Çetin, ÖnerYıldırım, MehmetAkıncı, CumaYarosh, Anna2023-07-062023-07-062022Çetin, Ö., Yıldırım, M., Akıncı, C. ve Yarosh, A. (2022). Critical threshold temperatures and rainfall in declining grain yield of durum wheat (Triticum durum Desf.) during crop development stages. Romanian Agricultural Research, 39, 1-11.1222-4227https://www.incda-fundulea.ro/rar/nr39/rar39.24.pdfhttps://hdl.handle.net/11468/12195The effects of maximum temperature, rainfall and growing degree day on grain yield of durum wheat (Triticum durum Desf.) were studied during the period of available years (2005-2017) in the study sites. A polynomial equation was described the relationship between grain yield, maximum temperature and rainfall for four growing stages of winter wheat. The nonlinear relationships were used from time-series variations in temperatures, rainfall and yields. The maximum positive effects of rainfall (R2 =0.72*) on grain yield was in the mid-season stage (heading, anthesis and grain filling) of the crop. However, there was a negative effect of temperature more than 30°C on grain yield. The highest negative effects (R2 =0.31 through 0.86*) of maximum temperatures were in the crop development stages (vernalization and tillering). The yield might decrease about 2.5% for every 1°C increase in the growth period based on the daily mean temperature of 12.4°C for all the study locations. The critical maximum temperatures on threshold values declining yield and positive effects of rainfall on grain yield varied according to the altitudes and longitudeseninfo:eu-repo/semantics/closedAccessClimate changeCritical maximum temperatureCrop development stageDurum wheat (Triticum durum Desf.)Growing degree dayArticle39111WOS:000797195000017ScopusIdYokQ4Q4