Soil nitrogen application in the spring did not increase apple yield

Ernani, Paulo Roberto; Dias, Jaques

doi:10.1590/s0103-84781999000400013

Cited by 19 publications

(17 citation statements)

References 10 publications

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“…The experimental design was randomized blocks with treatments distributed in a factorial arrangement (4 x 2) referring to: i) apple cultivars (Eva and Princesa); and ii) nitrogen doses (40, 80, 120 and 160 kg of N ha -1 ) defined according to Ernani & Dias (1999), with four replications and three plants in each parcel.…”

Section: Methodsmentioning

confidence: 99%

Fruit quality of ‘Eva’ e ‘Princesa’ apples grown under nitrogen fertigation in semiarid climate

Miranda

Cavalcante

Oliveira

et al. 2015

Rev. bras. eng. agríc. ambient.

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The production of high quality fruits is a necessary factor for the adaptation and production of plant species with economic viability. Thus, an experiment was conducted from July 2012 to January 2013 to evaluate the fruit quality of the ‘Eva’ and ‘Princesa’ apple cultivars as a function of nitrogen fertilization in Petrolina, PE, Brazil. The experimental design consisted of randomized blocks, with treatments distributed in a factorial arrangement 2 x 4, corresponding to apple cultivars (Eva and Princesa) and nitrogen doses (40; 80; 120 and 160 kg of N ha-1), with four replications and three plants in each plot. The fruit characteristics, such as fruit mass, skin color (luminosity, chromaticity, and colour angle), size (width and length), pulp firmness, titratable acidity (TA), soluble solids (SS) and the SS/TA ratio, were recorded. Nitrogen doses do not affect fruit quality of studied apple cultivars. The fruit quality attributes are different between apple cultivars: fruit firmness, SS/TA ratio, fruit mass and fruit diameter are superior for Princesa cultivar, while the fruit length for Eva cultivar is superior.

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Section: Methodsmentioning

confidence: 99%

Fruit quality of ‘Eva’ e ‘Princesa’ apples grown under nitrogen fertigation in semiarid climate

Miranda

Cavalcante

Oliveira

et al. 2015

Rev. bras. eng. agríc. ambient.

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“…Em solos profundos da região Sul do Brasil, a adição de N não tem aumentado o rendimento de maçãs (BASSO;SUZUKI, 1992;DIAS, 1999;ERNANI et al, 2000), diferentemente do que ocorre em solos pouco profundos e pedregosos (NAVA et al, 2008;DECHEN, 2009). Alta disponibilidade de N nos solos pode afetar tanto a produtividade quanto a qualidade dos frutos por influenciar positivamente o tamanho (JOHNSON, 1996;WARGO et al, 2003), negativamente a cor vermelha e a firmeza da polpa (JOHNSON, 1996;DRAKE et al, 2002;WARGO et al, 2003), e por favorecer o desenvolvimento de distúrbios fisioló-gicos (RAESE; DRAKE, 1997).…”

Section: Introductionunclassified

Qualidade de maçãs 'Fuji' influenciada pela adubação nitrogenada e potássica em dois tipos de solo

Souza¹,

Argenta

Nava³

et al. 2013

Rev. Bras. Frutic.

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, CASSANDRO VIDAL TALAMINI DO AMARANTE 5 RESUMO -Macieiras 'Fuji' crescidas sobre Cambissolo e Neossolo foram tratadas com doses de N e K 2 O (0; 50; 100 e 200 kg ha -1 de ambos) por nove anos. As alterações da maturação e qualidade das maçãs, na colheita e após a armazenagem, decorrentes das aplicações de N e K 2 O, não foram iguais para os dois solos. Altas doses de N aumentaram o teor de N e diminuíram a cor vermelha e o teor de amido nos frutos, independentemente do solo e da dose de K 2 O. A massa dos frutos aumentou, e a firmeza da polpa diminuiu em resposta às altas doses de N aplicadas no Neossolo, independentemente da dose de K 2 O, o que não ocorreu de forma consistente no Cambissolo. A acidez titulável (AT) reduziu por altas doses de N em ambos os solos, quando se aplicaram baixas doses de K 2 O. Os teores de K, amido, AT, massa e coloração avermelhada aumentaram, enquanto a firmeza diminuiu consistentemente e independentemente da dose de N, em resposta a altas doses de K 2 O no Cambissolo, mas não no Neossolo. Os efeitos de doses de N e K 2 O sobre a firmeza da polpa e AT foram mais evidentes após a armazenagem do que na colheita. Termos de indexação: Malus domestica, nutrição, nitrogênio, potássio, maturação de fruto, armazenagem. QUALITY OF 'FUJI' APPLES AFFECTED BY NITROGEN AND POTASSIUM FERTILIZATION IN TWO SOIL TYPESABSTRACT -Fuji' apple trees grown on Inceptisol and Entisol were annually fertilized with doses of N and K 2 O (0, 50, 100, and 200 kg ha -1 , for both) along nine growing seasons. Changes of fruit maturity and quality at harvest and after cold storage in response to N and K 2 O fertilization were not the same for the two soil types. The increment of N rate applied increased the N content and reduced the starch content and peel red color of the fruit in both soils, regardless of K 2 O rate. On the Entisol, the increment of N rate increased the fresh mass and reduced the flesh firmness of the fruit, regardless of K 2 O rate, while in the Inceptisol this response was not consistent. Fruit titratable acidity (TA) reduced with the increment of N rate in both soils, especially at low rates of K 2 O. For the orchard on Inceptisol, the K and starch contents, TA, fresh mass, and peel red color increased, while the flesh firmness reduced consistently and independently of N rate, with the increment of K 2 O rate, but not for the orchard on the Entisol. The effects of N and K 2 O rates on flesh firmness and TA of the fruit were more evident after cold storage than at harvest.

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“…It is important to infer that the lack of N fertilizing effect on fruit yield could be associated with some characteristics such as low N requirement of apple tree (Ernani and Dias, 1999), good conditions for N release from soil organic matter, and poor conditions for N leaching.…”

Section: Resultsmentioning

confidence: 99%