Empirical Models Likely to Be Used to Estimate the Evapotranspiration of Oil Rose (Rosa damascena Mill.)

Abstract

This study was carried out to determine the most suitable evapotranspiration estimate method of oil rose (Rosa damascena Mill.) at the Agricultural Research and Application Center at Süleyman Demirel University in 2010 and 2011. Irrigation was performed every 10 days, and irrigation water as much as 1.2 times of evaporation measured from the Class A Pan in the ten-day period was applied. Evapotranspiration was measured for ten-day periods through controlling the decrease in the soil moisture. The measured evapotranspirations were compared with Penman-Monteith, Original Penman, FAO-modified Penman, Priestly-Taylor, FAO-modified Radiation, FAO-modified Blaney-Criddle, SCS Blaney-Criddle, Hargreaves, FAO-modified Pan Evaporation, and Net Radiation methods out of the evapotranspiration estimation methods. The correlation coefficient (r), root mean square error (RMSE) and seasonal average crop coefficient (Kc) of the correlation between the measured evapotranspiration and estimated evapotranspiration values were taken into consideration in the comparison. As a result of the research, the closest evapotranspiration estimation for the experimental conditions was made with the Priestly-Taylor method.

Keywords

• Crop coefficient,evapotranspiration,Priestly-Taylor,Rosa damascena Mill.

Yağ Gülünün (Rosa damascena Mill.) Bitki Su Tüketimi Tahmininde Kullanılabilecek Amprik Modeller

Abstract

Bu çalışma yağ gülünün (Rosa damascena Mill.) bitki su tüketimi tahmininde kullanılabilecek en uygun tahmin eşitliğini belirlemek amacıyla Süleyman Demirel Üniversitesi Tarımsal araştırma ve uygulama merkezinde 2010 ve 2011 yıllarında yürütülmüştür. A sınıfı buharlaşma kabından 10’ar günlük periyotta gerçekleşen buharlaşma toplamının 1.2 katı kadar sulama suyu uygulanmıştır. Bitki su tüketimi 10’ar günlük periyotlarda toprak nemi izlenerek belirlenmiştir. Ölçülen bitki su tüketimi, bitki su tüketimi tahmin yöntemlerinden Penman-Monteith, orjinal Penman, modifiye FAO-Penman, Priestly-Taylor, modifiye FAO-Radiation, FAO-modified Blaney-Criddle, SCS Blaney-Criddle, Hargreaves, modifiye FAO-Pan Evaporation, ve net radyasyon yöntemleri ile karşılaştırılmıştır. Ölçülen bitki su tüketimi ile bitki su tüketimi tahmin yöntemleri arasındaki ilişkinin karşılaştırmada korelasyon katsayısı (r), hata kareler ortalaması, (RMSE), sezonluk ortalama bitki katsayısı (Kc) göz önüne alınmıştır. Araştırma sonucunda deneme koşullarında Rosa damascena Mill. İçin en uygun bitki su tüketimi tahmin eşitliğinin Priestly Taylor yöntemi olduğu belirlenmiştir.

Keywords

• Bitki katsayısı,bitki su tüketimi,Priestly Taylor,Rosa damascena Mill.

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