29th International Horticultural Congress on Horticulture - Sustaining Lives, Livelihoods and Landscapes (IHC) / International Symposium on Innovation and New Technologies in Protected Cropping, Brisbane, Avustralya, 17 - 22 Ağustos 2014, cilt.1107, ss.215-220
A study was carried out to determine the effects of mycorrhiza application and irrigation programs on soilless grown tomato plants under polyethylene covered unheated greenhouse conditions. Three irrigation programs (full irrigation, deficit 1 and deficit 2) based on integrated indoor solar radiation (R5) triggering thresholds (1, 3 and 6 MJ m-2) in the case of mycorrhizal inoculation (VAM) or not have been tested. Applied and discharged nutrient solution, evapotranspiration, total and marketable yield were measured and water use efficiency was calculated. According to the overall results of two crop cycles, eggplant yield, evapotranspiration and water use efficiency increased with mycorrhiza inoculation and decreased with deficit irrigation. Yield increases were 24% in fall and 45% in spring growing seasons obtained in mycorrhiza inoculated plants. Water use efficiency (WUE) and irrigation water use efficiency (IWUE) values were significantly influenced by the growing seasons. The average WUE of treatments in both growing seasons were 1.6 times higher compared to IWUE. The maximum IWUE was observed in deficit 1, and the minimum IWUE was in full irrigation treatment. Results showed that irrigation of eggplants could be based on the accumulated solar radiation level of 3 MJ m-2 under the deficit conditions with a minimum yield loss in particularly with mycorrhiza inoculation.