Dual Crop Coefficient Approach in Vitis vinifera L. cv. Loureiro

Vineyard irrigation management in temperate zones requires knowledge of the crop water requirements, especially context climate change. The main objective this work was to estimate evapotranspiration (ETc) Vitis vinifera cv. Loureiro for local conditions, applying dual coefficient approach. study carried out a vineyard during two growing seasons (2019–2020). Three treatments, full (FI), deficit (DI), and rainfed (R), were considered. ETc estimated using SIMDualKc model, which performs soil balance with Kc This performed by calculating basal coefficients grapevine (Kcb crop) active ground cover gcover), represent transpiration component evaporation (Ke). model calibrated validated comparing simulated content (SWC) data measured frequency domain reflectometry (FDR). A suitable adjustment between observed SWC obtained 2019 R strategy when calibrated. As vine crop, best fit Kcb ini = 0.33, mid 0.684, end 0.54. In sense, schedule must adjust these conditions achieve economically environmentally sustainable production.