Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus
ABSTRACT This study evaluated leaf supply of zinc (Zn) and boron (B) using either soluble or sparingly soluble fertilizers in young sweet orange trees. Three experiments were set up in a greenhouse to compare two sources and four doses (control, low, adequate and high) of fertilizers as follows: (i) Experiment I (B): boric acid and calcium borate; (ii) Experiment II (Zn): Zn sulfate and Zn oxide; and (iii) Experiment III (B + Zn): boric acid + Zn Sulfate and Zn Borate. The sparingly soluble sources were effective in increasing the Zn and B leaf concentration. Dry matter of the aerial part increased 18 % with B applications in adequate concentration independent of the B fertilizer sources. In contrast, trees did not grow well with applications of adequate concentration of Zn as Zn Sulfate or high Zn concentration as Zn borate. Superoxide dismutase activity in leaves increased with applications of low concentration of Zn as Zn oxide and decreased with high concentration of Zn from either source. Polyphenol oxidase activity increased with application of adequate concentration of B as boric acid and high concentration of B as calcium borate. Furthermore, the upper concentrations of Zn were toxic in orange trees when the source was Zn sulfate. Increases in plant growth without damage to leaf tissue and positive responses of key enzymes of orange trees in a range of nutrient concentration applications demonstrated the practical use of sparingly soluble fertilizers to supplying B and Zn foliarily to plants.
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Escola Superior de Agricultura "Luiz de Queiroz"
2021
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oai:scielo:S0103-901620210001014012020-03-10Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrusMacedo,Luiza OliveiraMattos Júnior,DirceuJacobassi,RodrigoHippler,Franz Walter RiegerQuaggio,José AntônioBoaretto,Rodrigo Marcelli micronutrients microparticles leaf spraying fertilizer use ABSTRACT This study evaluated leaf supply of zinc (Zn) and boron (B) using either soluble or sparingly soluble fertilizers in young sweet orange trees. Three experiments were set up in a greenhouse to compare two sources and four doses (control, low, adequate and high) of fertilizers as follows: (i) Experiment I (B): boric acid and calcium borate; (ii) Experiment II (Zn): Zn sulfate and Zn oxide; and (iii) Experiment III (B + Zn): boric acid + Zn Sulfate and Zn Borate. The sparingly soluble sources were effective in increasing the Zn and B leaf concentration. Dry matter of the aerial part increased 18 % with B applications in adequate concentration independent of the B fertilizer sources. In contrast, trees did not grow well with applications of adequate concentration of Zn as Zn Sulfate or high Zn concentration as Zn borate. Superoxide dismutase activity in leaves increased with applications of low concentration of Zn as Zn oxide and decreased with high concentration of Zn from either source. Polyphenol oxidase activity increased with application of adequate concentration of B as boric acid and high concentration of B as calcium borate. Furthermore, the upper concentrations of Zn were toxic in orange trees when the source was Zn sulfate. Increases in plant growth without damage to leaf tissue and positive responses of key enzymes of orange trees in a range of nutrient concentration applications demonstrated the practical use of sparingly soluble fertilizers to supplying B and Zn foliarily to plants.info:eu-repo/semantics/openAccessEscola Superior de Agricultura "Luiz de Queiroz"Scientia Agricola v.78 n.1 20212021-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000101401en10.1590/1678-992x-2018-0387 |
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Macedo,Luiza Oliveira Mattos Júnior,Dirceu Jacobassi,Rodrigo Hippler,Franz Walter Rieger Quaggio,José Antônio Boaretto,Rodrigo Marcelli |
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Macedo,Luiza Oliveira Mattos Júnior,Dirceu Jacobassi,Rodrigo Hippler,Franz Walter Rieger Quaggio,José Antônio Boaretto,Rodrigo Marcelli Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus |
author_facet |
Macedo,Luiza Oliveira Mattos Júnior,Dirceu Jacobassi,Rodrigo Hippler,Franz Walter Rieger Quaggio,José Antônio Boaretto,Rodrigo Marcelli |
author_sort |
Macedo,Luiza Oliveira |
title |
Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus |
title_short |
Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus |
title_full |
Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus |
title_fullStr |
Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus |
title_full_unstemmed |
Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus |
title_sort |
efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus |
description |
ABSTRACT This study evaluated leaf supply of zinc (Zn) and boron (B) using either soluble or sparingly soluble fertilizers in young sweet orange trees. Three experiments were set up in a greenhouse to compare two sources and four doses (control, low, adequate and high) of fertilizers as follows: (i) Experiment I (B): boric acid and calcium borate; (ii) Experiment II (Zn): Zn sulfate and Zn oxide; and (iii) Experiment III (B + Zn): boric acid + Zn Sulfate and Zn Borate. The sparingly soluble sources were effective in increasing the Zn and B leaf concentration. Dry matter of the aerial part increased 18 % with B applications in adequate concentration independent of the B fertilizer sources. In contrast, trees did not grow well with applications of adequate concentration of Zn as Zn Sulfate or high Zn concentration as Zn borate. Superoxide dismutase activity in leaves increased with applications of low concentration of Zn as Zn oxide and decreased with high concentration of Zn from either source. Polyphenol oxidase activity increased with application of adequate concentration of B as boric acid and high concentration of B as calcium borate. Furthermore, the upper concentrations of Zn were toxic in orange trees when the source was Zn sulfate. Increases in plant growth without damage to leaf tissue and positive responses of key enzymes of orange trees in a range of nutrient concentration applications demonstrated the practical use of sparingly soluble fertilizers to supplying B and Zn foliarily to plants. |
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Escola Superior de Agricultura "Luiz de Queiroz" |
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2021 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000101401 |
work_keys_str_mv |
AT macedoluizaoliveira efficiencyoffoliarapplicationofsparinglysolublesourcesofboronandzincincitrus AT mattosjuniordirceu efficiencyoffoliarapplicationofsparinglysolublesourcesofboronandzincincitrus AT jacobassirodrigo efficiencyoffoliarapplicationofsparinglysolublesourcesofboronandzincincitrus AT hipplerfranzwalterrieger efficiencyoffoliarapplicationofsparinglysolublesourcesofboronandzincincitrus AT quaggiojoseantonio efficiencyoffoliarapplicationofsparinglysolublesourcesofboronandzincincitrus AT boarettorodrigomarcelli efficiencyoffoliarapplicationofsparinglysolublesourcesofboronandzincincitrus |
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1756407162411679744 |