Device for rapidly and accurately determining hydraulic conductivity of plants

Abstract

The invention discloses a device for rapidly and accurately determining hydraulic conductivity of plants. The device comprises: a water container; a pipeline bubble removal mechanism, an inlet end of which communicates with the water container; a micro flowmeter, an inlet end of which communicates with an outlet end of the pipeline bubble removal mechanism; and a sample placement mechanism, an inlet end of which communicates with an outlet of the micro flowmeter and which is used for the placement of a plant sample to be measured. The device for determining hydraulic conductivity of plants has a simple structure, is convenient to make and has good sealing performance. Simultaneously, as a contemporary Tech-product (the micro flowmeter) is introduced in the invention, the device is characterized by simple operation, high-efficiency and accurate determination and the like during the process of determining the plant sample.

Description

technical field [0001] The invention relates to a device for quickly and accurately measuring the hydraulic conductivity of plants, and belongs to the technical field of measuring the hydraulic conductivity of plants. Background technique [0002] Water physiology and ecology is one of the three core contents (energy, water, nutrition) in the study of plant physiology and ecology. To a large extent, water determines the adaptability of plants to the environment, because water affects the distribution, morphological establishment, and various physiological activities of plants in the process of growth and development on land. Since the 1970s and 1980s, a large number of literatures have reported on water absorption, transportation and loss in plants, water balance in plants and plant responses to water stress, etc., and gradually formed and It has perfected the theoretical basis for the study of plant water transport, that is, the soil-plant-atmosphere system (SPAC) theory: ...

AI Technical Summary

Problems solved by technology

For example, the high pressure flow meter (High Pressure Flow Meter, HPFM; designed by Professor Tyree M.T. of the United States and produced by Dynamax Company) and the xylem embolism meter (Xylem Embolism Meter, XYL'EM; INRA Licensed Instrumentec Company, according to the French Professor Cochard's) have been commercialized abroad. Design and production), but these instruments are expensive, the production principle is complicated, and the maintenance is difficult.

There are also several laboratories in China that have designed relevant simple instruments based on the principle of the flushing method, but these self-made instruments have disadvantages such as complex processes in the production process, need to self-made some parts, resulting in poor sealing performance, cumbersome measurement, and inaccuracy.

For example, "a device capable of simultaneously measuring the hydraulic conductivity of multiple sample plants" (publication number CN 201628707U) developed and declared by the Rubber Research Institute of the Chinese Academy of Tropical Agricultural Sciences, although this device can simultaneously measure the hydraulic conductivity of multiple sample plants, but It can only measure the maximum hydraulic conductivity of xylem, not the actual hydraulic conductivity of plants, and cannot reflect the embolization degree of plants and the influence of water on plants in the natural state.

Moreover, when measuring low hydraulic conductivity plants, the above instruments and devices all have the disadvantages of insufficient measurement range, inaccurate measurement and long required time.

Images