A New Transpiration-Embolism Curve Model Based on Ultrasonic Acoustic Emissions

Ultrasoinc acoustic emissions (UAEs) can be used as index of plant water deficit. In order to avoid background noise interference, the UAEs detecting frequency is more than 100 KHz. The relationships between conduits embolism and transpiration describe mathematical relationship degree physiologies, namely transpiration-embolism curve (TEC). physiological activities are closely related with body reserving from 8:00 14:00 when it sunny, light adequate. grow rapidly 9:00 11:00, concave convex characteristics Logistic not obvious, same inflection point. general, maximum rate occurs while reach 1h later. Before irrigation, in serious stress conditions, soil content low, below 50 times before 7:00 after 18:00, long duration. After do appear peak, will decrease or disappear, a small peak 2h later, lag short time, length time has strong degree. Studies have shown that sensitive other words, potted shows sensitivity transpiration, high improve vulnerability.