Electrical conductivity of soil irrigated with swine wastewater estimated by time-domain reflectometry¹

Revista Brasileira de Ciência do Solo

Rosimaldo Soncela¹  Silvio Cesar Sampaio²  Marcio Antonio Vilas Boas²  Maria Hermínia Ferreira Tavares²  Claudinei Fonseca Souza¹  Adriana Smanhotto Soncela¹ 

[1] ,UNIOESTE

关键词: TDR;    soil salinity;    soil water content;    water reuse;    TDR;    salinidade do solo;    umidade do solo;    reúso da água;   

DOI  :  10.1590/S0100-06832011000400023

来源: SciELO

【 摘 要 】

Wastewater application to soil is an alternative for fertilization and water reuse. However, particular care must be taken with this practice, since successive wastewater applications can cause soil salinization. Time-domain reflectometry (TDR) allows for the simultaneous and continuous monitoring of both soil water content and apparent electrical conductivity and thus for the indirect measurement of the electrical conductivity of the soil solution. This study aimed to evaluate the suitability of TDR for the indirect determination of the electrical conductivity (ECse) of the saturated soil extract by using an empirical equation for the apparatus TDR Trase 6050X1. Disturbed soil samples saturated with swine wastewater were used, at soil proportions of 0, 0.45, 0.90, 1.80, 2.70, and 3.60 m³ m-3. The probes were equipped with three handmade 0.20 cm long rods. The fit of the empirical model that associated the TDR measured values of electrical conductivity (EC TDR) to ECse was excellent, indicating this approach as suitable for the determination of electrical conductivity of the soil solution.

【 授权许可】

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