Articles
Non-water-stressed baseline determination for a ‘Cabernet Sauvignon’ grapevine growing under Mediterranean conditions
Article number
1409_28
Pages
207 – 214
Language
English
Abstract
Canopy temperature measurements have been widely used along with the monitoring of micrometeorological variables to calculate thermal indices such as the crop water stress index (CWSI), which can be used to estimate vine (Vitis vinifera) water status.
For this objective, a study was carried out during two growing seasons in a drip-irrigated vineyard (Pencahue Valley, Maule Region, Chile) to develop regression models based on CWSI to compute midday stem water potential (MSWP). In this study, CWSI was calculated using canopy temperature (Tc) obtained from a thermal infrared (TIR) sensor and meteorological data collected from an automatic weather station.
Twet values were obtained using the lowest Tc for each season, and Tdry was calculated using the energy balance of the leaf.
The MSWP and Tc were measured between 12:00 and 14:00 pm Results indicated a significant regression relationship between MSWP and CWSI, with coefficients of determination (R2) of 0.68 and 0.71 being obtained for the first and second seasons, respectively.
This study suggested that TIR sensors could be a tool for monitoring vine water status and, thus, vineyard irrigation management.
For this objective, a study was carried out during two growing seasons in a drip-irrigated vineyard (Pencahue Valley, Maule Region, Chile) to develop regression models based on CWSI to compute midday stem water potential (MSWP). In this study, CWSI was calculated using canopy temperature (Tc) obtained from a thermal infrared (TIR) sensor and meteorological data collected from an automatic weather station.
Twet values were obtained using the lowest Tc for each season, and Tdry was calculated using the energy balance of the leaf.
The MSWP and Tc were measured between 12:00 and 14:00 pm Results indicated a significant regression relationship between MSWP and CWSI, with coefficients of determination (R2) of 0.68 and 0.71 being obtained for the first and second seasons, respectively.
This study suggested that TIR sensors could be a tool for monitoring vine water status and, thus, vineyard irrigation management.
Authors
K. Gutter, S. Ortega-Farías, F. Fuentes-Peñailillo, R. Vega-Ibáñez
Keywords
plant water status, thermal index, canopy temperature, crop water stress index, remote sensing
Online Articles (64)