>30</s5>
</fC03>
<fC03 i1="16" i2="X" l="ENG"><s0>Soil plant relation</s0>
<s5>30</s5>
</fC03>
<fC03 i1="16" i2="X" l="SPA"><s0>Relación suelo planta</s0>
<s5>30</s5>
</fC03>
<fC03 i1="17" i2="X" l="FRE"><s0>Azote 15</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="17" i2="X" l="ENG"><s0>Nitrogen-15</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="17" i2="X" l="SPA"><s0>Nitrógeno-15</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="ENG"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="SPA"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="FRE"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="ENG"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="SPA"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="FRE"><s0>Plante fruitière</s0>
<s5>31</s5>
</fC07>
<fC07 i1="04" i2="X" l="ENG"><s0>Fruit crop</s0>
<s5>31</s5>
</fC07>
<fC07 i1="04" i2="X" l="SPA"><s0>Planta frutal</s0>
<s5>31</s5>
</fC07>
<fC07 i1="05" i2="X" l="FRE"><s0>Stade développement</s0>
<s5>33</s5>
</fC07>
<fC07 i1="05" i2="X" l="ENG"><s0>Developmental stage</s0>
<s5>33</s5>
</fC07>
<fC07 i1="05" i2="X" l="SPA"><s0>Grado desarrollo</s0>
<s5>33</s5>
</fC07>
<fC07 i1="06" i2="X" l="FRE"><s0>Aménagement sol</s0>
<s5>34</s5>
</fC07>
<fC07 i1="06" i2="X" l="ENG"><s0>Soil management</s0>
<s5>34</s5>
</fC07>
<fC07 i1="06" i2="X" l="SPA"><s0>Acondicionamiento suelo</s0>
<s5>34</s5>
</fC07>
<fC07 i1="07" i2="X" l="FRE"><s0>Méthode nucléaire</s0>
<s5>35</s5>
</fC07>
<fC07 i1="07" i2="X" l="ENG"><s0>Nuclear method</s0>
<s5>35</s5>
</fC07>
<fC07 i1="07" i2="X" l="SPA"><s0>Método nuclear</s0>
<s5>35</s5>
</fC07>
<fC07 i1="08" i2="X" l="FRE"><s0>Méthode physique</s0>
<s5>36</s5>
</fC07>
<fC07 i1="08" i2="X" l="ENG"><s0>Physical method</s0>
<s5>36</s5>
</fC07>
<fC07 i1="08" i2="X" l="SPA"><s0>Método físico</s0>
<s5>36</s5>
</fC07>
<fC07 i1="09" i2="X" l="FRE"><s0>Isotope stable</s0>
<s4>INC</s4>
<s5>68</s5>
</fC07>
<fN21><s1>156</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 12-0197401 INIST</NO>
<ET>Nitrogen-use efficiency of young citrus trees as influenced by the timing of fertilizer application</ET>
<AU>MARTINEZ-ALCANTARA (Belén); QUINONES (Ana); LEGAZ (Francisco); PRIMO-MILLO (Eduardo)</AU>
<AF>Instituto Valenciano de Investigaciones Agrarias. Ctra. Moncada-Náquera km. 4,5, Apdo/46113 Moncada. Valencia/Espagne (1 aut., 2 aut., 3 aut., 4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of plant nutrition and soil science : (1999); ISSN 1436-8730; Allemagne; Da. 2012; Vol. 175; No. 2; Pp. 282-292; Bibl. 1 p.3/4</SO>
<LA>Anglais</LA>
<EA>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.</EA>
<CC>002A32B; 002A32C02B</CC>
<FD>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</FD>
<FG>Dicotyledones; Angiospermae; Spermatophyta; Plante fruitière; Stade développement; Aménagement sol; Méthode nucléaire; Méthode physique; Isotope stable</FG>
<ED>Nutrient recovery; Plant juvenile growth stage; Fruit tree; Influence factor; Application method; Fertilization; Fertigation; Isotope labelling; Recovery; Rutaceae; Citrus fruit; Citrus sinensis; Fertilizers; Nutrient uptake; Soil science; Soil plant relation; Nitrogen-15</ED>
<EG>Dicotyledones; Angiospermae; Spermatophyta; Fruit crop; Developmental stage; Soil management; Nuclear method; Physical method</EG>
<SD>Eficacia nutrimento; Estado juvenil planta; Arbol frutal; Factor influencia; Modalidad tratamiento; Fertilización; Riego fertilizante; Marcación isotópica; Recuperación; Rutaceae; Agrios; Citrus sinensis; Fertilizante; Absorción nutriente; Ciencia del suelo; Relación suelo planta; Nitrógeno-15</SD>
<LO>INIST-4185.354000509688180120</LO>
<ID>12-0197401</ID>
</server>
</inist>
</record>

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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

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