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Scientia Agricola | 2000

Porous ceramic cup extractors to monitor electric conductivity and potassium levels in soil solution

Ênio Farias de França e Silva; Gláucia Regina Anti; Quirino Augusto de Camargo Carmello; Sergio Nascimento Duarte

The objective of this work was to evaluate porous ceramic cups to observe electric conductivity and potassium concentration in soil solution. An area cultivated with tomatoes under fertirrigation with three potassium levels and application frequencies of one and three days, was used. Values for electric conductivity and K concentration were corrected for moisture using saturated pastes as a function of different soil moistures. Values for electric conductivity obtained with porous ceramic cups underestimated by approximately 16% these characteristics measured in the saturation paste extract. The same tendency was observed in the K concentrations, being underestimated by approximately 10%. Coefficients of variation (R2) were greater by 0.7 for the two analyzed variables. Results showed that electric conductivity and K concentration can be analyzed through the solution extractors with an acceptable precision.


2001 Sacramento, CA July 29-August 1,2001 | 2001

CERAMIC CUP EXTRACTORS AND DILUTE SOLUTIONS FOR SOIL SALINITY DETERMINATION

Ênio Farias de França e Silva; Sergio Nascimento Duarte; Rubens Duarte Coelho

The objective of this work was to evaluate the possibility of using porous ceramic cup extractors and the dilute solution technique 1:2 (distilled dry soil:water) to quantify the soil salinity, correlating the electrical conductivity (EC) values obtained by these methods with the standard method (saturation paste extract). An experiment in laboratory was carried out using soil conditioned in pots irrigated with water concentrations of 1.0; 2.5; 4.0 and 5.5 dS.m -1 and leaching fractions of 10% and 30% of evapotranspiration , resulting in different levels of soil salinization. Electrical conductivity was measured in the saturation extract (ECe), in 1:2 solution (EC1:2) and in soil solution collected through porous cups at soil moisture level near to the field capacity of the soil contained in the pots (ECscp). The values of ECscp overestimated 19.35% of the average ECe measured before the moisture correction. After the correction of the different soil moisture levels, the values obtained with the cups extractors presented a close relationship (1:1) with the ECe values, with a r 2 =0.93. EC1:corresponded to 15.48% of ECe, before the moisture correction. However, when the electrical conductivity corrections in function of the moisture levels were accomplished with average values they were 18% higher than ECe values, possibly due to the solubility of calcium carbonate.


Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences | 2011

Produção de rúcula em sistema hidropônico NFT utilizando água salina do Semiárido - PE e rejeito de dessalinizador

Alexsandro Oliveira da Silva; David James Rodrigues da Silva; Tales M. Soares; Ênio Farias de França e Silva; Alexandre Nascimento dos Santos; Mario M. Rolim


Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences | 2012

Eficiência do uso de água e de fertilizantes no manejo de fertirrigação no cultivo do tomateiro sob condições de salinidade do solo

Pedro R. F. Medeiros; Sergio Nascimento Duarte; Ênio Farias de França e Silva


IRRIGA | 2012

CONSUMO HÍDRICO DA RÚCULA EM CULTIVO HIDROPÔNICO NFT UTILIZANDO REJEITOS DE DESSALINIZADOR EM IBIMIRIM-PE

Alexsandro Oliveira da Silva; Ênio Farias de França e Silva; Alexandre Nascimento dos Santos; Antonio Evaldo Klar


Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences | 2012

Alterações físicas e biológicas em solo cultivado com cana-de-açúcar após colheita e aplicação de vinhaça

Thiciano L. Miranda; Elvira M. R. Pedrosa; Ênio Farias de França e Silva; Mario M. Rolim


Revista Engenharia na Agricultura - REVENG | 2013

Produção da cultura da beterraba irrigada com água salina.

Alexsandro Oliveira da Silva; Antonio Evaldo Klar; Ênio Farias de França e Silva


ENGENHARIA NA AGRICULTURA / Engineering in Agriculture | 2012

AVALIAÇÃO DO DESEMPENHO DE MÉTO DOS DE ESTIMATIVA DE EVAPOTRANSPIRAÇÃO POTENCIAL PARA A REGIÃO NORTE DE RECIFE-PE

Alexsandro Oliveira da Silva; Ênio Farias de França e Silva; Geber Balrbosa de Albuquerque Moura; Pabrício Marcos Oliveira Lopes


Water Resources and Irrigation Management | 2013

Eficiência de uso da água em cultivares de beterraba submetidas a diferentes tensões da água no solo

Alexsandro Oliveira da Silva; Ênio Farias de França e Silva; Antonio Evaldo Klar


Revista Brasileira de Ciências Agrárias (Agrária) Brazilian Journal of Agricultural Sciences | 2012

Alterações físicas e biológicas em solo cultivado com cana-de-açúcar após colheita e aplicação de vinhaça - DOI:10.5039/agraria.v7i1a897

Thiciano L. Miranda; Elvira M. R. Pedrosa; Ênio Farias de França e Silva; Mario M. Rolim

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Mario M. Rolim

Universidade Federal Rural de Pernambuco

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Alexandre Nascimento dos Santos

Universidade Federal Rural de Pernambuco

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Elvira M. R. Pedrosa

Universidade Federal Rural de Pernambuco

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David James Rodrigues da Silva

Universidade Federal Rural de Pernambuco

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Pabrício Marcos Oliveira Lopes

Universidade Federal Rural de Pernambuco

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