Soil moisture meter

A technology of soil hygrometer and humidity, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., and can solve the problem of low measurement accuracy of soil moisture

Active Publication Date: 2014-10-08
HANGZHOU BAIBAN BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of low measurement accuracy of soil moisture at present, and proposes a soil hygrometer, which can directly measure the osmotic pressure of crop roots. This hygrometer has simple structure and low cost, and is suitable for large-area crop cultivation Monitoring of soil moisture during the process

Method used

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Embodiment Construction

[0011] like figure 1 The cross-sectional view of the soil moisture meter is shown. The soil moisture meter is a cylindrical structure, including a sealed cavity 6, two sets of fiber tube bundles (1, 2), two parts of semi-permeable membranes (3, 4), salt ion solution 8, humidity sensitivity Ink 5 and transparent plastic 7, the cylindrical fiber tube bundle 2 is attached to the top and upper inner side wall of the sealed cavity 6, and the bottom of the cylindrical fiber tube bundle 2 is open; There is humidity-sensitive ink 5 on the top of the cylindrical fiber tube bundle 2; the top of the sealed cavity 6 is made of air-permeable transparent plastic 7, which can directly identify the humidity-sensitive ink with the naked eye; there is a columnar fiber tube bundle 1 in the sealed cavity 6, from which 6 The upper half of the inner cavity extends to the outside of the sealed cavity 6, and the cylindrical fiber bundle 1 is not in contact with the cylindrical fiber bundle 2; the out...

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Abstract

The invention relates to a soil moisture meter. A cylindrical fiber bundle is attached to inner side walls of the top and upper part of a sealing cavity; a semipermeable membrane layer is attached to the inner side wall of the cylindrical fiber bundle; humidity-sensitive ink is arranged on the top of the cylindrical fiber bundle; the top of the sealing cavity is made of breathable transparent plastic; a columnar fiber bundle is arranged in the sealing cavity and extends from the upper half part of the inner cavity of the sealing cavity to exterior of the sealing cavity; the columnar fiber bundle in the sealing cavity is not contacted with the cylindrical fiber bundle; another semipermeable membrane is attached to the outer side of the columnar fiber bundle and goes beyond the top of the columnar fiber bundle to reach the top of the cylindrical fiber bundle; a saline ion solution with osmotic pressure is fed between the first part of the semipermeable membrane and the inner wall of the sealing cavity. The soil moisture is monitored through difference of the osmotic pressure in root cells and osmotic pressure of the outside, and the plant root water absorption conditions can be really and sensitively reflected. The soil moisture meter is simple in structure and low in cost and is suitable for monitoring the soil moisture in a large-area crop cultivation process.

Description

technical field [0001] The invention relates to a soil moisture meter. Background technique [0002] Soil moisture determines the water availability of crops. If the soil humidity is too low, the soil will be dry, photosynthesis will not be carried out normally, and the yield and quality of crops will be reduced; severe water shortage will cause crops to wither and die. Excessive soil humidity will deteriorate soil aeration, affect the activities of soil microorganisms, and hinder the respiration and growth of crop roots, thereby affecting the normal growth of crop aboveground parts, resulting in leggy growth, lodging, and disease breeding. The absorption of soil water by crops is mainly carried out at the root tip, and the main driving force is the concentration difference of the root tip cell fluid, that is, the osmotic pressure. [0003] There are many traditional ways to measure soil moisture, but essentially they all measure the amount of water in the soil. The probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04
Inventor 张扬
Owner HANGZHOU BAIBAN BIO TECH
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