Use of infrared thermometer technique in irrigation scheduling of pomegranate (Punica granatum L.) plant

• Published in: Derim Vol. 34; no. 1; pp. 61 - 71
• Main Authors: Begüm TEKELİOĞLU, Dursun BÜYÜKTAŞ, Cihan KARACA, Ruhi BAŞTUĞ, Nazmi DİNÇ, Köksal AYDİNŞAKİR
• Format: Journal Article
• Language: English
• Published: Bati Akdeniz Agricultural Research Institute 01.06.2017
• Subjects: Crop water stress index; Irrigation interval; Irrigation scheduling; Pan evaporation
• ISSN: 1300-3496; 1300-3496
• DOI: 10.16882/derim.2017.305480

The main objectives of this study are to assess crop water stress index (CWSI) and to determine irrigation schedule of pomegranate using infrared thermometer technique. Treatments with three replications were irrigated every three and six days intervals, as much as 0.50 (S1), 0.75 (S2), 1.00 (S3), and 1.25 (S4) of Class A pan evaporation. Additionally, an unirrigated plot was also formed. The equations obtained for non-water stress baseline is Tc-Ta=0.645VPD-4.338. The equation of full water stressed upper baseline obtained from data taken from branches of pomegranate plant cut in different days is given by Tc-Ta= 0.0489VPD+2.8734. According to the results obtained, it is concluded that infrared thermometer can be used for irrigation scheduling of the pomegranate plants in Antalya conditions. When using this technique in Antalya conditions, it is suggested to keep the seasonal mean CWSI value approximately 0.12 and the index value of 0.40 can be used to start the irrigation. Additionally, it is suggested that the amount of irrigation can be determined as much as the amount of evaporation measured until the index value reaches 0.40.