Reduction of Evapotranspiration in Microenvironment Conditions of Table Grape Vineyards Protected by Different Types of Plastic Covers

Saving water is a major challenge to increase environmental sustainability, particularly in semi-arid regions where most table grapes are produced. Water use driven by atmospheric demand, which combines effects of solar radiation (prominent factor), wind, air temperature and humidity. Covering with transparent plastics spread many regions. Covers lower incoming wind speed, changing This study assessed the two plastic covers on reference evapotranspiration (ET0) comparison open field. For years, vineyards (cv. Victoria) trained overhead trellis systems (tendone) were covered polyethylene sheets: an agrotextile fabric (C), commercial film (S). The sheet spectrophotometric properties analyzed radiometric coefficients calculated. Micrometeorological data recorded nearby uncovered one. ET0 was calculated for June July using simplified Penman–Monteith equation. coefficient transmissivity total photosynthetic radiation, proxy net 73% cover C 83% S. On average, decreased 35% under 31% Hence, addition providing protection from external agents, represent valid tool saving grape viticulture; nevertheless, their should be considered optimized better achieve this goal.