NIGHT-TIME SAP FLOW RATE OF SWEET CHERRY TREES
Transpiration rates of five-year-old sweet cherry trees were measured day and night in summer period using the stem heat balance method. Three sections of the day were separated for analyzing the water consumption at each phase. Night-time means the period between 10 pm - 6 am, day-time is 6 am - 10 pm parted to morning (6 am - 2 pm) and afternoon segment (2 pm - 10 pm). Meteorological data were observed at the same time. Nocturnal transpiration increased with the water vapor deficit. Quadratic relation was found between sap flow rate at night and afternoon sap flow before the night. The morning sap flow as a dependent variable has shown exponential relation with the night time sap flow before the morning. Based on our measurements the night-time water demand depends on the meteorological conditions occurred before the dark period.
Juhász, A., Sepsi, P., Tőkei, L. and Hrotkó, K. (2013). NIGHT-TIME SAP FLOW RATE OF SWEET CHERRY TREES. Acta Hortic. 981, 591-596
nocturnal sap flow, Prunus mahaleb, VPD, night time water consumption