Spatial and temporal characterization of water and solute distribution patterns

Autor(es)

Souza, Claudinei Fonseca ; Folegatti, Marcos Vinicius

• Tipo de documento: Artigo Científico
• Fonte: CIENTIA AGRICOL; v. 67, n. 1, p. 7-pg., 2010-01-01.

Resumo

The use of drip irrigation and marginal water is growing rapidly in some areas, highlighting the need to develop sound fertigation practices that combine environmental and crop production concerns. In this study the spatial and temporal water and solute distribution patterns are characterized to underpin fertirrigation design and management systems. Time domain reflectometry (TDR) probes were used to monitor the distributions of potassium nitrate (KNO3) and water from drippers discharging at a constant flow rate of 4 L h(-1) in soil-filled containers. In the interactions between the different profiles, a gradient distribution of the solution in the soil was observed, with greater storage of solution close to the dripper, which decreased gradually as it approached the wetting front. To reduce leaching of fertigated ions, the frequent application of small amounts of solution during irrigation is recommended. (AU)

• Processo FAPESP: 03/00067-6 - Estudo da dinamica da agua e do soluto no solo para o dimensionamento e manejo da irrigacao por gotejamento utilizando a tecnica da reflectometria no dominio do tempo (tdr).
• Beneficiário: Marcos Vinícius Folegatti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 05/00906-3 - Estudo da dinâmica da solução no solo para o dimensionamento e manejo da irrigação por gotejamento utilizando a técnica da reflectometria no domínio do tempo (TDR)
• Beneficiário: Claudinei Fonseca Souza
• Modalidade de apoio: Auxílio à Pesquisa - Regular