The Effects of Different Irrigation Levels and Nitrogen Doses on Growth, Quality and Physiological Parameters of Warm-season Turfgrasses

Authors : Fikret YÖNTER, Sinem ZERE TAŞKIN, Müge KESİCİ, Burak Nazmi CANDOĞAN, Asuman CANSEV, Ugur BİLGİLİ

Pages : 272-286

Doi:10.15832/ankutbd.1029995

View : 20 | Download : 8

Publication Date : 2023-01-31

Article Type : Research Paper

Abstract :This research was conducted to determine to effects of different irrigation levels and nitrogen doses insert ignore into journalissuearticles values(ND); on the various warm-season turfgrasses at the Agricultural Training and Research Centre of the Bursa Uludag University Faculty of Agriculture for two years in a row. The experimental design was the randomized blocks in a split-split plot design with three replications. The main plot was irrigation levels insert ignore into journalissuearticles values(I1=25%, I2=50%, I3=75%, and I4=100% of pan evaporation);, subplots were turfgrass species [hybrid Bermudagrass insert ignore into journalissuearticles values(Cynodon transvaalensis x Cynodon dactylon); cv. Tifdwarf, seashore paspalum insert ignore into journalissuearticles values(Paspalum vaginatum Sw.); cv. Seaspray, zoysiagrass insert ignore into journalissuearticles values(Zoysia japonica Steud.); cv. Zenit], and sub subplots were ND’s insert ignore into journalissuearticles values(monthly 0.0, 1.25, 2.5, and 5.0 g N m-²);. Visual turfgrass color and quality, clipping yield, leaf relative water content insert ignore into journalissuearticles values(RWC);, loss of turgidity insert ignore into journalissuearticles values(LT);, chlorophyll content insert ignore into journalissuearticles values(CC);, and electrolyte leakage were measured. According to the results, significant differences were determined among irrigation levels, turfgrass species, and ND’s for color, quality, clipping yield and physiological parameters. Turfgrass visual color, quality and clipping yield were shown to decrease significantly with decreases in irrigation water and N fertilizer. The study findings demonstrated that under a non-limiting water supply, irrigation could be decreased by adjusting N fertilizer rates with I3N3 treatments can maintain acceptable turfgrass visual color and quality under Mediterranean climatic conditions. In addition, at 25% insert ignore into journalissuearticles values(I1); deficit irrigation level, leaf RWC, CC decreased significantly, while an increase was determined in LT. This research indicated that under 75% insert ignore into journalissuearticles values(I3); deficit irrigation and N3 ND, acceptable quality can be maintained with ‘seaspray’ seashore paspalum under Mediterranean climate performed.
Keywords : deficit irrigation, nitrogen fertilization, turf color, turf physiology