1. Kısıtlı Sulama Koşullarında Zeytin Ağaçlarında Özsu Akışı ve Stoma İletkenliğindeki Değişimin Belirlenmesi.
- Author
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ERTEM, Erkal and AKKUZU, Erhan
- Subjects
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DEFICIT irrigation , *SAP (Plant) , *STOMATA , *IRRIGATION water , *WATER use , *OLIVE - Abstract
Water stress is one of the important environmental constraints limiting olive productivity. This study was carried on olive (cv. Memecik) trees in Bornova Olive Research Institute in 2017. In this study, changes in stomatal conductance (gs) and sapflow under the deficit irrigation conditions were observed. For this reason, four treatments were applied as follows; K1: non-irrigated (rainfed), K2: 100% ET, K3: 66% ET, K4: 33% ET. In this study (01/06/2017-30/09/2017), irrigation water requirement was ranged from 0 to 912 mm, evapotranspiration (ETa) varied from 91 to 851 mm. The mean stomatal conductance (gs) values calculated for during the period were 293.83 mmol m-2 s-1for K1, 382.62 mmol m-2 s-1 for K2, 371.50 mmol m-2 s-1 for K3 and 293.57 mmol m-2 s-1 for K4. The mean sapflow values calculated during the period were 0.054 ml cm-2 min-1for K1, 0.091 ml cm-2 min-1 for K2, 0.073 ml cm-2 min-1 for K3 and 0.065 ml cm-2 min-1 for K4. The seasonal average of the transpiration rate, which shows the ratio of the sap flow rate of the treatment to the sap flow rate of the control treatment (K2) in olive trees, was found to be 0.59, 1, 0.80, 072 for K1, K2, K3 and K4, respectively. According to the data obtained in this study, the difference between the stomatal conductance values of treatments was statistically significant. An important finding of the research is that there is a positive linear (r2 = 0.528) relationship between stomatal conductance and sap flow. In the light of the data obtained; It can be stated that stoma conductivity (gs) and plant sap flow measurement values can be used to determine the water stress of olive trees. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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