Fertilização com boro e zinco no solo em complementação à aplicação via foliar em laranjeira Pêra

Quaggio, J. A.; Mattos, Dirceu; Cantarella, Heitor; Tank, A. K.

doi:10.1590/s0100-204x2003000500011

Cited by 27 publications

(24 citation statements)

References 7 publications

(5 reference statements)

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“…A concentração de B no solo aumentou de maneira linear com o aumento da dose aplicada do nutriente, nos pomares das duas cultivares (Figura 1a Quaggio et al (2003) demonstraram que a adição de ácido bórico (2,0 g L -1 ) ao solo elevou a concentração de B no solo, com reflexos significativos também no incremento do teor do nutriente nas folhas de laranjeira-Pera.…”

Section: Resultsunclassified

Influência de formas de aplicação de boro na qualidade e no rendimento de maçãs (Malus domestica)

Sá

Ernani

Nava³

et al. 2014

Rev. Bras. Frutic.

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O boro (B) é aplicado na maioria dos pomares brasileiros de maçã, porém sem fundamentação experimental regional. Este trabalho teve por objetivo avaliar o efeito de formas, doses e épocas de aplicação de B no rendimento e na qualidade de maçãs. O experimento foi instalado em São Joaquim-SC, em 2002, com as cultivares Imperial Gala e Fuji Suprema conduzidas em áreas diferentes, cujas avaliações foram realizadas nas safras de 2009/2010 e 2010/2011. Os tratamentos consistiram em um fatorial envolvendo doses de B aplicadas ao solo, a cada dois anos, e épocas de pulverização na planta, feitas anualmente. Utilizou-se de delineamento experimental de blocos ao acaso, com três repetições, cujos tratamentos foram arranjados em parcelas subdividas: na parcela principal, foram alocadas as épocas de aplicação foliar de ácido bórico (sem pulverização, 0,3% pulverizado na fase de botão rosado e 0,6% em pós-colheita) e nas subparcelas, as doses de bórax no solo (0; 2,5 e 5,0 kg ha-1 de B). A aplicação de B no solo foi mais eficiente do que a pulverização foliar para aumentar o teor de B na polpa, na folha e no solo; no entanto, não afetou nenhum dos atributos relacionados com a qualidade dos frutos, nas duas cultivares. A pulverização com B diminuiu o teor de amido e a acidez titulável, e não afetou o teor de sólidos solúveis e a firmeza da polpa dos frutos. A pulverização na floração diminuiu a germinação de grãos de pólen na cultivar Imperial Gala e a frutificação efetiva na cultivar Fuji Suprema. O rendimento de frutos não foi afetado pela adição de B, independentemente da época, da forma de aplicação ou dose, nas duas cultivares. Assim, não há necessidade de aplicar B nessas cultivares em pomares cultivados em solos com altos teores de matéria orgânica, com o objetivo de incrementar a produção e a qualidade dos frutos.

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Section: Resultsunclassified

Influência de formas de aplicação de boro na qualidade e no rendimento de maçãs (Malus domestica)

Sá

Ernani

Nava³

et al. 2014

Rev. Bras. Frutic.

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“…In acidic soil, B in solution occurs predominantly as H 3 BO 3 , a weak acid that has a very low dissociation rate that makes it highly leached in the soil (Tanaka et al, 1993;Silva et al, 1995;Quaggio et al, 2003). Thus, of the total B applied, a part was moved in the form of H 3 BO 3 .…”

Section: Boron Concentration In Relation To Soil Depthmentioning

confidence: 99%

Boron extraction and vertical mobility in Paraná State oxisol, Brazil

Neto

Muniz

Silva

et al. 2009

Rev. Bras. Ciênc. Solo

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The deficiency or excess of micronutrients has been determined by analyses of soil and plant tissue. In Brazil, the lack of studies that would define and standardize extraction and determination methods, as well as lack of correlation and calibration studies, makes it difficult to establish limits of concentration classes for analysis interpretation and fertilizer recommendations for crops. A specific extractor for soil analysis is sometimes chosen due to the ease of use in the laboratory and not in view of its efficiency in determining a bioavailable nutrient. The objectives of this study were to: (a) evaluate B concentrations in the soil as related to the fertilizer rate, soil depth and extractor; (0 a 0,05, 0,05 a 0,10, 0,10 a 0,15, 0,15 a 0,20, 0,20 a 0,30 e 0,30 a 0,40 m

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“…Additionally, the relative proportions of H 3 BO − 4 and H 3 BO 3 in the soil solution increases as the soil pH rises (Evans, 1987), and H 3 BO − 4 is sorbed with much higher intensity than H 3 BO 3 . In soils with a pH below 7.0, however, H 3 BO 3 is the predominant form of B in the soil solution, which is highly susceptible to leaching (Silva et al, 1995;Quaggio et al, 2003). Increases in B sorption up to 33 % following the liming of some soils in São Paulo state, Brazil, were observed by Alleoni and Camargo (2000).…”

Section: Resultsmentioning

confidence: 97%

Boron Leaching Decreases withIncreases on Soil pH

Sá

Ernani

2016

Rev. Bras. Ciênc. Solo

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Management of boron fertilization depends on the magnitude of B leaching in the soil profile, which varies proportionally with the concentration of B in the soil solution, which, in turn, decreases as the soil pH increases due to the higher sorption of B on soil solid surfaces. The objective of this study was to quantify the effect of liming and rates of B applied to the soil on B leaching. The experiment was carried out in the laboratory in 2012, and treatments consisted of a factorial combination of two rates of liming (without and with lime to raise the soil pH to 6.0) and five rates of B (0, 10, 20, 50 and 100 mg kg Boron was manually mixed with the top 0.15 m of the soil. After that, every seven days for 15 weeks, 300 mL of distilled water were added to the top of each column. In the percolated solution, both the volume and concentration of B were measured. Leaching of B decreased with increased soil pH and, averaged across the B rates applied, was 58 % higher from unlimed (pH 4.6) than from limed (pH 6.6) samples as a result of the increase in B sorption with higher soil pH. In spite of its high vertical mobility, the residual effect of B was high in this oxisol, mainly in the limed samples where 80 % of B applied at the two highest rates remained in the soil, even after 15 water percolations.Total recovery of applied B, including leached B plus B extracted from the soil after all percolations, was less than 50 %, showing that not all sorbed B was quantified by the hot water extraction method.

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Fertilização com boro e zinco no solo em complementação à aplicação via foliar em laranjeira Pêra

Cited by 27 publications

References 7 publications

Influência de formas de aplicação de boro na qualidade e no rendimento de maçãs (Malus domestica)

Influência de formas de aplicação de boro na qualidade e no rendimento de maçãs (Malus domestica)

Boron extraction and vertical mobility in Paraná State oxisol, Brazil

Boron Leaching Decreases withIncreases on Soil pH

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