Earth pillar simulation device based on soil water and salt transport rule

Abstract

The invention discloses an earth pillar simulation device based on a soil water and salt transport rule. The device comprises an earth pillar, sampling holes, an upper Marriott bottle, an infrared lamp, a liquid infusion box, a lower Marriott bottle, a first control valve, a second control valve and an iron support, wherein the iron support is provided with a second base and a first base which are vertical to each other; the earth pillar is arranged on the first base of the iron support; a plurality of sampling holes are respectively and uniformly distributed along different radial directions of the earth pillar around the periphery of the outer wall of the earth pillar; the bottom end and top end of the earth pillar are respectively connected with the bottom end of the lower Marriott bottle and the bottom end of the upper Marriott bottle; the top end of the lower Marriott bottle is connected with a first bottom end of the liquid infusion box through the first control valve; the liquid infusion box is arranged on the second base of the iron support; the second bottom end is connected with the top end of the upper Marriott bottle through the second control valve; and the infrared lamp is fixed on the top end of the iron support. According to the earth pillar simulation device, the simulation test functions can be expanded, and the simulation test cost is reduced.

Description

technical field [0001] The invention relates to soil monitoring technology, in particular to a soil column simulation device based on the law of soil water and salt migration. Background technique [0002] Land is the basic condition for human survival and all social activities. With the rapid development of modern industry, the demand for industrial land is increasing, and the world population is increasing, and the demand for agricultural land is also increasing. This creates irreconcilable contradictions between industry and agriculture in the use of land. Therefore, increasing the yield of crops in limited land is one of the effective ways to solve the contradiction, and providing crops with an appropriate amount of mineral nutrients through fertilization is one of the fundamental measures to ensure the yield and quality of crops. According to statistics, tens of millions of tons of fertilizers are applied to farmland every year in the world, but in practical applicatio...

AI Technical Summary

Problems solved by technology

[0006] 1. The simulation test function is simple, and multiple sets of devices are required to meet the water-salt test function, and the cost is high

[0007] For the existing soil column simulation test device, the soil column infiltration simulation test device and the soil column evaporation simulation test device are respectively designed for the infiltration test or evaporation test function. Each simulation test device can only be used to carry out the water infiltration process respectively. Soil water-salt migration test, or only a simple evaporation test, because the simulation test device needs to be designed separately for the infiltration test and the evaporation test, the cost of the simulation test is relatively high; further, after the infiltration test is completed , it is impossible to obtain undisturbed samples that meet the needs of subsequent evaporation tests, and it is also impossible to simulate different intensities of stable water evaporation tests under the condition of fixed groundwater depths

[0008] Second, the accuracy of the simulation test is low

[0009] The existing soil column simulation test device samples through a single sampling hole. After repeated sampling, the soil in the soil column will form a cavity, which affects the accuracy of the test.

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