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Apparatus for measuring water potential of organic substrate

A technology based on organic matrix and water potential, which is applied in the fields of soil material testing, material inspection, etc., to achieve the effects of high measurement accuracy, good promotion value, and convenient production

Inactive Publication Date: 2009-05-20
ZHEJIANG UNIV
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Problems solved by technology

[0003] In order to solve the problem of measuring the water potential of the organic matrix, the object of the present invention is to provide a device for measuring the water potential of the organic matrix, which can quickly, accurately and batch-wise measure the water potential of the organic matrix

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  • Apparatus for measuring water potential of organic substrate

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Embodiment Construction

[0019] As shown in the drawings, the present invention includes a pressure control panel 14, a pressure reducing valve 2, a low-pressure pressure chamber 11-2 with a ceramic filter plate in it, a high-pressure pressure chamber 11-1 with a ceramic filter plate in it, and a high-pressure gas cylinder 1; :

[0020] In the pressure control panel 14: comprise pressure reducing valve 3, filter 4, six throttling valves (5-1,5-2,5-3,5-4,7-1,7-2, four precision reducing valves Pressure valves 6-1, 6-2, 6-3, 6-4 and two precision pressure gauges 8-1, 8-2; the first throttle valve 5-1 and the first precision pressure reducing valve 6-1 in series connected, the second throttle valve 5-2 is connected in series with the second precision pressure reducing valve 6-2, the third throttle valve 5-3 is connected in series with the third precision pressure reducing valve 6-3, and the fourth throttle valve 5 -4 is connected in series with the fourth precision pressure reducing valve 6-4, and the i...

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Abstract

The invention discloses a device for measuring the water potential of an organic substrate, which comprises a pressure measurement panel, a pressure relief valve, a low pressure chamber of which the inside is provided with a ceramic plate, a high pressure chamber with of which the inside is provided with a ceramic plate, and a high-pressure gas cylinder. The high-pressure gas cylinder is connected with the low pressure chamber of which the inside is provided with the ceramic plate and the high pressure chamber of which is provided with the ceramic plate through the pressure relief valve and the pressure measurement panel respectively. Specimen cups containing the organic substrate are placed on the ceramic filter plates of the pressure chambers. The device can perform the synchronous measurement on water potentials of specimens with low-pressure (5Bar) and high-pressure (15Bar) ranges. Air supply pressures in the pressure chambers are preset through the high-stability and high-precision pressure measurement panel, the specimens are placed on the ceramic plates in the pressure chambers, and water potentials of the specimens to be measured are tested, calculated and determined by observing the water output condition of the pressure chambers. The device is characterized in that the device has high precision, good repeatability, easy popularization, and convenient measurement, and has practical significance on the research and development of the organic substrate and the cultivation management special in China.

Description

technical field [0001] The invention relates to a measuring device, in particular to a device for measuring the water potential of an organic matrix. Background technique [0002] The water potential of the substrate is an important indicator to characterize the water condition available for crop growth in the cultivation substrate. For a long time, there has been no uniform standard for the ratio of organic substrates and the irrigation of substrate cultivation, resulting in blind development of substrates and waste of water resources, and lack of basis for cultivation management. The soil water potential measurement device has the disadvantages of complex operation, great influence on test conditions, and poor repeatability. It lacks rapid and accurate measurement equipment for my country's unique organic substrates, which is not conducive to the healthy development of my country's facility substrates. Contents of the invention [0003] In order to solve the problem of ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 沈明卫何勇郝飞麟冯雷
Owner ZHEJIANG UNIV
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