Study on stem flow characteristics of Tamarix ramosissima with a wrapped plant stem flow measuring instrument
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Tamarix ramosissima is a common Salix shrub in arid regions, with many branches and taros that are hi light, drought-resistant and high-temperature resistant. In areas with extremely high temperatures of 47.6 °C, precipitation of 20 mm, and evaporation of 3,000 mm or more, normal groundwater growth can still be utilized. Strong cold resistance, no frost damage at extreme minimum temperature -44°C, especially salt tolerant ability, good growth when the total salt content in the soil reaches 1.4%, when the soil total salt content reaches 2% to 3% It can grow tenaciously; it resists sand burying, when the sand fills the branches, the shoots give birth to adventitious roots, and the new shoots can grow to the ground; they are resistant to water and moisture, and they can grow normally in low-lying saline and alkaline lands. Because of its characteristics of drought resistance, high temperature resistance and salt and alkali resistance, it has been widely used in desertification management in recent years. In the desert highway protection in the hinterland of the Taklamakan Desert, the construction of Tamarix ramosissima is one of the most important aspects. Therefore, the flow characteristics of stems of Tamarix spp. The main environmental factors of flow change can provide the basis for vegetation construction in sandy areas.
The packaged plant stem flow measurement instrument is the most accurate and reliable sensor for measuring the water use status of plants directly. It is the main tool for crop cultivation, plant water relations and plant biomass estimation. The principle of wrapping plant stem flow measurement instrument is to use the principle of energy balance and apply energy balance sensor to determine the sap flow of plants and the water consumption (transpiration) of plants by measuring the change of heat generated during the transportation of water.
In the experiment, stem-flow characteristics and water consumption of stems of Tamarix ramosissima plantation on the desert road in the hinterland of the Taklimakan Desert were studied using a packaged plant stem flow measurement instrument. The results showed that the stem flow of Tamarix ramosissima showed a single-peak curve pattern with obvious diurnal variation. The stem fluid flow fluctuates with the change of environmental factors. Under the conditions of sufficient soil moisture, the total radiation, wind speed, and temperature are The main environmental factors affecting changes in sap flow.