Portable tree transpiration measuring device and tree transpiration measuring method
A measurement method and technology of a measurement device, which are applied in the directions of biological testing, material inspection products, material thermal development, etc., can solve the problems of expensive instruments, complicated experimental steps, and high testing costs, and achieve simple and compact devices, simple measurement methods, and cost. low cost effect
Inactive Publication Date: 2014-06-11
NORTHWEST A & F UNIV
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Problems solved by technology
Plant transpiration water consumption testing instruments mainly adopt various photosynthetic measuring instruments imported from abroad. The instruments are expensive, the experimental steps are complicated, and the testing cost is high.
Method used
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experiment example
[0114] Experimental example: making a portable tree transpiration measuring device (also known as DMT-D dynamic measuring instrument), the specification diameter is 15cm, and the cylindrical leaf chamber (attached autcad figure) of 30cm in length, and notebook computer, data transmission line, hygrometer (simultaneously) With temperature measurement function) to form a measuring device. Put a twig with leaves about 10cm in length through the sliding door, then close the sliding door, read the humidity change value of the device from the first 30s to the first 60s, convert it into an absolute humidity value through the hygrometer's built-in software, and pass the laptop computer Based on the power function model, the measured data is linearly fitted to obtain the linear fitting coefficient E, which is then brought into the formula P r =E*V / S, where P r - leaf transpiration rate, (g m -2 ·s -1 ); E- transpiration rate per unit volume (g L s -1 ); V- volume of the leaf chambe...
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Abstract
The invention relates to the field of measurement of plant transpiration water consumption, and discloses a portable tree transpiration measuring device and a tree transpiration measuring method. The portable tree transpiration measuring device comprises a transparent horizontal cylindrical leaf chamber box, wherein an air-tight door is arranged on one side of the leaf chamber box, a horizontal isolation net is arranged in the leaf chamber box, a humidity sensor and a temperature sensor which extend into the box are arranged above the leaf chamber box, the humidity sensor and the temperature sensor are respectively connected with a data processor through data wires, and the data processor is used for acquiring humidity and temperature data in the box in real time and calculating and outputting tree transpiration measuring data. The measuring principle is scientific, the measuring method is simple and the equipment investment is low.
Description
technical field [0001] The invention relates to the field of plant transpiration water consumption measurement, in particular to a portable tree transpiration measurement device and a measurement method thereof. Background technique [0002] Water shortage has become a worldwide problem. The measurement of plant transpiration water consumption is an important means to study the characteristics of plant drought resistance, water-saving agriculture, water-saving forestry and ecological environment. The instruments used to test plant transpiration and water consumption mainly use a variety of photosynthetic measuring instruments imported from abroad. The instruments are expensive, the experimental steps are complicated, and the test cost is high. Contents of the invention [0003] The object of the present invention is to provide a low-cost, simple and practical portable tree transpiration measuring device and a measuring method based on the measuring device. [0004] In or...
Claims
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IPC IPC(8): G01N25/20G01N33/48
Inventor 汪有科梁宇汪星
Owner NORTHWEST A & F UNIV