Evapotranspiration in the Greenhouse under Different Shading Screen Materials

Abstract

Evapotranspiration, water vapour pressure difference, air and canopy temperature in a greenhouse were measured under shading screen materials with different shade factors and air change rate. The highest average evapotranspiration occurred under the screen material LS14, while the average evapotranspiration under the shading screen materials DGT4b and LS16 was equal. The highest water vapour pressure difference was found under DGT4b and the lowest under LS16. Only a small difference in air temperature was found under the screen materials.