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Experimental method and experimental device for evaluating influence of phreatic evaporation on soil moisture of crop root layer

A soil moisture and crop root technology, applied in the field of soil water, can solve the problems of lack of actual measurement methods, inconvenience, and damage to the original structure of the soil.

Active Publication Date: 2018-12-14
INST OF WATER RESOURCES FOR PASTERAL AREA MINIST OF WATER RESOURCES P R C +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the inconvenience of field test conditions, it is difficult to quantitatively identify its influence. Traditional identification methods such as isotope method and indoor soil tank test method have their own defects. Sampling and testing have high requirements, and at the same time, there is a lack of verification of actual measurement methods; while the indoor soil tank test method destroys the original structure of the soil

Method used

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  • Experimental method and experimental device for evaluating influence of phreatic evaporation on soil moisture of crop root layer
  • Experimental method and experimental device for evaluating influence of phreatic evaporation on soil moisture of crop root layer
  • Experimental method and experimental device for evaluating influence of phreatic evaporation on soil moisture of crop root layer

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Embodiment 1

[0035] Embodiment 1, with reference to Figure 1 to Figure 4 as shown,

[0036] This embodiment provides an experimental device 100, which is used to detect the soil level in situ in the field without destroying the original structure of the soil body 101, so as to evaluate the impact of groundwater evaporation on the soil moisture in the root layer of crops .

[0037]This experimental device 100 includes a water-repelling bottom plate 110 and a water-repelling side plate 120. The water-repelling bottom plate 110 cooperates with the water-repelling side plate 120. The bottom of the water-repelling side plate 120 is in contact with the upper surface of the water-repelling bottom plate 110. The top of the side plate 120 is flush with the surface of the soil mass 101 to be studied when installed. The water-resisting side plate 120 and the water-resisting bottom plate 110 together form a soil accommodating space 102 , which is a relatively independent soil unit and serves as the...

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Abstract

The invention provides an experimental method and an experimental device for evaluating influence of phreatic evaporation on soil moisture of a crop root layer. The experimental method comprises the following steps: selecting two adjacent soil bodies, isolating an independent soil body unit as an observation group on one of the soil bodies, and using the other soil body as a control group withoutisolation; monitoring the soil moistures at corresponding positions of the soil bodies in the observation group and the control group respectively by using layered soil moisture observing equipment. The experimental device comprises a water isolating bottom plate and a water isolating side plate, wherein the water isolating side plate is vertically arranged on the water isolating bottom plate, andthe water isolating side plate and the water isolating bottom plate jointly enclose a soil body accommodating space isolated from external soil; at least two detection holes are formed in the water isolating side plate. Through the experimental method and the experimental device, direct in-situ detection in the field can be performed, an undisturbed soil body is not required to be destroyed, thedetection accuracy is high, economy, simpleness and convenience are achieved, and the time and the labor are saved.

Description

technical field [0001] The invention relates to the field of soil water, in particular to an experimental method and an experimental device for evaluating the influence of submerged evaporation on soil moisture in the root layer of crops. Background technique [0002] In areas with shallow groundwater burial depth, phreatic evaporation can be used as one of the important sources of water for vegetation (crop) growth and development, which has a certain impact on the change and distribution characteristics of root soil moisture, especially in arid and semi-arid areas with little precipitation. , it is particularly critical to identify whether and how phreatic evaporation affects soil moisture in vegetation roots. [0003] However, due to the inconvenience of field test conditions, it is difficult to quantitatively identify its influence. Traditional identification methods such as isotope method and indoor soil tank test method have their own defects. Sampling and testing hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/246
Inventor 宋一凡卢亚静严登华周星王丽晶张岑
Owner INST OF WATER RESOURCES FOR PASTERAL AREA MINIST OF WATER RESOURCES P R C
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