Toprak Altı Damla Sulama Yöntemi ile Sulanan Serin ve Sıcak İklim Çimlerinde Sulama Zamanı Planlaması.

The aim of this study is to determine the irrigation scheduling of cool-season and warm-season turfgrass species under sub-drip irrigation method. Field experiments were conducted in the experimental fields of Silivri municipality in Gümüsyaka village located between boundaries of Tekirdag and İstanbul, during the summer of the 2017. In the study, three different irrigation strategies were applied on cool season and warm season turfgrass species. Experimental design was split-plots in randomized blocks design with three replications. In the experimental area, Bermudagrass (Cynodon spp.) was used as a warm season turf type and a four-part mixture was used as cool season turf type (30% Lolium perenne, 25% Festuca rubra rubra, 35% Festuca arundinacea and 10% Poa pratensis). Irrigation water was applied when approximately 30%, 50%, and 70% of readily available water at effective root zone of 30 cm was consumed and completed to the field capacity. Irrigation scheduling was planned according to changes of available soil moisture level in root zone. At the end of the study for cool season turfgrass types; the total amount of irrigation water applied in different irrigation strategies varied between 324,2 mm -- 195,7 mm, seasonal evapotranspiration values varied between 382,7 mm -- 260,2 mm, and daily evapotranspiration values varied between 5,38 mm day-1 -- 3,69 mm day-1. As for warm season turfgrass types; same values varied between 298,6 mm -- 117,1 mm; 357,9 mm -- 180,4 mm; and 5,03 mm day-1 -- 2,53 mm day-1, respectively. In conclusion, the effect of different irrigation levels on two different turfgrasses have been determined to be statistically significant. When factors such as amount of irrigation water applied, cutting frequency and quality under the region's conditions are evaluated together; it is suggested to start irrigation when 50% of the available water in effective root zone is consumed in cool season turfgrass and when 70% is consumed in warm season turfgrass. When suggested aspects are compared, it can be said that warm season turfgrass demands 43% less irrigation water and consumes 52% less water than cool season turfgrass. Blaney-Criddle method was found to be the most suitable estimation method for reference evapotranspiration for cool and warm season turfgrass under the region's conditions and crop coefficient curves regarding these method were generated. [ABSTRACT FROM AUTHOR]