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BORON UPTAKE AND DISTRIBUTION IN FIELD GROWN CITRUS TREES

Identifieur interne : 001965 ( Main/Exploration ); précédent : 001964; suivant : 001966

BORON UPTAKE AND DISTRIBUTION IN FIELD GROWN CITRUS TREES

Auteurs : Rodrigo Marcelli Boaretto [Brésil] ; Jose Antonio Quaggio [Brésil] ; Dirceu Jr Mattos [Brésil] ; Takashi Muraoka [Brésil] ; Antonio Enedi Boaretto [Brésil]

Source :

RBID : Pascal:11-0353861

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English descriptors

Abstract

In low fertility tropical soils, boron (B) deficiency impairs fruit production. However, little information is available on the efficiency of nutrient application and use by trees. Therefore, this work verified the effects of soil and foliar applications of boron in a commercial citrus orchard. An experiment was conducted with fertigated 4-year-old 'Valencia' sweet orange trees on 'Swingle' citrumelo rootstock. Boron (isotopically-enriched 10B) was supplied to trees once or twice in the growing season, either dripped in the soil or sprayed on the leaves. Trees were sampled at different periods and separated into different parts for total B contents and 10B/11B isotope ratios analyses. Soil B applied via fertigation was more efficient than foliar application for the organs grown after the B fertilization. Recovery of labeled B by fruits was 21 % for fertigation and 7% for foliar application. Residual effects of nutrient application in the grove were observed in the year after labeled fertilizer application, which greater proportions derived from the soil supply.


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Le document en format XML

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<term>Absorption</term>
<term>Boron</term>
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<term>Distribution</term>
<term>Fertigation</term>
<term>Field crop</term>
<term>Foliar application</term>
<term>Fruit tree</term>
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<term>Absorption</term>
<term>Distribution</term>
<term>Culture plein champ</term>
<term>Arbre fruitier</term>
<term>Isotope</term>
<term>Technique</term>
<term>Irrigation fertilisante</term>
<term>Feuille végétal</term>
<term>Pulvérisation</term>
<term>Rutaceae</term>
<term>Agrume</term>
<term>Citrus sinensis</term>
<term>Bore</term>
<term>Application foliaire</term>
<term>Nutrition des plantes</term>
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<div type="abstract" xml:lang="en">In low fertility tropical soils, boron (B) deficiency impairs fruit production. However, little information is available on the efficiency of nutrient application and use by trees. Therefore, this work verified the effects of soil and foliar applications of boron in a commercial citrus orchard. An experiment was conducted with fertigated 4-year-old 'Valencia' sweet orange trees on 'Swingle' citrumelo rootstock. Boron (isotopically-enriched
<sup>10</sup>
B) was supplied to trees once or twice in the growing season, either dripped in the soil or sprayed on the leaves. Trees were sampled at different periods and separated into different parts for total B contents and
<sup>10</sup>
B/
<sup>11</sup>
B isotope ratios analyses. Soil B applied via fertigation was more efficient than foliar application for the organs grown after the B fertilization. Recovery of labeled B by fruits was 21 % for fertigation and 7% for foliar application. Residual effects of nutrient application in the grove were observed in the year after labeled fertilizer application, which greater proportions derived from the soil supply.</div>
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