Using the dual-K-c approach to model evapotranspiration of Albarino vineyards (Vitis vinifera L. cv. Albarino) with consideration of active ground cover

作者：Fandino M; Cancela J J^*; Rey B J; Martinez E M; Rosa R G; Pereira L S

来源：Agricultural Water Management, 2012, 112: 75-87.

DOI：10.1016/j.agwat.2012.06.008

• Soil evaporation
• Vine plants transpiration
• Ground cover transpiration
• Drip irrigation
• Semi-trellised vineyards

This research aims at testing the dual crop coefficient approach to model the evapotranspiration of the traditional Galician %26quot;semi-trellised%26quot; vineyard of Vitis vinifera cv. Albarino with active ground cover. A separate calculation of soil evaporation, transpiration of the vine crop and transpiration of the active ground cover was conducted. Three irrigation treatments - rain-fed, surface and subsurface drip irrigation - were conducted during three crop seasons (2008-2010). The SIMDualKc model, that performs the soil water balance with the dual K-c approach, was applied for estimating crop evapotranspiration (ETc) by calculating a basal crop coefficient for the vine crop (K-cb (full)), another for the active ground cover (K-cb (cover)), which represent the transpiration component of ETc, and a soil evaporation coefficient (K-e). The model was calibrated and validated by comparing model simulated with TDR observed soil water content data. A good fit was obtained showing that modeling was accurate when using the observed fraction of active ground cover, its density and its height, and calculating K-cb (cover) with field measured data, thus allowing to assess the active ground cover transpiration. As for the vine crop, the best fit was obtained for K-cb (full) (ini) = 0.30, K-cb full (mid) = 1.15 and K-cb (full) (end) = 0.90.

• 出版日期2012-9