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Nitrogen fertigation of young navel oranges: Growth, N status, and uptake of fertilizer N

Identifieur interne : 002E27 ( Main/Merge ); précédent : 002E26; suivant : 002E28

Nitrogen fertigation of young navel oranges: Growth, N status, and uptake of fertilizer N

Auteurs : Tom L. Weinert [États-Unis] ; Thomas L. Thompson [États-Unis] ; Scott A. White [États-Unis] ; Michael A. Maurer [États-Unis]

Source :

HortScience [ 0018-5345 ] ; 2002.

RBID : Pascal:03-0325770

Descripteurs français

Pascal (Inist)
- Croissance, Etat nutritionnel, Prélèvement nutriment, Facteur influence, Fertilisation azotée, Fertilisation minérale, Irrigation fertilisante, Irrigation par aspersion, Stade juvénile plante, Citrus sinensis, Azote, Engrais azoté, Essai en champ, Arizona, Accroissement diamètre, Concentration chimique, Distribution concentration, Partition, Partie de plantes, Feuille végétal, Racine, Tige, Tronc végétal, Code bonne pratique, DOSE D'APPLICATION, CALENDRIER DES IRRIGATIONS, Verger, Azote Isotope, Azote 15, Essai en station, Milieu aride, Analyse foliaire, Marquage isotopique, Technique traceur, Composé marqué, Microirrigation.
Wicri :
- topic : Azote, Verger.

English descriptors

KwdEn :
- Arizona, Citrus sinensis, Fertilizing irrigation, Field experiment, Growth, Influence factor, Microirrigation, Mineral fertilization, Nitrogen, Nitrogen fertilization, Nitrogen fertilizer, Nutrient uptake, Nutritional status, Plant juvenile growth stage, Sprinkler irrigation.

Abstract

Microsprinkler irrigation may result in increased efficiency of N and water application to citrus. However, best management practices (BMPs) have not yet been developed for microsprinkler use, particularly on newly established citrus. Experiments were conducted during 1997-98 in central Arizona to evaluate the effects of N rate and fertigation frequency on Newhall' navel oranges (Citrus sinensis) planted in Mar. 1997. Two experiments were conducted, each with factorial combinations of N rate (0 to 204 g/ tree/year) and fertigation frequency (weekly to three times per year). In one experiment, nonlabeled N fertilizer was used, and in the other "N-labeled fertilizer was used. Trunk diameter,leaf N, and ¹⁵N partitioning in the trees were monitored. During 1997, neither trunk diameter nor leaf N were affected by N rate or fertigation frequency. No more than 6% of N applied was found in the trees. During 1998, leaf N in fertilized plots was significantly higher than in nonfertilized plots, but leaf N in all trees remained above the critical N concentration of 25 mg.g^-1. During 1998, no more than 25% of the fertilizer N applied was taken up by the trees. Results suggest that N applications are not needed during the first growing season after planting for microsprinkler-irrigated citrus in Arizona. Only low rates of N (≤68 g/tree'yr) may be needed during the second growing season to maintain adequate tree N reserves.

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Pascal:03-0325770

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Arizona</term>
<term>Citrus sinensis</term>
<term>Fertilizing irrigation</term>
<term>Field experiment</term>
<term>Growth</term>
<term>Influence factor</term>
<term>Microirrigation</term>
<term>Mineral fertilization</term>
<term>Nitrogen</term>
<term>Nitrogen fertilization</term>
<term>Nitrogen fertilizer</term>
<term>Nutrient uptake</term>
<term>Nutritional status</term>
<term>Plant juvenile growth stage</term>
<term>Sprinkler irrigation</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Croissance</term>
<term>Etat nutritionnel</term>
<term>Prélèvement nutriment</term>
<term>Facteur influence</term>
<term>Fertilisation azotée</term>
<term>Fertilisation minérale</term>
<term>Irrigation fertilisante</term>
<term>Irrigation par aspersion</term>
<term>Stade juvénile plante</term>
<term>Citrus sinensis</term>
<term>Azote</term>
<term>Engrais azoté</term>
<term>Essai en champ</term>
<term>Arizona</term>
<term>Accroissement diamètre</term>
<term>Concentration chimique</term>
<term>Distribution concentration</term>
<term>Partition</term>
<term>Partie de plantes</term>
<term>Feuille végétal</term>
<term>Racine</term>
<term>Tige</term>
<term>Tronc végétal</term>
<term>Code bonne pratique</term>
<term>DOSE D'APPLICATION</term>
<term>CALENDRIER DES IRRIGATIONS</term>
<term>Verger</term>
<term>Azote Isotope</term>
<term>Azote 15</term>
<term>Essai en station</term>
<term>Milieu aride</term>
<term>Analyse foliaire</term>
<term>Marquage isotopique</term>
<term>Technique traceur</term>
<term>Composé marqué</term>
<term>Microirrigation</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Azote</term>
<term>Verger</term>
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<front><div type="abstract" xml:lang="en">Microsprinkler irrigation may result in increased efficiency of N and water application to citrus. However, best management practices (BMPs) have not yet been developed for microsprinkler use, particularly on newly established citrus. Experiments were conducted during 1997-98 in central Arizona to evaluate the effects of N rate and fertigation frequency on Newhall' navel oranges (Citrus sinensis) planted in Mar. 1997. Two experiments were conducted, each with factorial combinations of N rate (0 to 204 g/ tree/year) and fertigation frequency (weekly to three times per year). In one experiment, nonlabeled N fertilizer was used, and in the other "N-labeled fertilizer was used. Trunk diameter,leaf N, and <sup>15</sup>
N partitioning in the trees were monitored. During 1997, neither trunk diameter nor leaf N were affected by N rate or fertigation frequency. No more than 6% of N applied was found in the trees. During 1998, leaf N in fertilized plots was significantly higher than in nonfertilized plots, but leaf N in all trees remained above the critical N concentration of 25 mg.g<sup>-1</sup>
. During 1998, no more than 25% of the fertilizer N applied was taken up by the trees. Results suggest that N applications are not needed during the first growing season after planting for microsprinkler-irrigated citrus in Arizona. Only low rates of N (≤68 g/tree'yr) may be needed during the second growing season to maintain adequate tree N reserves.</div>
</front>
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<affiliations><list><country><li>États-Unis</li>
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<region><li>Arizona</li>
<li>Texas</li>
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<name sortKey="Maurer, Michael A" sort="Maurer, Michael A" uniqKey="Maurer M" first="Michael A." last="Maurer">Michael A. Maurer</name>
<name sortKey="Thompson, Thomas L" sort="Thompson, Thomas L" uniqKey="Thompson T" first="Thomas L." last="Thompson">Thomas L. Thompson</name>
<name sortKey="White, Scott A" sort="White, Scott A" uniqKey="White S" first="Scott A." last="White">Scott A. White</name>
</country>
</tree>
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Nitrogen fertigation of young navel oranges: Growth, N status, and uptake of fertilizer N

Nitrogen fertigation of young navel oranges: Growth, N status, and uptake of fertilizer N

Source :

Descripteurs français

English descriptors

Abstract

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

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri