Method and system for controlling and evaluating preferential flow degrees of soil
A technology that prioritizes flow and soil. It is used in measuring devices, material analysis by optical means, instruments, etc. It can solve the problems of polluted groundwater, low fertilizer utilization efficiency, accelerated nutrient movement, etc., to increase crop yield and improve water and fertilizer utilization efficiency. Effect
Pending Publication Date: 2019-09-13
UNIV OF JINAN
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Problems solved by technology
The preferential flow path in farmland soil can cause accelerated movement of nutrients during water and fertilizer transportation, which in turn leads to problems such as low fertilizer use efficiency and groundwater pollution
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[0038] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
[0039] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0040] Implementation example one
[0041] This embodiment discloses a method for controlling and evaluating the degree of soi...
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The invention discloses a method and system for controlling and evaluating preferential flow degrees of soil. The method comprises a field dyeing tracing test step: collecting a dyeing profile image after the dyeing tracing test is finished; a picture processing and picture element extraction step: processing the dyeing profile image into a binary information matrix consisting of black and white,and converting the picture into a bitmap format; a parameter calculation and preferential flow degree evaluation step: selecting a representative preferential flow maximum infiltration depth, a representative soil profile dyeing area ration, a representative matrix flow area depth and a representative preferential flow fraction; and a preferential flow degree response analysis step: analyzing a linear relationship between irrigation volume levels and preferential flow indexes, and carrying out check analysis on the indexes under same irrigation volumes and different charcoal treatments.
Description
technical field [0001] The present disclosure relates to the technical field of soil cultivation, in particular to a method and system for resistance control and evaluation of soil preferential flow degree. Background technique [0002] The so-called preferential flow refers to the phenomenon that water and solute quickly migrate to the deep soil and groundwater along the preferential path in the soil (soil shrinkage cracks, root pores produced by root growth, and animal activity channels, etc.). The prerequisite for the occurrence of preferential flow is that there is a channel for its migration in the soil, that is, the existence of the preferential path, and secondly, it needs to be driven by hydrodynamic conditions. [0003] Studies have shown that the phenomenon of preferential flow in soil is not a special case. About 70%-85% of the water movement in soil is related to preferential flow, which is recognized as a potentially important infiltration mechanism in soil. Th...
Claims
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CPCG01N21/84
Inventor 徐征和丛鑫庞桂斌刘晗冯严明赵登良杨金梁牟晓宇邢寒冰
Owner UNIV OF JINAN