Artículo
Long-Term Assessment of Reference Baselines for the Determination of the Crop Water Stress Index in Maize under Mediterranean Conditions
Autor/es | Prior Fernández, Alejandro Manuel
Apolo Apolo, Orly Enrique Castro Valdecantos, Pedro Pérez Ruiz, Manuel Egea Cegarra, Gregorio |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos |
Fecha de publicación | 2021 |
Fecha de depósito | 2022-07-27 |
Publicado en |
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Resumen | Canopy temperature has been proposed as a relevant variable for crop water stress moni toring. Since crop temperature is highly influenced by the prevailing climatic conditions, it is usually
normalized with indices such ... Canopy temperature has been proposed as a relevant variable for crop water stress moni toring. Since crop temperature is highly influenced by the prevailing climatic conditions, it is usually normalized with indices such as the crop water stress index (CWSI). The index requires the use of two baselines that relate canopy temperature under maximum stress and non-water stress conditions with vapor pressure deficit (VPD). These reference baselines are specific to each crop and climatic region. In maize, they have been extensively studied for certain climatic regions but very little is known on their suitability to be used under Mediterranean-type conditions nor their temporal stability, both diurnally and between seasons. Thus, the objective of this work was to determine the reference baselines for maize grown under Mediterranean conditions, as well as its diurnal and long-term stability. An experiment was conducted for 3 years in a maize breeding field, under well-watered and water-stressed irrigation treatments. The determined reference baselines for computing CWSI in maize have shown to be stable in the long term but markedly influenced by the meteorological variations between 10–17 h UTC (Coordinated Universal Time). These results indicate that several reference baselines should be used for CWSI computing throughout the abovementioned time inter val. The CWSI values calculated for well-watered and water-stressed maize breeding plots using the reference baselines derived in this study were successfully correlated with other physiological indicators of plant water stress. |
Cita | Prior Fernández, A.M., Apolo Apolo, O.E., Castro Valdecantos, P., Pérez Ruiz, M. y Egea Cegarra, G. (2021). Long-Term Assessment of Reference Baselines for the Determination of the Crop Water Stress Index in Maize under Mediterranean Conditions. Water, 2022 (13) (2022 (21)), 1 p.-18 p.. |
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