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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Clima Temperado. Para informações adicionais entre em contato com cpact.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Clima Temperado. |
Data corrente: |
09/03/2021 |
Data da última atualização: |
10/03/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SETE, P. B.; CIOTTA, M. N.; NAVA, G.; STEFANELLO, L. de O.; BRACKMANN, A.; BERGHETTI, M. R. P.; CADONÁ, E. A.; BRUNETTO, G. |
Afiliação: |
PAULA BEATRIZ SETE; MARLISE NARA CIOTTA; GILBERTO NAVA, CPACT; LINCON DE OLIVEIRA STEFANELLO; AURI BRACKMANN; MAGNO ROBERTO PASQUETTI BERGHETTI; ELIANA APARECIDA CADONÁ; GUSTAVO BRUNETTO. |
Título: |
Potassium fertilization effects on quality, economics, and yield in a pear orchard. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Agronomy Journal, v.112, n. 4, p. 3065-3075, 2020. |
DOI: |
https://doi.org/10.1002/agj2.20235 |
Idioma: |
Inglês |
Conteúdo: |
Potassium (K) nutrient existent in the soil does not always supply pear tree (Pyrus communis L.) demand, which makes the use of potassium-based fertilizer necessary. The objective of this study was to evaluate the impact of potassium fertilization on yield and pears quality in order to establish critical K levels in soil and leaves. The treatments consisted of K application rates of control, 40, 80, 120 and 160 kg K2O ha?1 yr?1 during four crops (2013 to 2017). The fruit quantity, mass and yield were evaluated, and leaves were collected for nutrient analysis. Stratified soil samples were collected, prepared and subjected to exchangeable K extraction by Mehlich-1. In the last two crops, peel color, ethylene production, and respiratory rate were also evaluated after 90 days inside a controlled atmosphere storage chamber. After storage, pears were submitted to a shelf life of 7 days to evaluate the epidermis color, ethylene production, respiratory rate, total titratable acidity (TTA), soluble solids (SS), and pulp firmness. Potassium fertilization increased the exchangeable K contents in the soil, but it was not always correlated with an increase of K concentration in the leaves and fruit. The most economical dose was 45.40 kg K2O ha?1 in the 2016/2017 crop season. It was not possible to estimate K critical levels in the soil and leaves. The fruits submitted to higher doses of K showed the lowest values of ethylene production and respiration rate, which resulted in an increase in storage life in cold rooms and on the shelves. MenosPotassium (K) nutrient existent in the soil does not always supply pear tree (Pyrus communis L.) demand, which makes the use of potassium-based fertilizer necessary. The objective of this study was to evaluate the impact of potassium fertilization on yield and pears quality in order to establish critical K levels in soil and leaves. The treatments consisted of K application rates of control, 40, 80, 120 and 160 kg K2O ha?1 yr?1 during four crops (2013 to 2017). The fruit quantity, mass and yield were evaluated, and leaves were collected for nutrient analysis. Stratified soil samples were collected, prepared and subjected to exchangeable K extraction by Mehlich-1. In the last two crops, peel color, ethylene production, and respiratory rate were also evaluated after 90 days inside a controlled atmosphere storage chamber. After storage, pears were submitted to a shelf life of 7 days to evaluate the epidermis color, ethylene production, respiratory rate, total titratable acidity (TTA), soluble solids (SS), and pulp firmness. Potassium fertilization increased the exchangeable K contents in the soil, but it was not always correlated with an increase of K concentration in the leaves and fruit. The most economical dose was 45.40 kg K2O ha?1 in the 2016/2017 crop season. It was not possible to estimate K critical levels in the soil and leaves. The fruits submitted to higher doses of K showed the lowest values of ethylene production and respiration rate, which resulted in an increase ... Mostrar Tudo |
Palavras-Chave: |
Crop nutrit ion; Soi l fert i l i ty. |
Categoria do assunto: |
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Marc: |
LEADER 02268naa a2200241 a 4500 001 2130561 005 2021-03-10 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1002/agj2.20235$2DOI 100 1 $aSETE, P. B. 245 $aPotassium fertilization effects on quality, economics, and yield in a pear orchard.$h[electronic resource] 260 $c2020 520 $aPotassium (K) nutrient existent in the soil does not always supply pear tree (Pyrus communis L.) demand, which makes the use of potassium-based fertilizer necessary. The objective of this study was to evaluate the impact of potassium fertilization on yield and pears quality in order to establish critical K levels in soil and leaves. The treatments consisted of K application rates of control, 40, 80, 120 and 160 kg K2O ha?1 yr?1 during four crops (2013 to 2017). The fruit quantity, mass and yield were evaluated, and leaves were collected for nutrient analysis. Stratified soil samples were collected, prepared and subjected to exchangeable K extraction by Mehlich-1. In the last two crops, peel color, ethylene production, and respiratory rate were also evaluated after 90 days inside a controlled atmosphere storage chamber. After storage, pears were submitted to a shelf life of 7 days to evaluate the epidermis color, ethylene production, respiratory rate, total titratable acidity (TTA), soluble solids (SS), and pulp firmness. Potassium fertilization increased the exchangeable K contents in the soil, but it was not always correlated with an increase of K concentration in the leaves and fruit. The most economical dose was 45.40 kg K2O ha?1 in the 2016/2017 crop season. It was not possible to estimate K critical levels in the soil and leaves. The fruits submitted to higher doses of K showed the lowest values of ethylene production and respiration rate, which resulted in an increase in storage life in cold rooms and on the shelves. 653 $aCrop nutrit ion 653 $aSoi l fert i l i ty 700 1 $aCIOTTA, M. N. 700 1 $aNAVA, G. 700 1 $aSTEFANELLO, L. de O. 700 1 $aBRACKMANN, A. 700 1 $aBERGHETTI, M. R. P. 700 1 $aCADONÁ, E. A. 700 1 $aBRUNETTO, G. 773 $tAgronomy Journal$gv.112, n. 4, p. 3065-3075, 2020.
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
27/05/2005 |
Data da última atualização: |
07/07/2005 |
Autoria: |
LEITE, R. M. V. B. de C. |
Título: |
Variabilidade de Alternaria helianthi e avaliação da resistência de girassol à mancha de Alternaria (06.04.02.334-03). |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
In: SARAIVA, O. F. (Org.). Resultados de pesquisa da Embrapa Soja - 2003: girassol. Londrina: Embrapa Soja, 2004. |
Páginas: |
p. 38-43. |
Série: |
(Embrapa Soja. Documentos, 242). |
Idioma: |
Português |
Conteúdo: |
Avaliação da resistência de girassol à mancha de Alternaria em condições de campo; Avaliação da resistência de girassol à podridão branca, em condições de campo; Avaliação da resistência de genótipos de girassol ao míldio. |
Thesagro: |
Doença de Planta; Fungo; Girassol. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00866naa a2200181 a 4500 001 1468004 005 2005-07-07 008 2004 bl uuuu u00u1 u #d 100 1 $aLEITE, R. M. V. B. de C. 245 $aVariabilidade de Alternaria helianthi e avaliação da resistência de girassol à mancha de Alternaria (06.04.02.334-03). 260 $c2004 300 $ap. 38-43. 490 $a(Embrapa Soja. Documentos, 242). 520 $aAvaliação da resistência de girassol à mancha de Alternaria em condições de campo; Avaliação da resistência de girassol à podridão branca, em condições de campo; Avaliação da resistência de genótipos de girassol ao míldio. 650 $aDoença de Planta 650 $aFungo 650 $aGirassol 773 $tIn: SARAIVA, O. F. (Org.). Resultados de pesquisa da Embrapa Soja - 2003: girassol. Londrina: Embrapa Soja, 2004.
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