A device for measuring the amount of water lifted by plant roots at night

Abstract

The invention discloses a plant root system night water delivery capacity measuring device, and belongs to the technical field of soil water measuring. The device comprises an outer shell and an innershell with upper openings, a first base plate is arranged in the middle of the outer shell, and the outer shell is divided into an upper region and a lower region through the first base plate; a through hole is formed in the first base plate, the inner shell is arranged at the region below the first base plate, and a second base plate is arranged at the bottom of the inner shell; a center supportis arranged below the second base plate, and the inner shell is fixed through the center support; a pressure sensor is arranged between the center support and the second base plate, and the pressuresensor is connected with a weight displayer. Weight at the upper space is converted into supporting force at the lower space, the measuring range of the pressure sensor is narrowed, and the effect ofmagnifying the relative changing amount of pressure measured by the pressure sensor is achieved; meanwhile, the device is easy to assemble, low in operation requirement and convenient to use, the measuring cost and the maintenance cost are lowered, and on the basis, the requirement for measuring precision of the plant root system night water delivery capacity can be met.

Description

Technical field [0001] The invention belongs to the technical field of soil moisture measurement, and specifically relates to a device for measuring the amount of water raised by plant roots at night. Background technique [0002] In some areas of our country, the soil has poor water storage capacity, which is dry on the top and wet on the bottom. Most of the roots of plants are often distributed in the upper soil. If the upper soil is in a relatively dry state, it will affect the growth and development of plants. [0003] Root water lifting means that under low transpiration conditions, mainly at night, the difference in water potential of the soil in different parts of the root system of the plant causes the root system in the lower moist area to absorb water and transport it to the upper root system in the dry area, and pass this The water movement phenomenon in which part of the upper root system releases part of the water into the dry soil around the rhizosphere is a physiolog...

AI Technical Summary

Problems solved by technology

[0007] Purpose of the invention: The object of the present invention is to provide a device for measuring the amount of water lifted by plant roots at night. The overall weighing method is used to measure the pressure change at night through a pressure sensor to obtain the amount of water lifted by the roots of the plant at night, and the upper soil is moved by gear transmission. The gravity is converted into the supporting force for the lower soil, amplifying the relative change of the measured pressure, greatly improving the measurement accuracy, and solving the shortcomings of the existing soil moisture measurement such as high cost, complicated steps, low accuracy, and large fixed-point measurement errors.

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