DETERMINATION OF GROWING DEGREE-DAY (GDD) VALUES: PISTACHIO (PISTACIA VERA L.) CASE

Abstract

Pistachio is a drought-tolerant fruit that can be grown in arid areas under limited water conditions. Therefore, in our country, most of the cultivation is done in Southeastern Anatolia. Therefore, The Southeastern Anatolia Region was determined as the research area. Growing Degree Day Method (GDD) was also used as the method in this study. GDD values: Long-term daily maximum and minimum temperature values of the provinces in our region are used. Growing degree-day values are calculated according to the recommended temperature values for phenological periods of pistachio. According to GDD values, Kilis and Adlyaman were determined as the second most proper growth area after Sanhutfa. It may be suggested due to the similarity between the geographical, soil, topographical and ecological structures of Kilis with those of Gaziantep that studies should be carried out. for improving pistachio cultivation and that projects should be carried out for increasing yield per tree based on the consideration that it is not possible to increase areas of agriculture. Therefore, this and other similar studies will result in attaining higher yields by carrying out production activities in suitable areas while also contributing to the country economy.