Method and apparatus for detecting water-retaining quantity among field of soil

A field water holding capacity and measuring device technology, applied in the direction of soil material testing, test sample preparation, material inspection products, etc., can solve the problem that it is difficult to determine when to completely or basically eliminate gravity water, etc., to save water for measurement, Easy to carry and easy to measure

Inactive Publication Date: 2007-06-13
CHINA AGRI UNIV
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Problems solved by technology

However, since the internal drainage or redistribution of soil is a continuous process, especially for soil with heavy viscosity, it is difficult to determine when gravity water is completely or basically excluded, which is the main "controversy" of the existing methods

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  • Method and apparatus for detecting water-retaining quantity among field of soil

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] The rapid measuring device for measuring soil field water holding capacity by imbibition method of the present invention comprises:

[0036] A water supply container 4 whose upper end communicates with a water supply source; an air intake control pipe 3 and a water supply pipe 6 installed on the lower pipe wall of the water supply container 4; the vertical lower end of the water supply pipe 6 communicates with a water dispenser 7; The vertical lower half of the air intake control pipe 3 is placed in a soil drilling cone 2, between the lower end air inlet 1 of the air intake control pipe 3 and the pipe wall of the soil drilling cone 2 A gap is left so that the air inlet 1 is lower than the soil surface and is still in contact with the atmosphere; the bottom of the sprinkler 7 is higher than the lower air inlet of the air intake control pipe 3 in the soil drilling...

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Abstract

The invention relates to measuring method and device for water-holding capacity between internal drainage. The method is absorbing method that includes the following steps: using the internal drainage matric potential to absorb water into soil, when reaches the maximum amount of water, measuring the soil water content. The measuring device includes water supplying container, gas intake control pipe and water supplying pipe, a douche. The down half part is in the drilling cone barrel, and there is clearance between the down end of air intake control pipe and drilling cone barrel. The bottom of douche is higher than the bottom of air intake control pipe for 1-2cm. the invention has the advantages of time saving, water saving and is more suitable for clayed soil.

Description

technical field [0001] The invention belongs to the fields of farmland irrigation and crop water management, and relates to a method and device for measuring soil moisture characteristic constant field water capacity, in particular to a method for quickly measuring soil field water capacity and a measuring device thereof. Background technique [0002] Soil moisture status in farmland is an important factor affecting crop growth. Field soil water holding capacity is an important index to measure soil water retention, and is also an important parameter for farmland irrigation and crop water management. It is usually regarded as the upper limit of crop available water. A long time ago, it was believed that the flow of water and the change of water content in the soil after irrigation decreased with time, and the water flow rate generally decreased to a negligible level within a few days, or even stopped completely, and the water content of the soil after the internal drainage w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N1/28
Inventor 雷廷武江培福武阳李鑫毛丽丽
Owner CHINA AGRI UNIV
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