OrangerV1, Main, Exploration, bibRecord, 003246

Nitrogen management for high yield and quality of citrus in sandy soils

Identifieur interne : 003246 ( Main/Exploration ); précédent : 003245; suivant : 003247

Nitrogen management for high yield and quality of citrus in sandy soils

Auteurs : A. K. Alva [États-Unis] ; S. Paramasivam [États-Unis]

Source :

Soil Science Society of America journal [ 0361-5995 ] ; 1998.

RBID : Pascal:99-0152610

Descripteurs français

Pascal (Inist)
- Fertilisation azotée, Fertilisation raisonnée, Irrigation, Irrigation fertilisante, Lixiviation souterraine, Qualité production, Relation dose réponse, Rendement, Source, Verger, Citrus reticulata, Citrus sinensis, Azote, Engrais action lente, Engrais azoté, Engrais granulé, Engrais liquide, Nitrate, Solution édaphique, Entisol, Sol cultivé, Sol sableux, Analyse foliaire, Essai en champ, Floride, Quartzipsamment typique, SOL DE VERGER.
Wicri :
- topic : Irrigation, Verger, Azote.

English descriptors

KwdEn :
- Citrus reticulata, Citrus sinensis, Cultivated soil, Dose activity relation, Entisols, Fertilizing irrigation, Field experiment, Florida, Foliar analysis, Granulated fertilizer, Irrigation, Liquid fertilizer, Managed fertilization, Nitrates, Nitrogen, Nitrogen fertilization, Nitrogen fertilizer, ORCHARD SOILS, Orchard, Production quality, Sandy soil, Slow releasing fertilizer, Soil solution, Source, Underground leaching, Yield.

Abstract

We are in the process of developing N best management practices for citrus in sandy Entisols to Increase N uptake efficiency and to minimize NO₃ leaching below the rooting depth. We evaluated the effects of N sources as either dry granular form (DGF), fertigation (FRT), or controlled-release fertilizer (CRF), and rates (56-280 kg N ha^-1 yr^-1) with optimum irrigation management on: (i) the fruit yield and quality and leaf nutrient concentrations of bearing 'Hamlin' orange [Citrus sinensis (L.) Osbeck] trees on 'Cleopatra' mandarin (Citrus reticulata Blanco) rootstock (planted in 1974) grown in a Tavares fine sand (hyperthermic, uncoated Typic Quartzipsamments) and (ii) changes in NO₃-N status in soil solution sampled from the vadose zone both within and below the root zone. For the DGF and FRT sources, 3-yr mean fruit yield increased with an increase in N rates in the range of 112 to 224 kg ha^-1 yr^-1. For further increase in N rate, the fruit yield showed a diminishing response, which was quite marked for the DGF. The N requirements for 1 Mg of fruit, mean across all N rates, were 1.79, 2.58, and 2.75 kg N for the CRF, FRT, and DGF sources, respectively. Leaf N concentrations were maintained within the optimal range (25-27 g kg^-1) at N rates ≥168 kg ha^-1 yr^-1, regardless of source of N. Various N rates and sources did not significantly affect the fruit size, nor juice quality parameters. The improved management of irrigation and fertilizer placement and timing of application contributed to minimized leaching of NO₃-N below the root zone.

Affiliations:

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Citrus reticulata</term>
<term>Citrus sinensis</term>
<term>Cultivated soil</term>
<term>Dose activity relation</term>
<term>Entisols</term>
<term>Fertilizing irrigation</term>
<term>Field experiment</term>
<term>Florida</term>
<term>Foliar analysis</term>
<term>Granulated fertilizer</term>
<term>Irrigation</term>
<term>Liquid fertilizer</term>
<term>Managed fertilization</term>
<term>Nitrates</term>
<term>Nitrogen</term>
<term>Nitrogen fertilization</term>
<term>Nitrogen fertilizer</term>
<term>ORCHARD SOILS</term>
<term>Orchard</term>
<term>Production quality</term>
<term>Sandy soil</term>
<term>Slow releasing fertilizer</term>
<term>Soil solution</term>
<term>Source</term>
<term>Underground leaching</term>
<term>Yield</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Fertilisation azotée</term>
<term>Fertilisation raisonnée</term>
<term>Irrigation</term>
<term>Irrigation fertilisante</term>
<term>Lixiviation souterraine</term>
<term>Qualité production</term>
<term>Relation dose réponse</term>
<term>Rendement</term>
<term>Source</term>
<term>Verger</term>
<term>Citrus reticulata</term>
<term>Citrus sinensis</term>
<term>Azote</term>
<term>Engrais action lente</term>
<term>Engrais azoté</term>
<term>Engrais granulé</term>
<term>Engrais liquide</term>
<term>Nitrate</term>
<term>Solution édaphique</term>
<term>Entisol</term>
<term>Sol cultivé</term>
<term>Sol sableux</term>
<term>Analyse foliaire</term>
<term>Essai en champ</term>
<term>Floride</term>
<term>Quartzipsamment typique</term>
<term>SOL DE VERGER</term>
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<term>Azote</term>
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<front><div type="abstract" xml:lang="en">We are in the process of developing N best management practices for citrus in sandy Entisols to Increase N uptake efficiency and to minimize NO<sub>3</sub>
 leaching below the rooting depth. We evaluated the effects of N sources as either dry granular form (DGF), fertigation (FRT), or controlled-release fertilizer (CRF), and rates (56-280 kg N ha<sup>-1</sup>
 yr<sup>-1</sup>
) with optimum irrigation management on: (i) the fruit yield and quality and leaf nutrient concentrations of bearing 'Hamlin' orange [Citrus sinensis (L.) Osbeck] trees on 'Cleopatra' mandarin (Citrus reticulata Blanco) rootstock (planted in 1974) grown in a Tavares fine sand (hyperthermic, uncoated Typic Quartzipsamments) and (ii) changes in NO<sub>3</sub>
-N status in soil solution sampled from the vadose zone both within and below the root zone. For the DGF and FRT sources, 3-yr mean fruit yield increased with an increase in N rates in the range of 112 to 224 kg ha<sup>-1</sup>
 yr<sup>-1</sup>
. For further increase in N rate, the fruit yield showed a diminishing response, which was quite marked for the DGF. The N requirements for 1 Mg of fruit, mean across all N rates, were 1.79, 2.58, and 2.75 kg N for the CRF, FRT, and DGF sources, respectively. Leaf N concentrations were maintained within the optimal range (25-27 g kg<sup>-1</sup>
) at N rates ≥168 kg ha<sup>-1</sup>
 yr<sup>-1</sup>
, regardless of source of N. Various N rates and sources did not significantly affect the fruit size, nor juice quality parameters. The improved management of irrigation and fertilizer placement and timing of application contributed to minimized leaching of NO<sub>3</sub>
-N below the root zone.</div>
</front>
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<affiliations><list><country><li>États-Unis</li>
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<name sortKey="Paramasivam, S" sort="Paramasivam, S" uniqKey="Paramasivam S" first="S." last="Paramasivam">S. Paramasivam</name>
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Nitrogen management for high yield and quality of citrus in sandy soils

Nitrogen management for high yield and quality of citrus in sandy soils

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