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| Sá,Alessandra Aparecida de; Ernani,Paulo Roberto. |
| ABSTRACT 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-1, as boric acid). A Typic Rhodudalf was used, containing 790 g kg-1 clay and 23 g kg-1 organic matter; the pH(H2O) was 4.6.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acid soils; Liming; Boron fertilization; Percolation; Soil B. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100401 |
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| Nava,Gilberto; Ernani,Paulo Roberto; Sá,Alessandra Aparecida de; Pereira,Adilson José. |
| Gypsum does not affect the soil negative charges and maintains sulfate in the soil solution, making it one of the cheapest products to increase Ca activity in soil solution, especially in the deeper soil layers. Higher Ca levels in the soil solution can increase the uptake of this nutrient by apple trees, reducing the risk of physiological disorders caused by Ca deficiency. This study assessed the effect of long-term gypsum application on some soil properties and on the chemical composition of leaves and fruits of an apple cultivar susceptible to fruit disorders associated with low Ca. The experiment was conducted in São Joaquim, in the South of Brazil, from 2001 to 2009. Gypsum rates of 0, 1.0, 2.0 and 3.0 t ha-1 were annually broadcast over the soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Downward movement; Cations; Nutritional status; Calcium. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100022 |
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| Sá,Alessandra Aparecida de; Ernani,Paulo Roberto; Nava,Gilberto; Amarante,Cassandro Vidal Talamini do; Pereira,Adilson José. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubação foliar; Composição de frutos; Maturação de fruto; Cultivares de macieira. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452014000200027 |
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