An anhydrous soil matric potential profile measuring device

Abstract

The invention discloses a water-free soil matrix potential profile measurement device which comprises not less than one water-free soil matrix potential sensor unit, a conical drill bit and an impact handle, wherein the conical drill bit, the not less than one water-free soil matrix potential sensor unit and the impact handle are sequentially connected in series by virtue of connecting screw rods so as to form a cylindrical whole. The water-free soil matrix potential profile measurement device disclosed by the invention is suitable for long-term soil matrix potential research; compared with previous products, the device has the advantages that installation and application programs can be greatly simplified, and the equipment level in the field of the soil matrix potential research in China is effectively improved. The adverse factors such as tedious operations, large edge effect and low degree of automation in a conventional soil matrix potential measuring instrument are effectively overcome. With the adoption of the water-free soil matrix potential profile measurement device, the measurement of low edge effect and profile integration can be very well realized, the soil matrix potential can be automatically acquired, the working efficiency is greatly improved, and the application of the device has very high scientific values.

Description

technical field [0001] The invention relates to the technical field of soil matrix potential profile measurement, in particular to an anhydrous soil matrix potential profile measurement device. Background technique [0002] Soil matric potential represents the energy state of water in soil and is the fundamental driving force of soil water movement, while soil matric potential studies the movement process, law and mechanism of water in soil. At present, the study of soil matric potential has become the basic and frontier research field of soil science, ecology, water resource science, resource and environmental science and other related disciplines, and has been paid more and more attention. Matric potential measurement is an important means of soil matric potential research. Anhydrous soil matric potential profile measurement device is an important device for indoor and field soil matric potential research. Domestic soil matric potential measurement devices generally use m...

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Problems solved by technology

Anhydrous soil matric potential profile measurement device is an important device for indoor and field soil matric potential research. Domestic soil matric potential measurement devices generally use mercury negative pressure gauges based on the principle of interconnectors and dry negative pressure gauges based on the principle of heat capacity. In the long-term measurement process, the mercury negative pressure gauge needs to frequently replenish clean anhydrous water, and requires a lot of labor for installation and observation records; the dry negative pressure gauge is similar to the mercury negative pressure gauge in the measurement process, Each negative pressure gauge can only measure the soil matric potential of one layer, and it is difficult to measure the distribution of the continuous and automatic measurement of the special matric potential on the same section, which brings certain difficulties to a large number of researches on the soil matric potential. Buried, the soil around the device is greatly disturbed during the installation process, and the influence of boundary effects greatly reduces the accuracy of soil matric potential measurement. Therefore, it is necessary to develop an anhydrous soil matric potential profile measurement device that can be maintenance-free and easy to install. , low investment, can meet the needs of vertical continuous automatic measurement, and provide important equipment condition support for promoting soil matric potential research

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