Tree heat pulse transpiration determinator and measuring method thereof

Abstract

The invention relates to the field of plant transpiration detection, and specifically discloses a tree heat pulse transpiration determinator and a measuring method thereof. The tree heat pulse transpiration determinator comprises multiple ways of stem flow sensors, an analog-digital conversion unit which is electrically connected with the stem flow sensors, a main control unit which is electrically connected with the analog-digital conversion unit, as well as an AVR (automatic voltage regulation) singlechip, wherein the main control unit and the AVR singlechip are respectively electrically connected with a heat pulse heating plate, and the heat pulse heating plate is respectively electrically connected with heating probes which are arranged corresponding to the multiple ways of stem flow sensors. The tree heat pulse transpiration determinator and the measuring method provided by the invention have the advantages that the power dissipation is low, the heat pulse heating time is flexible, the tree transpiration can be obtained by direct measurement, and the accuracy of measuring data is greatly improved.

Description

technical field [0001] The invention relates to the field of plant transpiration detection, in particular to a plant heat pulse transpiration measurement device and a measurement method thereof. Background technique [0002] The transpiration process of crops can promote the absorption and operation of water and nutrients, reduce the temperature of plants, and also play an important role in photosynthesis and dry matter accumulation of crops. It is an essential part of many research fields such as agricultural meteorology. At present, although there are many methods for measuring water consumption of crops, such as water balance method, Bowen ratio-energy balance method, weighing lysimeter method, etc., these methods can only measure the total amount of transpiration and evaporation, and it is difficult to measure the total amount of transpiration and evaporation. It is separated from evaporation, and it is time-consuming and labor-intensive. Therefore, how to accurately c...

AI Technical Summary

Problems solved by technology

However, after the existing sap flow meter and some instruments measure the sap flow of trees, it is still necessary to further convert the sap flow into transpiration, which requires high user operation and is not easy to operate; in addition, there is a disadvantage of high power consumption , which makes the actual field measurement difficult to achieve

Furthermore, the heating time of the thermal pulse is fixed, and the heating time cannot be adaptively changed according to the thermal motion characteristics of the data, which may easily lead to measurement failure; in addition, the heating of the thermal pulse is uncontrollable, and once the program runs away, the tree will be burned; in addition, the accuracy of the measurement data is not enough , can not guide the irrigation needs and other shortcomings

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