OrangerV1, Main, Exploration, bibRecord, 001581

SEASONAL NITROGEN BUDGETS OF MATURE CITRUS TREES ON A SANDY ENTISOL

Identifieur interne : 001581 ( Main/Exploration ); précédent : 001580; suivant : 001582

SEASONAL NITROGEN BUDGETS OF MATURE CITRUS TREES ON A SANDY ENTISOL

Auteurs : Kelly Morgan [États-Unis] ; Johan Scholberg [Pays-Bas] ; Thomas Obreza [États-Unis] ; Thomas Wheaton [États-Unis]

Source :

Journal of plant nutrition [ 0190-4167 ] ; 2012.

RBID : Pascal:13-0055791

Descripteurs français

Pascal (Inist)
- Variation saisonnière, Bilan azoté, Maturité, Arbre fruitier, Rutaceae, Agrume, Citrus sinensis, Azote, Entisol, Nutrition des plantes.
Wicri :
- topic : Agrume, Azote.

English descriptors

KwdEn :
- Citrus fruit, Citrus sinensis, Entisols, Fruit tree, Maturity, Nitrogen, Nitrogen balance, Plant nutrition, Rutaceae, Seasonal variation.

Abstract

Approximately 30% of Florida citrus is grown on well-drained Entisols with low nutrient-holding capacity, which are prone to high nitrogen (N) leaching losses. However, increasing application frequency of N-fertilizer via multiple fertigations does not increase crop yield, whereas in agronomic crops, such an approach typically enhances N uptake efficiency. We assessed seasonal tree N tissue concentration dynamics as affected by N rate for mature fourteen-year-old 'Hamlin' orange (Citrus sinensis L. Osbeck) trees on either Carrizo citrange (C. sinsensis L. Osbeck X Poncirus trifoliata L. Raf.) or Swingle citrumelo (C. paradisi Macf. X P. trifoliata L. Raf.) rootstocks. Nitrogen was applied as ammonium nitrate in six split fertigation applications with N target values of 179 and 269 kg ha^-1yr^-1. Leaf, twig, and branch bark tissue N concentrations decreased through the spring to minima in May and June. This time period corresponds to a period of high N demand associated with both vegetative and reproductive growth. Tissue N concentrations increased from late spring minimums to fall and winter maximum concentrations. Reduction in branch bark and wood tissue N concentrations may have been due to a redistribution of N to leaf, twig, and fruit tissues in response to low N supply. The majority of the spring N should be supplied prior to May.

Affiliations:

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

to stream PascalFrancis, to step Corpus: 000063
to stream PascalFrancis, to step Curation: 000937
to stream PascalFrancis, to step Checkpoint: 000079
to stream Main, to step Merge: 001597
to stream Main, to step Curation: 001581

Le document en format XML

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<term>Nitrogen</term>
<term>Nitrogen balance</term>
<term>Plant nutrition</term>
<term>Rutaceae</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Variation saisonnière</term>
<term>Bilan azoté</term>
<term>Maturité</term>
<term>Arbre fruitier</term>
<term>Rutaceae</term>
<term>Agrume</term>
<term>Citrus sinensis</term>
<term>Azote</term>
<term>Entisol</term>
<term>Nutrition des plantes</term>
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<front><div type="abstract" xml:lang="en">Approximately 30% of Florida citrus is grown on well-drained Entisols with low nutrient-holding capacity, which are prone to high nitrogen (N) leaching losses. However, increasing application frequency of N-fertilizer via multiple fertigations does not increase crop yield, whereas in agronomic crops, such an approach typically enhances N uptake efficiency. We assessed seasonal tree N tissue concentration dynamics as affected by N rate for mature fourteen-year-old 'Hamlin' orange (Citrus sinensis L. Osbeck) trees on either Carrizo citrange (C. sinsensis L. Osbeck X Poncirus trifoliata L. Raf.) or Swingle citrumelo (C. paradisi Macf. X P. trifoliata L. Raf.) rootstocks. Nitrogen was applied as ammonium nitrate in six split fertigation applications with N target values of 179 and 269 kg ha<sup>-1 </sup>
yr<sup>-1</sup>
. Leaf, twig, and branch bark tissue N concentrations decreased through the spring to minima in May and June. This time period corresponds to a period of high N demand associated with both vegetative and reproductive growth. Tissue N concentrations increased from late spring minimums to fall and winter maximum concentrations. Reduction in branch bark and wood tissue N concentrations may have been due to a redistribution of N to leaf, twig, and fruit tissues in response to low N supply. The majority of the spring N should be supplied prior to May.</div>
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<country name="Pays-Bas"><region name="Gueldre (province)"><name sortKey="Scholberg, Johan" sort="Scholberg, Johan" uniqKey="Scholberg J" first="Johan" last="Scholberg">Johan Scholberg</name>
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SEASONAL NITROGEN BUDGETS OF MATURE CITRUS TREES ON A SANDY ENTISOL

SEASONAL NITROGEN BUDGETS OF MATURE CITRUS TREES ON A SANDY ENTISOL

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