Device for correcting sap flow measurement of trunk xylem

Abstract

The invention discloses a device for correcting sap flow measurement of a trunk xylem. The device comprises a water storing device, a water compensating box and a data acquiring device, wherein the water storing device is arranged at an incision position on the trunk xylem, and a chamber body communicated with the incision for storing water is arranged on the water storing device; the water compensating box is used for automatically compensating water to the water storing device, and a probe for measuring the variation of the water level is arranged in the water compensating box; the data acquiring device is used for receiving and recording the variation information of the water level from the probe, wherein the data of the variation of the water level in the water compensating box is continuously recorded via the data acquiring device, so that the dynamic variation of the sap flow in the trunk xylem can be automatically and continuously observed. According to the device disclosed by the invention, the water storing device is configured as a sealed structure by which the free evaporation of the water inside can be effectively reduced, so that the accuracy of the device in measurement can be improved; and moreover, the data can be automatically and continuously collected by adding the water level measuring probe and the data acquiring device in the water compensating box.

Description

technical field [0001] The invention relates to a device for rectifying and measuring the xylem sap flow of a tree trunk. Background technique [0002] Transpiration is not only an important physiological activity of trees, but also of great significance to the water cycle and energy cycle of forest ecosystems. Since more than 99.8% of the trunk sap flow is used for tree transpiration, it can be used to directly reflect the ability of trees to consume water. [0003] At present, it is widely accepted to measure tree trunk xylem sap flow by thermal techniques (thermal diffusion, thermal pulse, thermal balance, etc.) to estimate tree transpiration. However, limited by the existing technology, there are still some errors in estimating tree transpiration with this method, and necessary correction experiments are required. [0004] "Cut tree experiment" is a method commonly used to correct thermal techniques to measure trunk xylem sap flow and tree transpiration. Because the w...

AI Technical Summary

Problems solved by technology

In the past, most of this method was manually operated, and the water supply device used for xylem incision was often an open top, which did not take into account the free evaporation of the water surface in the container, let alone realize the automation of observation, which greatly affected the accuracy and accuracy of the measurement. Continuity brings certain limitations

Images