植物木质部压力探针测定技术与方法

木质部压力探针技术是目前直接测定植物木质部导管负压的唯一手段。在结构上，木质部压力探针测定系统由精密操作装置、压力探针系统和信号采集—传输一显示系统三大部分组成。其测定原理是将毛细管探针刺入木质部导管，通过传导介质将木质部导管负压传至压力传感器，压力传感器感应压力并将压力信号输出。本文从玻璃毛细管探针的制作、去气泡水的制备以及压力探针的校准、安装、测定等方面详细介绍了木质部压力探针的使用方法和注意事项。

Techniques and Methods for the Practical Use of Xylem Pressure Probes

Xylem pressure probes are the only technique used currently to measure plant xylem pressure directly. This technique includes devices for accurate positioning, pressure probe systems and signal acquisition. Negative pressure of the xylem vessels is transmitted to the pressure sensor by conduction medium when the capillary probe punctures the xylem vessels, with the pressure then detected and transmitted to the data acquisition system. In this paper, the use and precautions of xylem the preparation of glass capillary probes, and measurement of pressure probes.