The most important observations indicate that mineral nutrient deficiencies, mainly of Moura et al. Soil data, as shown by chemical analyses, were the following: 1- pH(CaCl2): 5.2.
Os objetivos deste estudo foram: (a) investigar os efeitos do pH na adsorção de B em amostras superficiais e subsuperficiais de um Latossolo Vermelho Acriférrico (LVwf) e de um Latossolo Amarelo Ácrico (LAw) – ambos com balanço positivo de cargas no horizonte Bw - e de um Nitossolo Vermelho eutroférrico (NVef); (b) avaliar a adequação do modelo de Langmuir em simular os resultados experimentais de adsorção; e (c) correlacionar os atributos químicos, físicos e mineralógicos dos solos com os valores de adsorção máxima (Adsmáx) e do coeficiente de afinidade (KL), derivados das isotermas. Root morphology and mycorrhiza can affect the B uptake efficiency of trees. © 2008-2020 ResearchGate GmbH.

O delineamento experimental a ser adotado será o inteiramente casualizado em esquema fatorial 2 x 10 representado pela combinação duas condições de UR (35 e 70%) e dez concentrações de Se (0; 2; 4; 6; 8; 16; 32; 64; 96; 128 µmol L-1) fornecidos na forma de selenato ou selenito. Because the level estimated via the graphical method and by the Mistcherlich equation is similar with regard to the soil boron, 0.48 mg kg-1 can be considered as the critical boron level in soil. Boron concentration in leaf tissue of coconut palm trees determined after application of different boron fertilizer dosages to the soil.

Of deficiencies of the known essential micronutrients, boron deficiency in plants is most widespread. It was documented that the critical limit of B on maize was below 95 ppm [148]. Boron, one of the micronutrients frequently found in low levels in tropical soils affects nutrition and productivity of coconut palm trees essentially cultivated in tropical climates. Considering the evaluated nutrients and the shown leaves, it is possible affirm that the plants were nutritiously were balanced.

Tec & Doc, Paris, p.447-57.

The Cl concentrations had increased with the rise in the N and K doses.

(2001). Z. Moura1, R.M. What to look for in a good organic fertilizer for coconut trees? As classes de menor produtividade apresentaram índices DRIS de K e de B mais negativos que a classe de maior produtividade, havendo, também, um aparente desequilíbrio nutricional entre Ca e Mg. Boron is one of the seven essential micronutrients required for the normal growth of most plants. Revista Brasileira de Ciencias do solo. It can be caused, however, by the use of composted sewage sludge as fertilizer.

The experimental, An experiment was conducted to standardize the critical boron level in soil and leaf samples of coconut palms grown in a typical Entisol of the Onattukara region of Kerala, India. Teor foliar de boro em função da aplicação de bórax na axila foliar de coqueiro-anão verde no Norte Fluminense. Analysis of leaf samples harvested in April of 2006 was as described by Rognon (1984). * Corresponding author: rmprado@fcav, Boron, one of the micronutrients frequently found in low levels in tropical soils affects nutrition and productivity of, coconut palm trees essentially cultivated in tropical climates. 1997.

(1995) and Communar and Keren (2006) also point, of soil around each plant) one in January.

Communar, G., Keren, R. 2006.

When the plants were with 4, 4.5 and 5 years had been made three foliar material collections in two plants for parcel in 9 and 14 number leaves. [ Links ], Silva, N.M., Carvalho, L.H., Kondo, J.I., Bataglia, O.C., Abreu, C.A. Comportamento produtivo do coqueiro anão-verde irrigado na região litorânea do Ceará.

EDUFU, Uberlándia, p. 91-108. (2005) for soils with boron levels lower than 0,2 mg dm3־ when the extractor is hot water. Chronic B deficiencies, caused by soil drying and/or high soil pH affect multiple leaves and ultimately, productivity.

An understanding of the role of major, secondary and micronutrients and their interactions is discussed in relation to the yielding ability of palms. Sua deficiência implica o aparecimento de muitas patologias como cardiopatias e câ, Evaluate the application of different biofertilizers and biostimulants as an alternative to food production in tropical conditions, The aim of this work was to verify if boron redistribution occurs among the coconut palm (Cocos nucifera) fronds, when boric acid is applied on frond axils or on soil.
The primary symptoms of B deficiency in coconut trees are leaflet tip truncation, leaf crumpling or distortion, and failure of the spear leaf to open normally. Efeito da omissao de macronutrientes e boro no crescimento, nos sintomas de deficiencias nutricionais e na composição mineral de plantas de camucamuzeiro. Recomendações de adubação e calagem para o Estado de Sao Paulo. Application of boron to tomato was found to be significant on most of the parameters observed as reported by many researchers ( ) were applied.The result shows that the boron nutrition positively influences the oil content in seeds of oilseed rape (Brassica napusL.). 25, 371־ 374.

[ Links ], Soares, M.R., Casagrande, J.C., Alleoni, L.R.F.

70, 882-892. The trees growing in a red-yellow Latosol (162 g kg-1 of clay) were artificially irrigated.

Revista Brasileira Fruticultura. Instituto Agronômico.