CN105334311A - Multi-layer soil water fertilizer migration and transformation parameters testing device and method - Google Patents

Multi-layer soil water fertilizer migration and transformation parameters testing device and method Download PDF

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CN105334311A
CN105334311A CN201510933703.4A CN201510933703A CN105334311A CN 105334311 A CN105334311 A CN 105334311A CN 201510933703 A CN201510933703 A CN 201510933703A CN 105334311 A CN105334311 A CN 105334311A
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soil
water
organic glass
layer
liquid manure
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CN105334311B (en
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邵东国
徐保利
杨霞
陈述
乐志华
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Wuhan University WHU
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials
    • G01N2033/245Earth materials for agricultural purposes

Abstract

The invention relates to a multi-layer soil water fertilizer migration and transformation parameters testing device and a method, which comprises steps: (a) cylindrical organic glass inner and outer columns and layered soil columns are made, plum blossom-shaped holes are distributed on a specify height in organic glass, and soil columns are packed by cylindrical organic glass inner columns, and are divided into plough layers, plowing layers and bottom soil layers; (b) soil water potential sensors, negative pressure water-taking samplers and soil water content measurement instruments are respectively embedded in various soil layers; (c) soil water generates lateral seepage water which is discharged into ring-shaped regions between the cylindrical organic glass inner and outer columns through the plum blossom-shaped holes at the same time during the infiltration process, and is extracted into an external device to assay and analyze. The multi-layer soil water fertilizer migration and transformation parameters testing device and the method are used to explore layered soil water fertilizer infiltration and lateral seepage and transformation process thereof, determines drainage contribution rate of vertical seepage and lateral seepage of the layered soil in various conditions, can be provided with different underground water levels, and develops translocation and transformation of soil water fertilizer on various layers and mutual replenishment relationship of soil water and underground water.

Description

A kind of multi-layer Soil liquid manure Transport And Transformation parameter test device and method
Technical field
The present invention relates to soil liquid manure migration field, specifically a kind of multi-layer Soil liquid manure Transport And Transformation parameter test device and method.
Background technology
Soil water movement and solute transfer are the bases of research field water fertilizer Transport And Transformation and utilization ratio, at present the research of soil water movement and solute transfer is mainly undertaken by field test study on monitoring and the research of indoor set analog monitoring, under monitor on field contributes to understanding actual water management measure, field water fertilizer is moved, but the research method of monitor on field surveys test period length, test condition is difficult to control and reappear, and monitor on field research has regiospecificity, Monitoring Result should not be applied to other regions.
Find according to a large amount of field inspections and experimental study, because the water management measure that paddy rice is special, paddy soil generally has obvious horizontal slice in vertical direction, and the feature of this layering causes the conversion of motion of paddy field moisture and nutrient to have its own singularity.Soil Water and nutrient transfer transform, and do not occur over just Vertical Infiltration and seepage aspect, are also present between each soil layer and soil layer and in the side seepage motion of irrigation canals and ditches simultaneously.But existing method many research homogeneous soil, and all only consider One-dimensional Vertical or the tangential movement of the holard and solute, be difficult to accurately reflect agricultural land soil liquid manure motion conditions, experimental result is applied in field water fertilizer motion study can exist comparatively big error, therefore needs the inventive method more meeting farmland actual conditions.
Summary of the invention
The object of the invention is for solving the problem and providing a kind of multi-layer Soil liquid manure Transport And Transformation parameter test device and method, vertical and the side seepage of stratified soil moisture and nutrient can be studied move, and under the different water levels degree of depth and underground water table combination can be monitored, the motion of moisture between each layer soil and conversion process, water discharge and earth pillar and underground moisture exchange capacity are oozed in metering earth pillar side, sampled by the soil liquid, the Transport And Transformation process of monitoring nutrient between soil layer, between the holard and underground water.
A kind of multi-layer Soil liquid manure Transport And Transformation parameter test device, comprise platform 25, platform 25 sets gradually from the inside to the outside stratified soil post 1, cylindrical organic glass inner prop 2 and cylindrical organic glass column jacket 3, platform 25 is arranged with water supply chamber 13, be provided with a vent port 14 above water supply chamber 13 sidewall, water supply chamber 13 by feed pipe 15 with automatically control water supply and sewage device 16 and be connected;
Be followed successively by substratum 6 in stratified soil post 1 from bottom to up, plow layer 5 and arable layer 4, the soil water potential sensor 7, negative pressure water ampling device 8 and the soil moisture content surveying instrument 9 that are positioned at same level is respectively arranged with in each layer, described soil water potential sensor 7 is connected with soil water potential collector 19 by cable, negative pressure water ampling device 8 is connected with negative pressure taking holard vacuum tank 20 by cable, and soil moisture content surveying instrument 9 is connected with soil moisture collector 21, soil moisture collector 22 respectively by cable;
Cylindrical organic glass inner prop 2 offers plum blossom hole 10, for discharging the lateral leakage water produced in soil moisture infitration process; Platform 25 is evenly arranged porous flange 26, for the exchange of moisture of water supply chamber 13 and soil column 1.
Be positioned at all soil water potential sensors 7 of stratified soil post 1 at same perpendicular, the all negative pressure water ampling devices 8 being positioned at stratified soil post 1, at same perpendicular, are positioned at all soil moisture content surveying instruments 9 of stratified soil post 1 at same perpendicular.
Soil water potential collector 19, soil moisture collector 21, soil moisture collector 22 are integrated in soil data synthetical collection case 18, and soil data synthetical collection case 18 is also connected with terminal.
Be annular region 11 between described cylindrical organic glass inner prop 2 and cylindrical organic glass column jacket 3, the width of annular region 11 is not less than 65mm, arranges drainpipe 12, for export side to percolating water bottom annular region 11.
Water supply chamber 13 side bottom arranges drainpipe 27, drainpipe 27 is arranged valve 28 to control current.
The height of described cylindrical organic glass inner prop 2 is not less than 1184mm, and diameter is not less than 300mm; The height of cylindrical organic glass column jacket 3 is not less than 1100mm, and diameter is not less than 430mm; The height of arable layer 4 is 200-300mm, and the height of the layer 5 that plows is 150-200mm, and the height of substratum 6 is not less than 600mm.
Described plum blossom hole 10 diameter is 3mm, is uniformly distributed on the post jamb of below cylindrical organic glass inner prop 2 top 250mm-750mm height.
Plastic filter screen is arranged in the top of described porous flange 26; Be provided with plastic filter screen between plum blossom hole 10 and soil column, prevent soil particle from being gone out by side seepage water-band.
A kind of multi-layer Soil liquid manure Transport And Transformation parameter test method, comprises the steps:
1, gather each layer soil sample and carry out assay, determine initial every physical and chemical parameter value;
2, the highest and minimum control groundwater level is determined: the highest control groundwater level is not higher than Shen Duan lower end, soil column post jamb side, and minimum control groundwater level experimentally requires to determine;
3, configure soil liquid manure solution simulation rice field at soil column arable layer surface fertilizing, and keep certain water depth, water depth requires to determine according to specific experiment;
4, basis is embedded in every layer of soil moisture content, temperature and flow of water situation in the sensor dynamic monitoring liquid manure solution infiltration process of each layer of soil column, and utilize negative pressure water ampling device according to the sampling frequency of requirement of experiment at each layer water sampling respectively simultaneously, experimentally soil liquid Middle nutrition constituent content is measured in requirement; In conjunction with the soil moisture content observed, the soil moisture and soil water potential are analyzed, and probe into the change of corresponding content and the distribution situation in soil thereof in liquid manure infitration process; The process of further research soil moisture and nutrient Transport And Transformation between the layers;
In the process of 5, oozing under soil liquid manure solution, can ooze in the plum blossom hole formation side of cylindrical organic glass inner prop sidewall, the lateral seepage inside and outside organic glass between post annular region is collected according to the drainpipe of the outer column bottom of described cylindrical organic glass, carry out weighing chemical examination, probe into the proportion that continuous lateral seepage is shared in the process of liquid manure solution seepage, and analyze the Transport And Transformation of liquid manure Changing Pattern and each factor in the infiltrate journey of continuous side;
6, analyze the change procedure of the groundwater level in soil liquid manure solution infitration process according to the output of day part and water discharge that automatically control water supply and sewage device monitoring, analyze the impact on groundwater level; Collect the water sample of described organic glass inner prop bottom water supply chamber, carry out assay, analyze and discharge constituent and content in water, probe into the vertical filter loss amount of liquid manure in soil; By for the independent observation process of soil lateral seepage water with vertical lower infiltration, analyzing the two-dimensional characteristics of soil liquid manure seepage, probe into various control Soil Under Conditions liquid manure transportion and transformation, providing theoretical foundation and technical support for improving liquid manure utilization ratio.
The advantage of a kind of multi-layer Soil liquid manure of the present invention Transport And Transformation parameter test device and method is:
1, the present invention is conceived to moisture and the nutrient transfer conversion process of stratified soil, but not the existing research method for homogeneous soil, make the test condition of existing research method more meet farmland actual conditions.Arrange soil water potential sensor, negative pressure water ampling device and soil moisture content surveying instrument at each soil layer, simultaneously measuring tempeature, the test analysis for stratified soil moisture and nutrient motion and conversion process relevant parameter can be realized.
2, by laying plum blossom hole on organic glass inner prop, soil column can form side seepage in process of the test, the seepage flow water yield is collected in annular region, then chemically examines the nutrient situation of wandering water, the monitoring of side seepage and nutrient discharge when oozing under can realizing soil column moisture.
3, the test process involved by this invention controls the realization of water supply and sewage device automatically by connecting a underground water table, utilize this device can the water quality exchanges of quantitative examination soil column soil moisture and water supply chamber underground water, in conjunction with, and then realize the independent test of the different whereabouts of soil column draining, and the test of the different loss approach of nutrient.
4, by arranging different water layers and underground water table, can the Transport And Transformation of soil moisture nutrient under the different controlled condition of the Study of the Realization, the different situation of further understanding arranges the motion of lower field water fertilizer, for monitoring, raising field water fertilizer utilization ratio provide theory support more fully.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of apparatus of the present invention.
Fig. 2 is the partial structurtes schematic diagram of apparatus of the present invention.
Fig. 3 is the floor plan of apparatus of the present invention.
Fig. 4 is the structural representation of plum blossom hole.
In figure, 1 is stratified soil post, 2 is cylindrical organic glass inner prop, 3 is cylindrical organic glass column jacket, 4 is arable layer, 5 is the layer that plows, 6 is substratum, 7 is soil water potential sensor, 8 is negative pressure water ampling device, 9 is soil moisture content surveying instrument, 10 is plum blossom hole, 11 is annular region, 12 is drainpipe, 13 is water supply chamber, 14 is vent port, 15 is feed pipe, 16 is automatically control water supply and sewage device, 17 is valve, 18 is soil data synthetical collection case, 19 is soil water potential collector, 20 is negative pressure taking holard vacuum tank, 21 is soil moisture collector, 22 is soil moisture collector, 23 is flange bolt, 24 is inner prop flange, 25 is platform, 26 is porous flange, 27 is drainpipe, 28 is valve.
Embodiment
embodiment one
Below in conjunction with Figure of description, the present invention is further described.As Figure 1-4, a kind of multi-layer Soil liquid manure Transport And Transformation parameter test device, comprise platform 25, platform 25 sets gradually from the inside to the outside stratified soil post 1, cylindrical organic glass inner prop 2 and cylindrical organic glass column jacket 3, platform 25 is arranged with water supply chamber 13, be provided with a vent port 14 above water supply chamber 13 sidewall, water supply chamber 13 by feed pipe 15 with automatically control water supply and sewage device 16 and be connected;
Be followed successively by substratum 6 in stratified soil post 1 from bottom to up, plow layer 5 and arable layer 4, the soil water potential sensor 7, negative pressure water ampling device 8 and the soil moisture content surveying instrument 9 that are positioned at same level is respectively arranged with in each layer, described soil water potential sensor 7 is connected with soil water potential collector 19 by cable, negative pressure water ampling device 8 is connected with negative pressure taking holard vacuum tank 20 by cable, and soil moisture content surveying instrument 9 is connected with soil moisture collector 21, soil moisture collector 22 respectively by cable;
Cylindrical organic glass inner prop 2 offers plum blossom hole 10, for discharging the lateral leakage water produced in soil moisture infitration process.
Be positioned at all soil water potential sensors 7 of stratified soil post 1 at same perpendicular, the all negative pressure water ampling devices 8 being positioned at stratified soil post 1, at same perpendicular, are positioned at all soil moisture content surveying instruments 9 of stratified soil post 1 at same perpendicular.
Soil water potential collector 19, soil moisture collector 21, soil moisture collector 22 are integrated in soil data synthetical collection case 18, soil data synthetical collection case 18 is also connected with terminal, and the dynamic testing process of observed parameter also reads corresponding dynamic changing data.
Be annular region 11 between described cylindrical organic glass inner prop 2 and cylindrical organic glass column jacket 3, drainpipe 12 is set bottom annular region 11, for export side to percolating water.
Water supply chamber 13 side bottom arranges drainpipe 27, drainpipe 27 is arranged valve 28 to control current.
The height of described arable layer 4 is 200mm, and the height of the layer 5 that plows is 200mm, and the height of substratum 6 is 600mm.Whole soil column height is between 950-1050mm.The height of soil column can be adjusted according to the thickness of the substratum of specific experiment requirement.The diameter of described cylindrical organic glass inner prop 2 is 300mm, is highly 1184mm; The diameter of cylindrical organic glass column jacket 3 is 430mm, is highly 1100mm.
Described plum blossom hole 10 diameter is 3mm, is uniformly distributed on the post jamb of below cylindrical organic glass inner prop 2 top 250mm-750mm height.
Platform bottom described cylindrical organic glass inner prop 2 is evenly covered with porous flange 26, and plastic filter screen is arranged in the top of porous flange 26; Be provided with plastic filter screen between plum blossom hole 10 and soil column, prevent soil particle from being gone out by side seepage water-band.
Automatic control water supply and sewage device 16 is existing patent, and application number is 2005200993186, and the applying date is on Dec 12nd, 2005.
The inventive method, comprises the steps:
(1) apparatus of the present invention are made:
A () makes stratified soil earth pillar 1, cylindrical organic glass inner prop 2, cylindrical organic glass column jacket 3, organic glass inner prop specified altitude assignment is dispersed with the plum blossom-shaped hole 10 shown in Fig. 4, in order to discharge the lateral leakage water produced in soil moisture infitration process, between plum blossom hole and earth pillar, plastic filter screen is set, prevent soil particle from being gone out by side seepage water-band, its thickness is determined according to requirement of experiment, organic glass inner prop is fixed on platform 25 by flange bolt 23 and inner prop flange 24, the platform of its underpart evenly arranges porous flange 26, and lay plastic filter screen thereon, the thickness of plastic filter screen experimentally requires to determine,
(b) soil earth pillar wrapped up by inner prop and be divided into arable layer 4 according to rice field undisturbed soil feature, the layer 5 that plows, substratum 6, each layer thickness is respectively 200mm, 200mm, 600mm, according to after designing requirement back-filling in layers and compacting;
Soil water potential sensor 7, negative pressure water ampling device 8 and soil moisture content surveying instrument 9(measuring tempeature is simultaneously buried respectively underground) in (c) each soil layer, require that the every one deck of instrument is on same surface level, each arranges identical instrument on same sectional elevation.Soil layer inner sensor utilizes respective cable to be connected to soil water potential collector 19, negative pressure taking holard vacuum tank 20, soil moisture collector 21, soil moisture collector 22 respectively by column jacket preformed hole in organic glass, wherein, soil water potential collector 19, soil moisture collector 21, soil moisture collector 22 are integrated in soil data synthetical collection case 18; Dynamic acquisition supplemental characteristic transfers to main control computer, and described soil data synthetical collection case 18 is of a size of 360mm × 200mm.In organic glass, the every one deck of column jacket preformed hole has three to be evenly distributed on same surface level, wherein, the preformed hole of organic glass inner prop and organic glass column jacket in sustained height position, from upper strata to lower floor distance glass column top distance be 250mm respectively, 425mm, 600mm;
(d) by plum blossom hole 10 discharge side to wandering water to interior column jacket between annular region 11, a drainpipe 12 is set bottom annular region, is discharged to the outside by drainpipe and carries out assay after collecting;
E () organic glass inner prop low mounting height is that the water supply chamber 13 of 84mm in order to supply water and the draining accepted in the vertical infitration process of earth pillar moisture in earth pillar, and vent port 14 is provided with above water supply chamber 13 sidewall, water supply chamber connects control water supply and sewage device 16 automatically by feed pipe 15, feed pipe is arranged valve 17 and control water flow situation, and collect draining by drainpipe 27, valve 28 is set simultaneously and controls draining current.
(2) experiment first gathers each layer soil sample and carries out assay before starting, and determines initial every physical and chemical parameter value.
(3) the highest and minimum control groundwater level is determined.The highest control groundwater level is not higher than Shen Duan lower end, earth pillar post jamb side, and minimum control groundwater level experimentally requires to determine.
(4) configure the soil liquid manure solution simulation rice field of certain proportion concentration at earth pillar arable layer surface fertilizing, and keep certain water depth, water depth requires to determine according to specific experiment.Different water depths represents different irrigation methods, can to liquid manure in multi-layer Soil Transport And Transformation have an impact.
(5) every layer of soil moisture content, temperature and flow of water situation in the sensor dynamic monitoring liquid manure solution infiltration process of each layer of earth pillar is embedded in described in basis, and utilize negative pressure device according to the sampling frequency of requirement of experiment at each layer water sampling respectively simultaneously, experimentally soil liquid Middle nutrition constituent content is measured in requirement.In conjunction with the soil moisture content observed, the soil moisture and soil water potential are analyzed, and probe into the change of corresponding content and the distribution etc. in soil thereof in liquid manure infitration process.The process of further research soil moisture and nutrient Transport And Transformation between the layers.
(6) according in described process of oozing under soil liquid manure solution, situation can be oozed in the plum blossom hole formation side of organic glass inner prop sidewall, the lateral seepage inside and outside organic glass between post annular region is collected according to the drainpipe of the outer column bottom of described organic glass, carry out weighing chemical examination, probe into the proportion that continuous lateral seepage is shared in the process of liquid manure solution seepage, and analyze the Transport And Transformation of liquid manure Changing Pattern and each factor in the infiltrate journey of continuous side.
(7) output of the day part of monitoring according to described automatic control drainage device and water discharge analyze the change procedure of the groundwater level in soil liquid manure solution infitration process, analyze the impact on groundwater level.Collect the water sample of described organic glass inner prop bottom water supply chamber, carry out assay, analyze and discharge constituent and content in water, probe into the vertical filter loss amount of liquid manure in soil.By for the independent observation process of soil lateral seepage water with vertical lower infiltration, analyzing the two-dimensional characteristics of soil liquid manure seepage, probe into various control Soil Under Conditions liquid manure transportion and transformation, providing theoretical foundation and technical support for improving liquid manure utilization ratio.
embodiment two
Based on the apparatus and method step of embodiment one, the enforcement of following experiment can be realized:
As Fig. 1-4, in described organic glass, column jacket, soil earth pillar arrange 4 simultaneously and are connected to same automatic control water supply and sewage device, and its soil layer situation, embedded instrument situation, to gather collection situation all identical.Simulate face, actual field crop-planting situation respectively at the arable layer long-term cropping of 4 devices.Two kinds of irrigation methods and F1 and F2 are set, two kinds of groundwater level level of control Z1 and Z2 are set.Test arranges 4 processing horizontals altogether: F1Z1, F1Z2, F2Z1, F2Z2, according to Crop growing stage determination irrigation program.Gather each layer pedotheque before crop-planting, measure its corresponding physical and chemical parameter.
Described earth pillar water depth should not be greater than the maximum flooding depth of crop.
The groundwater level of described device is determined according to respective requirement of experiment.Wherein, the highest controlling water level should not arrange accumulated water position higher than crop, can determine according to farmland prevention against water-logging standard; Experimentally require to determine minimum controlling water level.
Identical Fertilization Level is set.Regularly obtain soil water sample by described each layer negative pressure sampling apparatus, carry out assay; Describedly be embedded in the soil moisture sensor of each layer of soil and the change procedure of soil water potential sensor Real-Time Monitoring soil moisture, temperature and the flow of water.In the different growing of crop, gather crop sample respectively, measure the content of its crop endotrophic element.
Collect the side seepage water of post annular region inside and outside described organic glass and carry out weighing chemical examination.Read the corresponding output of described automatic control water supply and sewage device and water discharge data.
Experimentally data, analysis irrigation method and underground water table control the effect to liquid manure motion, the Transport And Transformation of research crop-holard-underground water liquid manure, to improve crop to liquid manure absorption efficiency with reduce liquid manure filter loss for target, determine rational irrigation method and Groundwater Control horizontal combination.

Claims (9)

1. a multi-layer Soil liquid manure Transport And Transformation parameter test device, it is characterized in that: comprise platform (25), platform (25) sets gradually from the inside to the outside stratified soil post (1), cylindrical organic glass inner prop (2) and cylindrical organic glass column jacket (3), platform (25) is arranged with water supply chamber (13), be provided with a vent port (14) above water supply chamber (13) sidewall, water supply chamber (13) by feed pipe (15) with automatically control water supply and sewage device (16) and be connected;
Substratum (6) is followed successively by from bottom to up in stratified soil post (1), to plow layer (5) and arable layer (4), the soil water potential sensor (7) being positioned at same level is respectively arranged with in each layer, negative pressure water ampling device (8) and soil moisture content surveying instrument (9), described soil water potential sensor (7) is connected with soil water potential collector (19) by cable, negative pressure water ampling device (8) is connected with negative pressure taking holard vacuum tank (20) by cable, soil moisture content surveying instrument (9) by cable respectively with soil moisture collector (21), soil moisture collector (22) is connected,
Cylindrical organic glass inner prop (2) offers plum blossom hole (10), for discharging the lateral leakage water produced in soil moisture infitration process; Platform (25) is evenly arranged porous flange (26), for the exchange of moisture of water supply chamber (13) and soil column (1).
2. proving installation as claimed in claim 1, it is characterized in that: be positioned at all soil water potential sensors (7) of stratified soil post (1) at same perpendicular, the all negative pressure water ampling devices (8) being positioned at stratified soil post (1), at same perpendicular, are positioned at all soil moisture content surveying instruments (9) of stratified soil post (1) at same perpendicular.
3. proving installation as claimed in claim 1, it is characterized in that: soil water potential collector (19), soil moisture collector (21), soil moisture collector (22) are integrated in soil data synthetical collection case (18), and soil data synthetical collection case (18) is also connected with terminal.
4. proving installation as claimed in claim 1, it is characterized in that: be annular region (11) between described cylindrical organic glass inner prop (2) and cylindrical organic glass column jacket (3), the width of annular region (11) is not less than 65mm, annular region (11) bottom arranges drainpipe (12), for export side to percolating water.
5. proving installation as claimed in claim 1, is characterized in that: water supply chamber (13) side bottom arranges drainpipe (27), drainpipe (27) is arranged valve (28) to control current.
6. proving installation as claimed in claim 1, is characterized in that: the height of described cylindrical organic glass inner prop (2) is not less than 1184mm, and diameter is not less than 300mm; The height of cylindrical organic glass column jacket (3) is not less than 1100mm, and diameter is not less than 430mm; The height of arable layer (4) is 200-300mm, and the height of the layer that plows (5) is 150-200mm, and the height of substratum (6) is not less than 600mm.
7. proving installation as claimed in claim 1, is characterized in that: described plum blossom hole (10) diameter is 3mm, is uniformly distributed on the post jamb of below cylindrical organic glass inner prop (2) top 250mm-750mm height.
8. proving installation as claimed in claim 1, is characterized in that: plastic filter screen is arranged in the top of described porous flange (26); Be provided with plastic filter screen between plum blossom hole (10) and soil column, prevent soil particle from being gone out by side seepage water-band.
9. utilize the method for testing of proving installation as described in claim 1-8, it is characterized in that comprising the steps:
(1) gather each layer soil sample and carry out assay, determine initial every physical and chemical parameter value;
(2) the highest and minimum control groundwater level is determined: the highest control groundwater level is not higher than Shen Duan lower end, soil column post jamb side, and minimum control groundwater level experimentally requires to determine;
(3) configure soil liquid manure solution simulation rice field at soil column arable layer surface fertilizing, and keep certain water depth, water depth requires to determine according to specific experiment;
(4) basis is embedded in every layer of soil moisture content, temperature and flow of water situation in the sensor dynamic monitoring liquid manure solution infiltration process of each layer of soil column, and utilize negative pressure water ampling device according to the sampling frequency of requirement of experiment at each layer water sampling respectively simultaneously, experimentally soil liquid Middle nutrition constituent content is measured in requirement; In conjunction with the soil moisture content observed, the soil moisture and soil water potential are analyzed, and probe into the change of corresponding content and the distribution situation in soil thereof in liquid manure infitration process; The process of further research soil moisture and nutrient Transport And Transformation between the layers;
(5) in the process of oozing under soil liquid manure solution, can ooze in the plum blossom hole formation side of cylindrical organic glass inner prop sidewall, the lateral seepage inside and outside organic glass between post annular region is collected according to the drainpipe of the outer column bottom of described cylindrical organic glass, carry out weighing chemical examination, probe into the proportion that continuous lateral seepage is shared in the process of liquid manure solution seepage, and analyze the Transport And Transformation of liquid manure Changing Pattern and each factor in the infiltrate journey of continuous side;
(6) analyze the change procedure of the groundwater level in soil liquid manure solution infitration process according to the output of day part and water discharge that automatically control water supply and sewage device monitoring, analyze the impact on groundwater level; Collect the water sample of described organic glass inner prop bottom water supply chamber, carry out assay, analyze and discharge constituent and content in water, probe into the vertical filter loss amount of liquid manure in soil; By for the independent observation process of soil lateral seepage water with vertical lower infiltration, analyze the two-dimensional characteristics of soil liquid manure seepage, probe into various control Soil Under Conditions liquid manure transportion and transformation.
CN201510933703.4A 2015-12-15 2015-12-15 A kind of multi-layer Soil liquid manure Transport And Transformation parameter test device and method Expired - Fee Related CN105334311B (en)

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