Use of sparingly soluble micronutrients sources for citrus production

Macedo, Luisa O.; Boaretto, Rodrigo Marcelli; Jacobassi, Rodrigo; Carr, Natalia Fernandes; Quaggio, J. A.; Mattos, Dirceu

doi:10.4322/crt.icc099

Cited by 4 publications

(4 citation statements)

References 30 publications

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“…Além disso, os micronutrientes possuem baixa mobilidade no floema, sendo necessárias aplicações contínuas conforme as brotações vão ocorrendo. Por fim, o suprimento de micronutrientes deve ser realizado por múltiplas aplicações, sendo frequentemente associado a outras práticas culturais para o controle de problemas fitossanitários e não necessariamente nos momentos em que a demanda por micronutrientes seja maior (BOARETTO et al, 2002;FERNÁNDEZ et al, 2013;MACEDO et al, 2017).…”

Section: Resultsunclassified

Diagnóstico nutricional de pomares de laranjeiras da Fronteira Oeste do Rio Grande do Sul

Griebeler

Gonzatto

Scivittaro

et al. 2020

PESQ. AGROP. GAÚCHA

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A Fronteira Oeste do Rio Grande do Sul (RS) vem se destacando pela diversificação produtiva e pelo desenvolvimento do setor frutícola. A adequada nutrição dos pomares é um dos fatores essenciais para garantir o sucesso da atividade nessa nova região produtora. Devido à escassez de dados referentes à citricultura da região da Fronteira Oeste do RS, objetivou-se, neste trabalho, avaliar o estado nutricional de laranjeiras ‘Lane late’, ‘Navelina’, ‘Salustiana’, ‘Valência’, ‘Valência Midknight’ e ‘Valência Delta Seedless’ enxertadas sob Poncirus trifoliata nas condições edafoclimáticas da região. Os pomares em que se realizaram as amostragens foram constituídos por plantas adultas. Os pomares de laranjeiras da Fronteira Oeste do RS apresentam, de forma geral, deficiência foliar em N, Ca, Mn e Zn, apresentando, ainda, excesso foliar de Cu e P, indicando necessidade de adequação do manejo do solo e da adubação, visando o aumento no conteúdo de matéria-orgânica do solo, o parcelamento da adubação nitrogenada e o aprimoramento da adubação com Mn e Zn.

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Section: Resultsunclassified

Diagnóstico nutricional de pomares de laranjeiras da Fronteira Oeste do Rio Grande do Sul

Griebeler

Gonzatto

Scivittaro

et al. 2020

PESQ. AGROP. GAÚCHA

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“…Foliar application of micronutrients increases the photosynthetic compounds inside the plant tissue which leads to reduces the leaf drop and reflects on the productivity (Suresh et al, 2018). A balanced supply between macro and micronutrients is required for optimum tree growth and fruit yield (Macedo et al, 2017). Spraying citrus trees with micronutrients was found to be effective on increasing the yield (Karim et al, 1996;Rahman and Haq, 2006;Tariq et al, 2007;Mohamed et al, 2009;Kumari et al, 2009;Razzaq et al, 2013;Kaur et al, 2015;Meena et al, 2017;Noor et al, 2019;Rakhonde andZope, 2020 andReetika et al, 2020).…”

Section: Fruit Number/treementioning

confidence: 99%

Effect of potassium, microelements and seaweed extract spraying on yield and fruit quality of Balady mandarin (Citrus reticulate Blanco)

Kenawy

Mohamed

Ibrahim

et al. 2022

AJAS

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This study was carried out during three successive seasons of 2019, 2020 and 2021 on 25 years old Balady mandarin trees budded on sour orange root stock and planted at 5 x 5 m apart.The selected trees grown at the experimental orchard of Faculty of Agriculture, Assiut University Egypt. Where the soil has a clay texture and welldraining, surface irrigation was used. Therefore, this study aimed to investigate the effect of seaweed extract, potassium and micronutrients on yield and fruit quality of Balady Mandarin trees.Forty-eight healthy trees, uniform in vigor as possible were chosen. The chosen trees were divided into eight different treatments including the control. The selected trees received four sprays from each treatment at full bloom, just after fruit setting, first week of July and September.Treatments were arranged in a randomized complete block design with three replications per treatment, two trees each. All the studied treatments significantly increased yield, fruit physical and chemical properties and decreased total acidity %. The best treatments during the three study seasons were spraying with potassium at 2% + micronutrients at 3% + seaweed extracts at 2%. According to the previous results, it could be concluded that spraying Balady mandarin trees with liquid potassium 2% + micronutrients 3% + seaweed extracts 2% four sprays at full bloom, just after fruit set, first week of July and September to measure yield and improve fruit quality.

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“…Soluble sulfate, chloride and nitrate micronutrient salts represent the main fertilizer sources utilized for leaf spraying in citrus (Quaggio et al, 2010). However, given incidences of leaf "burning" associated with toxic saline symptoms of more concentrated fertilizer solutions (Fernández et al, 2013), the search for new fertilizer sources, such as oxides and carbonates, has been sought by sustainable production systems (Bell and Dell, 2008;Macedo et al, 2017). Efficiency of traditional foliar fertilizers depends on water solubility, while sparingly soluble sources rely upon particle size, in which the smallest particles (0.2 -20 µm) facilitate the release and further absorption of the nutrient by plant leaves (Du et al, 2015), maintaining a constant nutrient supply for long periods reducing the risk of leaf tissue injury immediately after application (Li et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus

Macedo

Júnior

Jacobassi

et al. 2021

Sci. agric. (Piracicaba, Braz.)

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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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Use of sparingly soluble micronutrients sources for citrus production

Cited by 4 publications

References 30 publications

Diagnóstico nutricional de pomares de laranjeiras da Fronteira Oeste do Rio Grande do Sul

Diagnóstico nutricional de pomares de laranjeiras da Fronteira Oeste do Rio Grande do Sul

Effect of potassium, microelements and seaweed extract spraying on yield and fruit quality of Balady mandarin (Citrus reticulate Blanco)

Efficiency of foliar application of sparingly soluble sources of boron and zinc in citrus

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