CN-121970562-A - Water-saving salinization-control water and fertilizer irrigation method and system based on wet salt dynamic monitoring

CN121970562ACN 121970562 ACN121970562 ACN 121970562ACN-121970562-A

Abstract

The invention relates to the technical field of water-saving irrigation and discloses a water-saving salinization-control water and fertilizer irrigation method and a system based on wet salt dynamic monitoring, wherein the method comprises the steps of carrying out dielectric parameter inversion on a target cultivated land area to obtain soil water content data and soil conductivity data; the method comprises the steps of constructing a water-salt fortune profile of a target cultivated land area to identify a salt surface aggregation area and a salt bottom layer accumulation area of the target cultivated land area, analyzing the form concentration of the salt surface aggregation area, carrying out water-salt balance allocation on the target cultivated land area to obtain a coverage leaching irrigation strategy, encoding the coverage leaching irrigation strategy into a drip irrigation regulation instruction of the target cultivated land area, carrying out state evolution analysis on the salt bottom layer accumulation area to obtain salt peak value change and depth position information, carrying out deep leaching correction on the coverage leaching irrigation strategy to generate a local strong drainage irrigation instruction of the target cultivated land area, and improving the efficiency of water-saving salinization control water fertilizer irrigation based on wet salt dynamic monitoring.

Inventors

ZHANG ZHENGJIE
LI QINGLIN
LV DUO
Dang Renmei
DENG XIMING

Assignees

酒泉市农业科学研究院

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (10)

1. The water-saving salinization control water and fertilizer irrigation method based on wet salt dynamic monitoring is characterized by comprising the following steps of: Performing dielectric parameter inversion on the target cultivated land area to obtain soil water content data and soil conductivity data of the target cultivated land area; carrying out multi-layer grid superposition on the soil water content data and the soil conductivity data, and constructing a water-salt fortune profile of a target cultivated land area so as to identify a salt surface aggregation area and a salt bottom layer accumulation area of the target cultivated land area; analyzing the morphological concentration of the salinity surface aggregation area, and carrying out water-salt balance allocation on the target cultivated land area based on the analyzed spatial distribution range and the salinity concentration to obtain a coverage leaching irrigation strategy of the target cultivated land area; Coding a coverage leaching irrigation strategy as a drip irrigation regulation and control instruction of a target cultivated land area, and carrying out state evolution analysis on a salt bottom layer accumulation area based on regulated irrigation feedback data to obtain salt peak value change and depth position information of the salt bottom layer accumulation area; And carrying out deep leaching correction on the covering leaching irrigation strategy according to the salinity peak value change and the depth position information, and generating a local strong drainage irrigation instruction of the target cultivated land area.
2. The water-saving salinization-control water and fertilizer irrigation method based on wet salt dynamic monitoring according to claim 1, wherein the performing dielectric parameter inversion on the target cultivated land area to obtain soil water content data and soil conductivity data of the target cultivated land area comprises: Collecting variable-frequency electromagnetic reflection signals of a target cultivated area, and separating amplitude attenuation data and phase deviation data of the variable-frequency electromagnetic reflection signals; Carrying out spectrum envelope reconstruction on the amplitude attenuation data and the phase shift data to obtain a complex impedance spectrum characteristic curve of the target cultivated land area; Identifying characteristic points of the complex impedance spectrum characteristic curve, and extracting impedance real part data and impedance imaginary part data corresponding to characteristic frequency points in the complex impedance spectrum characteristic curve; And carrying out complex response parameter analysis on the impedance real part data and the impedance imaginary part data to obtain soil moisture content data and soil conductivity data of the target cultivated area.
3. The water-saving salinization-control water and fertilizer irrigation method based on wet salt dynamic monitoring as set forth in claim 1, wherein the multi-layer grid superposition of the soil water content data and the soil conductivity data is performed to construct a water-salt fortune profile of a target cultivated land area, comprising: dividing a target cultivated area into a plane grid according to a preset spatial resolution; Based on the geographical position of the soil water content data and the soil conductivity data, carrying out layered data embedding on the planar grid to obtain multi-layer grid data of a target cultivated area; Performing trend surface fitting on the multilayer grid data to obtain a soil moisture content space continuous distribution curved surface and a soil conductivity space continuous distribution curved surface of a target cultivated area; Carrying out space superposition fusion on the soil water content space continuous distribution curved surface and the soil conductivity space continuous distribution curved surface to obtain a water-salt attribute superposition layer of the target cultivated area; and carrying out three-dimensional voxel stacking on the water-salt attribute superposition layers according to the sequence from shallow to deep of the soil layer, and obtaining a water-salt fortune profile of the target cultivated land area.
4. The water-saving salinization-control water and fertilizer irrigation method based on wet salt dynamic monitoring according to claim 1, wherein the identifying of the salt surface aggregation area and the salt bottom layer accumulation area of the target cultivated land area comprises: Carrying out vertical layering analysis on the water-salt fortune profile to obtain surface soil conductivity data and deep soil conductivity data of the water-salt fortune profile; Marking grids with surface soil conductivity data exceeding a preset crop salt tolerance threshold as surface aggregation seed points of a water salt fortune profile, and marking grids with deep soil conductivity data with local peaks in the depth direction as accumulated seed points of the water salt fortune profile; Carrying out space connected domain analysis on the surface polymerization seed points, and merging the covering areas of the surface polymerization seed points which are mutually adjacent and continuously distributed into a salinity surface polymerization area of the target cultivated land area based on an analysis result; and performing connectivity expansion on the accumulated seed points in the horizontal direction to obtain a salinity bottom layer accumulated area of the target cultivated area.
5. The water-saving and salinization-controlling water and fertilizer irrigation method based on wet salt dynamic monitoring as set forth in claim 1, wherein the morphological concentration analysis of the salt surface aggregation zone comprises: performing discrete point location mapping on the water salt fortune profile to obtain a space distribution lattice of a salt segregation region; based on the space distribution lattice, carrying out boundary tracking on the salination surface aggregation region to obtain an outer edge contour line of the salination surface aggregation region; measuring a closed region of the peripheral contour line to obtain a spatial distribution range of the salination surface aggregation region; And carrying out mathematical index analysis on the soil conductivity data of the salinity surface polymerization zone to obtain the salinity concentration of the salinity surface polymerization zone.
6. The water-saving salinization-control water and fertilizer irrigation method based on wet salt dynamic monitoring as set forth in claim 1, wherein the performing water-salt balance adjustment on the target cultivated land area based on the resolved spatial distribution range and the resolved salt concentration to obtain a coverage leaching irrigation strategy of the target cultivated land area comprises: dividing the working area of the target cultivated land area based on the space distribution range of the salination surface aggregation area to obtain a coverage leaching working area of the target cultivated land area; According to the salinity concentration of the salinity surface polymerization zone, calculating the predicted leaching water depth of the salinity surface polymerization zone by combining the field water holdup parameter and the water infiltration rate parameter of the soil layer below the salinity surface polymerization zone; performing space correlation compiling on the coverage leaching operation area and the predicted leaching depth to obtain coverage leaching irrigation execution parameters of the target cultivated land area; and (3) carrying out time sequence rule integration on the coverage leaching irrigation execution parameters to obtain a coverage leaching irrigation strategy of the target cultivated land area.
7. The water-saving salinization-control water and fertilizer irrigation method based on wet salt dynamic monitoring as set forth in claim 6, wherein the estimated leaching water depth is calculated as follows: ; In the formula, In order to predict the depth of the rinse water, For the salt concentration in the salt surface polymerization zone, Is the soil volume weight of the soil layer below, For the thickness of the salting-out zone, For the salt concentration of irrigation water, For a predetermined coefficient of the rinsing efficiency, In order to achieve a moisture penetration rate, For the water retention rate in the field, To be with natural constant An exponential function of the base.
8. The water-saving and salinization-controlling water and fertilizer irrigation method based on wet salt dynamic monitoring as set forth in claim 1, wherein the performing state evolution analysis on the salt bottom layer accumulation region based on the regulated irrigation feedback data to obtain salt peak value change and depth position information of the salt bottom layer accumulation region comprises: extracting a time sequence section of a salt bottom layer accumulation region in the regulated irrigation feedback data; Analyzing the vertical distribution characteristics of the time series section, and positioning the depth position of the response of the extreme value of the soil conductivity in the accumulation area of the salinity bottom layer; Taking the soil conductivity value and the depth data of the depth position as instantaneous peak salinity and instantaneous peak depth of a salinity bottom layer accumulation area; And according to the time sequence, analyzing the change rule of the instantaneous peak salinity and the instantaneous peak depth to obtain the salinity peak change and depth position information of the salinity bottom layer accumulation area.
9. The method for water-saving salinization-controlled water and fertilizer irrigation based on wet salt dynamic monitoring as set forth in claim 1, wherein the performing deep leaching correction on the coverage leaching irrigation strategy according to the salt peak value change and the depth position information to generate a local forced-drainage irrigation instruction of the target cultivated land area comprises: When the attenuation rate in the salt peak change is lower than a preset leaching efficiency threshold value and the downward moving distance in the depth position information does not reach a preset safety depth threshold value, judging that the operation type of the salt bottom layer accumulation area is local forced drainage operation; In the process of local forced drainage operation, according to the attenuation amplitude in the salt peak value change and the downward movement rate in the depth position information, carrying out rated increment distribution on the leaching water quantity in the coverage leaching irrigation strategy to obtain local forced drainage operation parameters of a salt bottom layer accumulation area; And encoding the local forced-drainage operation parameters into local forced-drainage irrigation instructions of the target cultivated land area.
10. A water-saving salinization-control water and fertilizer irrigation system based on wet salt dynamic monitoring, which is characterized by being used for realizing the water-saving salinization-control water and fertilizer irrigation method based on wet salt dynamic monitoring as claimed in claim 1, wherein the system comprises: the dielectric parameter inversion module is used for carrying out dielectric parameter inversion on the target cultivated land area to obtain soil water content data and soil conductivity data of the target cultivated land area; The water-salt profile construction module is used for carrying out multi-layer grid superposition on the soil water content data and the soil conductivity data to construct a water-salt fortune profile of the target cultivated land area so as to identify a salinity surface gathering area and a salinity bottom layer accumulating area of the target cultivated land area; The surface aggregation area regulation and control module is used for analyzing the form concentration of the salinity surface aggregation area, and carrying out water-salt balance allocation on the target cultivated land area based on the analyzed space distribution range and the analyzed salinity concentration to obtain a coverage leaching irrigation strategy of the target cultivated land area; The instruction coding and evolution analysis module is used for coding a coverage leaching irrigation strategy into a drip irrigation regulation and control instruction of a target cultivated land area, and carrying out state evolution analysis on the salt bottom layer accumulation area based on regulated irrigation feedback data to obtain salt peak value change and depth position information of the salt bottom layer accumulation area; And the deep leaching compensation module is used for carrying out deep leaching compensation on the covering leaching irrigation strategy according to the salinity peak value change and the depth position information, so as to generate a local strong irrigation command of the target cultivated land area.

Description

Water-saving salinization-control water and fertilizer irrigation method and system based on wet salt dynamic monitoring Technical Field The invention relates to the technical field of water-saving irrigation, in particular to a water-saving and salt-controlling alkalization water and fertilizer irrigation method and system based on wet salt dynamic monitoring. Background The traditional water and fertilizer irrigation can not invert the soil dielectric parameters in real time, is difficult to accurately acquire the soil water content and conductivity data, cannot construct a complete water-salt fortune profile, and cannot effectively identify a salt surface gathering area and a salt bottom accumulating area. The existing irrigation mode does not combine the spatial distribution characteristics of salt to develop balanced water and salt allocation, and also can not carry out deep leaching correction according to the dynamic evolution of a salt bottom accumulation area, so that the saline-alkali control effect is poor and the water resource utilization rate is low, and therefore, how to improve the accuracy and the operation efficiency of water-saving saline-alkali control water and fertilizer irrigation becomes a problem to be solved urgently. Disclosure of Invention The invention provides a water-saving salinization-control water and fertilizer irrigation method and system based on wet salt dynamic monitoring, which aim to solve the problems in the background technology. In order to achieve the purpose, the water-saving and salt-controlling water and fertilizer irrigation method based on wet salt dynamic monitoring provided by the invention comprises the following steps: Performing dielectric parameter inversion on the target cultivated land area to obtain soil water content data and soil conductivity data of the target cultivated land area; carrying out multi-layer grid superposition on the soil water content data and the soil conductivity data, and constructing a water-salt fortune profile of a target cultivated land area so as to identify a salt surface aggregation area and a salt bottom layer accumulation area of the target cultivated land area; analyzing the morphological concentration of the salinity surface aggregation area, and carrying out water-salt balance allocation on the target cultivated land area based on the analyzed spatial distribution range and the salinity concentration to obtain a coverage leaching irrigation strategy of the target cultivated land area; Coding a coverage leaching irrigation strategy as a drip irrigation regulation and control instruction of a target cultivated land area, and carrying out state evolution analysis on a salt bottom layer accumulation area based on regulated irrigation feedback data to obtain salt peak value change and depth position information of the salt bottom layer accumulation area; And carrying out deep leaching correction on the covering leaching irrigation strategy according to the salinity peak value change and the depth position information, and generating a local strong drainage irrigation instruction of the target cultivated land area. In a preferred embodiment, the performing the dielectric parameter inversion on the target cultivated land area to obtain the soil moisture content data and the soil conductivity data of the target cultivated land area includes: Collecting variable-frequency electromagnetic reflection signals of a target cultivated area, and separating amplitude attenuation data and phase deviation data of the variable-frequency electromagnetic reflection signals; Carrying out spectrum envelope reconstruction on the amplitude attenuation data and the phase shift data to obtain a complex impedance spectrum characteristic curve of the target cultivated land area; Identifying characteristic points of the complex impedance spectrum characteristic curve, and extracting impedance real part data and impedance imaginary part data corresponding to characteristic frequency points in the complex impedance spectrum characteristic curve; And carrying out complex response parameter analysis on the impedance real part data and the impedance imaginary part data to obtain soil moisture content data and soil conductivity data of the target cultivated area. In a preferred embodiment, the multi-layer grid superposition of the soil moisture content data and the soil conductivity data constructs a water salt potential profile of the target cultivated land area, comprising: dividing a target cultivated area into a plane grid according to a preset spatial resolution; Based on the geographical position of the soil water content data and the soil conductivity data, carrying out layered data embedding on the planar grid to obtain multi-layer grid data of a target cultivated area; Performing trend surface fitting on the multilayer grid data to obtain a soil moisture content space continuous distribution curved surface and a soil conductivity space continu