Calibração de sondas capacitivas, funções físico-hídricas e variação do armazenamento de água em um argissolo cultivado com palma forrageira 1/Field calibration of capacitive probes, physical-hydric propriety and variation of water storage in soil cultivated with cactus forage

• Published in: Revista Ceres Vol. 62; no. 1; p. 20
• Main Authors: Primo, Jorge Torres de Araújo, da Silva, Thieres George Freire, e Silva, Sérvulo Mercier Siqueira, de Moura, Magna Soelma Beserra, de Souza, Luciana Sandra Bastos
• Format: Journal Article
• Language: Portuguese
• Published: Vicosa Universidade Federal de Viçosa-UFV, Revista Ceres 01.01.2015
• ISSN: 0034-737X

The objective of this work was to carry out calibration of three capacitive probes, to use them in the definition of physical-hydric functions and in spatial and temporal analysis of the soil water content (e) and water storage in an Udult soil cultivated with three palm forage clones, in Brazilian Semi-arid. The study was carried out in an experimental area located in Serra Talhada, State of Pernambuco. Therefore, calibration of the three capacitive probes was carried out using soil density and gravimetric moisture data and relative frequencies in five conditions of soil moisture. It was applied the instantaneous profile method for determination of water flow in the soil and matrix potential of the water in the soil. After that, the space-temporal variation of e and water storage in the soil were analyzed. Measures of relative frequency of the capacitive probes showed high relationship with the e data.