EVAPOTRANSPIRATION OF TOMATO PLANTS GROWN IN DIFFERENT SOILLESS CULTURE SYSTEMS

Authors:	I.H. Tüzel, M.K. Meriç
Keywords:	Greenhouse, tomato, soilles culture, evapotranspiration
Abstract: This study aimed at measuring evapotranspiration of greenhouse tomato plants grown in Nutrient Film Technique (NFT), open and closed substrate culture during autumn and spring seasons of 1998-1999. In NFT, recirculation of the solution was provided intermittently (45 min on and 15 min off) and continously. In substrate culture, four different substrates [perlite, tuff, perlite + peat (4:1, v/v), tuff + peat (4:1, v/v)] were tested in autumn and spring seasons under irrigation schedule based on integrated solar radiation. Cultivars Gökçe F₁ and FA 361 F₁ were used in autumn and spring seasons, respectively. The results showed that evapotranspiration of tomato plants varied according to the treatments and growing season. The evapotranspiration in the season ranged between 204.4 and 296.6 mm in autumn and 391.5 and 514.1 mm in spring. The highest daily evapotranspiration values were 4.4 mm in autumn and 8.2 mm in spring in NFT. Regarding the substrate culture, the highest evapotranspiration was obtained from perlite + peat (4:1, v/v). Besides, relationships between actual ET and reference ET are presented.
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