Abstract
Vineyard irrigation management in temperate zones requires knowledge of the crop water requirements, especially in the context of climate change. The main objective of this work was to estimate the crop evapotranspiration (ETc) of Vitis vinifera cv. Loureiro for local conditions, applying the dual crop coefficient approach. The study was carried out in a vineyard during two growing seasons (2019–2020). Three irrigation treatments, full irrigation (FI), deficit irrigation (DI), and rainfed (R), were considered. The ETc was estimated using the SIMDualKc model, which performs the soil water balance with the dual Kc approach. This balance was performed by calculating the basal coefficients for the grapevine (Kcb crop) and the active soil ground cover (Kcb gcover), which represent the transpiration component of ETc and the soil evaporation coefficient (Ke). The model was calibrated and validated by comparing the simulated soil water content (SWC) with the soil water content data measured with frequency domain reflectometry (FDR). A suitable adjustment between the simulated and observed SWC was obtained for the 2019 R strategy when the model was calibrated. As for the vine crop, the best fit was obtained for Kcb full ini = 0.33, Kcb full mid = 0.684, and Kcb full end = 0.54. In this sense, the irrigation schedule must adjust these coefficients to local conditions to achieve economically and environmentally sustainable production.
Highlights
The sustainability of wine production is a global strategy that includes all stages of the wine production cycle
The present study aims to provide information on evapotranspiration and crop coefficients for Vitis vinifera cv
Considering the specific parameters of the study field, the calibration and validation of the SIMDualKc model were successfully performed for Vitis vinifera cv
Summary
The sustainability of wine production is a global strategy that includes all stages of the wine production cycle. In achieving sustainable wine production, the environmental aspects, such as efficient water use, should be considered [1]. Water is a factor that significantly influences crop yields [2], and it must be applied sustainably and efficiently [3]. This application must be efficient because, according to predictions, global water extraction will increase by 55% between 2000 and 2050 in a similar scenario to the current one [4]. To implement a sustainable strategy, it is necessary to expand the knowledge on crop evapotranspiration to support appropriate irrigation scheduling and management [5].
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