A saline-alkali land greening test system and method

Abstract

The application discloses a kind of saline-alkali soil greening test system and method, it is related to saline-alkali soil greening field, including each test field that is mutually physically isolated, each described test field includes halophyte measure test field, agricultural tillage measure test field, chemical measure test field, physical isolation measure test field and water power measure test field, wherein the distance of described chemical measure test field and other described test field is not less than ten meters.The saline-alkali soil greening test system and method provided by the application, by dividing multiple test fields, on the basis of multiple saline-alkali soil restoration measures, record the growth survival data of seedling, can be carried out evaluation test to saline-alkali seedling planting, induction seedling growth in different test field, and find out problems in process and solve problems, summarize and improve seedling survival rate optimal item, optimize later greening engineering design and construction, avoid large-scale seedling death.

Description

Technical Field

[0001] This invention relates to the field of saline-alkali land greening, and more particularly to a saline-alkali land greening experimental system and method. Background Technology

[0002] The survival rate of greening seedlings is determined by internal and external factors. Internal factors mainly include the age and vitality of the seedlings themselves, their own pests and diseases, damage during transportation, the size of the tree ball, whether the pruning of the seedling branches and leaves is suitable, and whether they are temporary seedlings. External factors mainly include whether they are planted out of season, whether the temperature is suitable, whether the soil pH, salinity, organic matter, texture and infiltration rate are suitable, whether the drainage of the tree pit is smooth, and whether the thickness of the planting soil meets the standard requirements.

[0003] Compared with other projects, the low survival rate of seedlings in saline-alkali land is mainly due to the soil's alkaline pH, high salt content, low organic matter, saline-alkali texture, low infiltration rate, severe water accumulation, and poor drainage in the tree pits. In summary, the soil does not meet the specifications for planting soil. Currently, there are no relevant specifications or guidelines for greening planting in saline-alkali tidal flats. Therefore, we propose a greening experimental system and method for saline-alkali land to summarize the optimal measures to improve the survival rate of seedlings. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a saline-alkali land greening experimental system and method. By dividing the land into multiple experimental plots and recording the growth and survival data of seedlings based on multiple saline-alkali land restoration measures, the system can conduct evaluation experiments on the planting of saline-alkali seedlings and summarize the optimal methods for improving seedling survival rates.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] In a first aspect, the present invention provides a saline-alkali land greening experimental system, comprising various experimental plots that are physically isolated from each other. Each of the experimental plots includes a halophyte measures experimental plot, an agricultural cultivation measures experimental plot, a chemical measures experimental plot, a physical isolation measures experimental plot, and a hydraulic measures experimental plot, wherein the distance between the chemical measures experimental plot and the other experimental plots is not less than ten meters.

[0007] The experimental site for halophyte measures was surrounded by a 120mm thick brick masonry wall, covered with a 20mm thick 1:2 cement mortar. The foundation under the brick masonry wall consisted of a 150mm thick C20 concrete wall and a 150mm thick layer of graded crushed stone. Inside the experimental site, from bottom to top, were placed a 300mm thick layer of graded crushed stone, two layers of geotextile, a 1000mm thick layer of 4% semi-decomposed corn stalk loess replacement layer, a 50mm thick layer of salt-washing and salt-suppressing reeds, and a 4% semi-decomposed corn stalk loess replacement layer.

[0008] The experimental site for agricultural tillage measures was surrounded by a 120mm thick brick masonry wall, covered with a 20mm thick 1:2 cement mortar. The foundation under the brick masonry wall consisted of a 150mm thick C20 concrete wall and a 150mm thick layer of graded crushed stone. Inside the experimental site, from bottom to top, the site was filled with on-site soil, a 1000mm thick layer of 4% semi-decomposed corn stalk loess, a 50mm thick layer of salt-washing and salt-suppressing reeds, and another 4% semi-decomposed corn stalk loess.

[0009] The chemical measures test site is surrounded by a 120mm thick brick masonry, with a 20mm thick 1:2 cement mortar plaster. The foundation under the brick masonry is a 150mm thick C20 concrete and a 150mm thick graded crushed stone. Inside the test site, from bottom to top, there is on-site soil, a 50mm thick layer of salt-washing and salt-suppressing reeds, and chemical amendments.

[0010] The physical isolation test site was surrounded by a 120mm thick brick masonry wall, plastered with a 20mm thick 1:2 cement mortar. The foundation beneath the brick masonry consisted of a 150mm thick C20 concrete layer and a 150mm thick layer of graded crushed stone. Within the test site, compacted soil was placed from bottom to top. The structure includes a leaking pipe, a 150mm thick C20 concrete foundation and a 150mm thick C20 pipe wrapping, a 100mm thick C20 concrete reinforcing steel, graded pebbles, a 4% semi-decomposed corn stalk loess covering, a 50mm thick salt-washing and salt-suppressing reed, and a surface layer of 4% semi-decomposed corn stalk loess.

[0011] The hydraulic test site was surrounded by a 120mm thick brick masonry wall, plastered with a 20mm thick 1:2 cement mortar. The foundation beneath the brick masonry consisted of a 150mm thick C20 concrete layer and a 150mm thick layer of graded crushed stone. Within the test site, soil was placed from bottom to top... Leaking pipes, on-site soil, Drip irrigation, on-site soil.

[0012] Preferably, each of the experimental sites is provided with a greening layer. The upper trees of the greening layer include Malus spectabilis, Pinus thunbergii, Syringa vulgaris, Koelreuteria paniculata, and Prunus persica. The lower trees of the greening layer include Bermuda grass, Nandina domestica, Weigela florida, Buxus macrocarpa, Juniperus chinensis, Ligustrum lucidum, Pittosporum tobira, Iris tectorum, Zephyranthes candida, and Alfalfa. The varieties and specifications of the greening seedlings can be determined in the preliminary design drawings. Big data analysis of the coastal greening seedling list shows that Malus spectabilis, Pinus thunbergii, Syringa vulgaris, Koelreuteria paniculata, and Prunus persica, and the lower trees such as Bermuda grass, Nandina domestica, Weigela florida, Buxus macrocarpa, Juniperus chinensis, Ligustrum lucidum, Pittosporum tobira, Iris tectorum, and Zephyranthes candida have a low frequency of use. Seedlings with lower usage have a lower survival rate and are the focus of this experimental study.

[0013] Preferably, the test system further includes wind power generation equipment for generating wind power at each of the test sites. The wind power generation equipment consists of nylon fiber blades, a die-cast aluminum fairing, a 50mm thick 304 stainless steel base, and a die-cast aluminum body. The generated current is transmitted to the wind power generation controller via a three-phase AC power supply (positive, negative, and grounding wire) and stored in a smart battery. The solar energy equipment has a 1.12*0.67mm solar panel with 12V 120W power. The current is transmitted to the solar charger via a two-phase AC power supply (positive and negative) and then to the smart battery via the positive and negative terminals of the storage battery. The storage battery wirelessly transmits the power consumption data to the control computer and then delivers the power to the equipment via a SYWV cable and a PVC sheath.

[0014] Preferably, the testing system further includes intelligent manufacturing equipment for detecting each of the test sites. The intelligent manufacturing equipment includes a spherical all-day camera, an environmental sensor, a soil sensor, and a patrol system. For power supply, a battery delivers power to the equipment via a SYWV cable and a PVC sheath. All equipment is wirelessly connected to a control computer. The spherical all-day camera and the comprehensive soil sensor provide functions for soil nitrogen, soil potassium, soil conductivity, soil phosphorus, soil moisture, soil temperature, and soil pH. The patrol system includes patrol points, a patrol wand, an intelligent communication base, and a communication cable. The environmental sensor provides functions for outdoor humidity, rainfall, outdoor temperature, wind speed, atmospheric pressure, and wind direction.

[0015] Preferably, the 4% semi-decomposed corn stalk loess covering the surface layer of the experimental agricultural tillage measures is replaced and turned over 4 times a year.

[0016] Preferably, the chemical amendment is selected from one or more of desulfurized gypsum, sulfate, organic or inorganic fertilizer, furfural residue, and comprehensive soil conditioner.

[0017] Preferably, the dimensions of each of the test sites are 5 x 5 m.

[0018] Secondly, the present invention also provides a method for greening saline-alkali land, which uses various test sites in the test system described in any of the technical solutions in the first aspect to conduct comparative tests.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The saline-alkali land greening test system and method provided by the present invention, by dividing multiple test sites and recording the growth and survival data of seedlings based on multiple saline-alkali land restoration measures, can conduct evaluation tests on the planting of saline-alkali seedlings and summarize the optimal measures to improve the survival rate of seedlings.

[0020] This invention is highly targeted. Within the experimental site, it simulates the unique conditions of this project and uses scientific techniques and methods to evaluate which scheme can guarantee the survival rate of seedlings. It has significant reference value for this project and other projects with similar conditions.

[0021] The invention enables the reuse of equipment and materials, keeping the tree balls of seedlings intact for secondary use in subsequent greening projects; the secondary use of new energy equipment can be used for security measures at project sites or construction sites; and the intelligent manufacturing equipment can be temporarily placed at the project site for secondary use.

[0022] This invention is a systematic and modular system with complete functions, easy procurement, reliable system, simple construction, simple maintenance, and comprehensive data collection. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a plan view of the civil engineering and greening layout of the present invention;

[0025] Figure 2 This is a cross-sectional view of the experimental site for the halophyte control and agricultural operation measures of this invention;

[0026] Figure 3 These are cross-sectional views of the chemical measures, physical isolation measures, and hydraulic engineering measures of this invention;

[0027] Figure 4 This is a plan view of the tree arrangement for the saline-alkali land greening experiment of this invention;

[0028] Figure 5 This is a plan view of the underground timber layout for the saline-alkali land greening experiment of this invention;

[0029] Figure 6 This is a schematic diagram of the new energy system of the present invention;

[0030] Figure 7 This is a schematic diagram of the intelligent manufacturing equipment system of the present invention;

[0031] Figure 8 This is an elevation view of the intelligent manufacturing equipment of the present invention.

[0032] In the diagram: 1-120mm thick brick masonry, 2-20mm thick 1:2 cement mortar (1% waterproofing agent) plaster, 3-150mm thick C20 concrete foundation under the brick masonry, 4-150mm thick graded crushed stone, 5-1000mm thick 4% semi-decomposed corn stalk loess replacement, 6-50mm thick salt-washing and salt-suppressing reeds, 7-2 layers of geotextile, 8-300mm thick graded crushed stone, 9-site soil, 10-soil conditioner, 11-100mm thick C20 concrete reinforcement ( Bidirectional), 12-grade pebbles, Leakage pipe, 14- Drip irrigation, 15-Malus spectabilis, 16-Pinus thunbergii, 17-Syringa vulgaris, 18-Koelreuteria paniculata, 19-Prunus persica, 20-Dwarf Bermuda grass, 21-Nandina domestica, 22-Weigela florida, 23-Buxus macrocarpa, 24-Juniperus chinensis, 25-Ligustrum japonicum, 26-Pittosporum tobira, 27-Iris tectorum, 28-Zephyranthes candida, 29-Alfalfa, 30-Nylon fiber blades, 31-Die-cast aluminum fairing, 32-50mm thick 304 stainless steel base, 33-Die-cast aluminum body, 34-Three-phase AC power supply, positive, negative, grounding wire, 35-Wind power controller, 36-Intelligent battery storage, 37-Solar equipment 1.12*0.67 solar panel 12V 120W, 38-Two-phase AC power supply, positive + negative, 39- Solar charger, 40-Battery positive connection, 41-Battery negative connection, 42-Control computer, 43-SYWV cable, PVC sheath, 44-Spherical all-day camera, 45-Soil integrated sensor, 46-Soil nitrogen, 47-Soil potassium, 48-Soil conductivity, 49-Soil phosphorus, 50-Soil moisture, 51-Soil temperature, 52-Soil pH value, 53-Patrol system, 54-Functions including patrol points, 55-Patrol wand, 56-Smart communication base, 57-Communication cable, 58-Environmental sensor, 59-Functions including outdoor humidity, 60-Rainfall, 61-Outdoor temperature, 62-Wind speed, 63-Atmospheric pressure, 64-Wind direction, 65-Equipment box, 66-Equipment pole, 67-Control computer, 68-Equipment box. Detailed Implementation

[0033] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0034] Example 1

[0035] Reference Figure 1-8 This embodiment provides a saline-alkali land greening experimental system, including various experimental plots that are physically isolated from each other. Each experimental plot includes a halophyte control experimental plot, an agricultural cultivation control experimental plot, a chemical control experimental plot, a physical isolation control experimental plot, and a hydraulic control experimental plot, wherein the distance between the chemical control experimental plot and other experimental plots is ten meters.

[0036] The experimental site for halophyte measures was surrounded by a 120mm thick brick masonry wall, with a 20mm thick 1:2 cement mortar plaster on the outside. The foundation under the brick masonry wall consisted of a 150mm thick C20 concrete wall and a 150mm thick layer of graded crushed stone. Inside the experimental site, from bottom to top, there was a 300mm thick layer of graded crushed stone, two layers of geotextile, a 1000mm thick layer of 4% semi-decomposed corn stalk loess replacement layer, a 50mm thick layer of salt-washing and salt-suppressing reeds, and a 4% semi-decomposed corn stalk loess replacement layer.

[0037] The experimental site for agricultural tillage measures was surrounded by a 120mm thick brick masonry wall, with a 20mm thick 1:2 cement mortar plaster on the outside. The foundation under the brick masonry wall was a 150mm thick C20 concrete and a 150mm thick graded crushed stone. Inside the experimental site, from bottom to top, the site soil was replaced by a 1000mm thick layer of 4% semi-decomposed corn stalk loess, a 50mm thick layer of salt-washing and salt-suppressing reeds, and another 4% semi-decomposed corn stalk loess.

[0038] The chemical treatment test site was surrounded by a 120mm thick brick masonry, with a 20mm thick 1:2 cement mortar plaster on the outside. The foundation under the brick masonry was a 150mm thick C20 concrete and a 150mm thick graded crushed stone. Inside the test site, from bottom to top, there was on-site soil, a 50mm thick layer of salt-washing and salt-suppressing reeds, and chemical amendments.

[0039] The physical isolation test site was surrounded by a 120mm thick brick masonry wall, plastered with a 20mm thick 1:2 cement mortar. The foundation beneath the brick masonry consisted of a 150mm thick C20 concrete layer and a 150mm thick layer of graded crushed stone. Within the test site, compacted soil was placed from bottom to top. The structure includes a leaking pipe, a 150mm thick C20 concrete foundation and a 150mm thick C20 pipe wrapping, a 100mm thick C20 concrete reinforcing steel, graded pebbles, a 4% semi-decomposed corn stalk loess covering, a 50mm thick salt-washing and salt-suppressing reed, and a surface layer of 4% semi-decomposed corn stalk loess.

[0040] The hydraulic test site was surrounded by a 120mm thick brick masonry wall, plastered with a 20mm thick 1:2 cement mortar. The foundation beneath the brick masonry consisted of a 150mm thick C20 concrete layer and a 150mm thick layer of graded crushed stone. Inside the test site, from bottom to top, on-site soil was placed... Leaking pipes, on-site soil, Drip irrigation, on-site soil.

[0041] In terms of civil engineering and landscaping, the experimental site was divided into earthwork and water conservancy projects, agricultural cultivation, halophyte testing, chemical amendment testing, and physical isolation measures. The chemical amendment testing area involved the addition of chemicals, which could affect other testing areas. There were five testing areas, each a 5x5 meter square with a net square width of 4.68 meters. The chemical amendment area was 10 meters away from other testing areas. Detailed civil engineering practices are shown in the table below. For landscaping, the upper trees used were Malus spectabilis, Pinus tabuliformis, Syringa vulgaris, Koelreuteria paniculata, and Prunus persica. Except for the halophyte testing area, the understory of the other four areas used dwarf Bermuda grass seeds, Nandina domestica, Weigela florida, Buxus macrocarpa, Juniperus chinensis, Ligustrum japonicum, Pittosporum tobira, Iris tectorum, and Zephyranthes candida. The understory of the halophyte testing area used alfalfa. (See attached table.) Figure 6 Table 1.

[0042] Regarding the big data engineering, the varieties and specifications of the greening seedlings have been determined in the preliminary design drawings. Big data analysis of the greening seedling inventory of Binhai Port over the past 10 years revealed that a total of 22 varieties of seedlings will be used in this project, of which 15 varieties have low usage frequency. Following big data analysis and on-site surveys of surrounding greening projects, the conclusion was that varieties with high usage frequency have high survival rates, while varieties with lower usage frequency have lower survival rates. This experiment focuses on studying the 15 varieties and specifications of seedlings with low usage frequency, as shown in Table 2 below.

[0043] In terms of new energy projects, all three types of equipment operate at 12V, and the power output is also 12V. For solar power generation, 90 degrees is the optimal angle. Winter is the period with the lowest solar power generation. In Yancheng, the maximum solar radiation angle at the winter and summer solstices is 33 degrees. We adjusted the angle of the south-facing solar panels to 57 degrees. The safe wind speed for wind power generation is 55 meters per second. When the wind speed exceeds this value, the blades are locked, but the wind turbine continues to operate normally to prevent damage. See Table 3 below.

[0044] In terms of intelligent manufacturing equipment, the main components include environmental sensors, soil sensors, spherical infrared cameras, and patrol systems. The first three types of equipment operate at 12V, and their batteries can provide continuous power for 49 hours on a full charge. The wiring uses SYWV polyethylene physical foam insulation and a PVC sheath; the national standard designation is RF cable. The spherical infrared camera's recordings are stored on the control computer, which is powered by a 10TB solid-state drive. Other parameters are shown in Table 4 below.

[0045] In terms of information technology engineering, at the computer control end, designated personnel monitor and record equipment usage at 6:00, 9:00, 11:00, 14:00, 17:00, 21:00, 24:00, and 3:00. At patrol points, designated personnel are required to conduct daily on-site inspections at 9:30 and 17:30, using a patrol wrench. The main information technology tasks include monitoring equipment operation, calculating power generation, power consumption, battery power consumption, environmental sensor data, soil sensor data, and checking cameras and patrol points. See Table 5 below.

[0046]

[0047]

[0048] Table 1 Detailed Construction Practices for Civil Engineering

[0049]

[0050] Table 2 Seedling Big Data Project

[0051]

[0052]

[0053] Table 3 New Energy Projects

[0054] Table 4 Intelligent Manufacturing Equipment Engineering

[0055]

[0056] Table 5 Information Technology Engineering

[0057] The experimental system in this embodiment includes civil engineering and landscaping, big data, new energy, intelligent manufacturing equipment, and information technology. The experiment achieved energy conservation and emission reduction, utilizing wind and solar energy, intelligent equipment, and efficient information technology. Based on five different saline-alkali land remediation measures, professional equipment recorded the growth and survival data of the seedlings, providing a reference for subsequent projects.

[0058] The experimental system is fully functional and guaranteed to operate normally. It prioritizes reliability, minimizes costs, ensures easy procurement of materials and equipment, facilitates rapid construction, and simplifies operation and maintenance. It accurately obtains data on the experimental planting soil and seedlings. The functional equipment transmits the data to the control computer, which then processes the experimental data. This equipment includes sensors for temperature, humidity, wind speed, wind direction, rainfall, and atmospheric pressure; a spherical infrared camera; a comprehensive soil sensor; patrol points; and wind, solar, and energy storage systems.

[0059] To ensure the reliability of the experimental system, a site consistent with the project's greening conditions was selected. The experimental site was divided into five plots: chemical treatment, physical isolation, hydraulic engineering, halophyte, and agricultural cultivation. The chemical treatment plots were placed separately from the other experimental plots. Each experimental plot was separated by a 5x5 meter grid with a ground wall. Fifteen types of seedlings were planted in each experimental plot, except for the halophyte treatment which used alfalfa as the understory.

[0060] The materials used are reasonably priced and feature-integrated equipment, and wireless intelligent equipment and new energy sources are employed. All materials and equipment are commonly used and easy to procure. Construction is quick, the design is compact, and the equipment installation is simple. Operation and maintenance are simple, as all installed equipment is intelligent and requires no human intervention.

[0061] Example 2

[0062] The EPC Golden Avenue road greening project is located on the coast, 5 kilometers from the nearest sea. The road greening runs east-west, with a 6-meter-wide median strip, 3-meter-wide side strips, and a 10-meter-wide setback strip. The finished surface of the green area is 0-30 centimeters higher than the road and surrounding areas. The pH value of the surrounding water system and soil is 7.0-9.5. The lowest annual temperature is in winter, with an average daily minimum temperature of -5 degrees Celsius, and the highest annual temperature is in summer, with an average daily maximum temperature of 38 degrees Celsius. The salinity is 0.5-1.5 g / kg; the organic matter content is 12-15 g / kg; the soil texture is loam; and the soil infiltration rate is 4-5 mm / h.

[0063] Currently, among various anti-salinity measures, earthwork and water conservancy projects, agricultural cultivation, halophytes, chemical amendments, and physical isolation measures are widely used. To verify the suitability of these methods for the project, a site with consistent greening conditions was found around the project site. The experimental plot was physically divided into five 5x5 meter squares, and comparative experiments were conducted in each square according to regulations. The most suitable theory verified will be applied to the project implementation. The most crucial aspect of tidal flat saline-alkali land greening projects is the seedling survival rate. Since there are no standardized guidelines or regulations for tidal flat saline-alkali land greening planting in China, the most reliable experimental method was adopted. Experimental planting was conducted from April 25, 2021 to February 25, 2022. The optimal method for improving seedling survival rate was summarized, and the greening design and construction were optimized accordingly.

[0064] This embodiment provides a method for greening saline-alkali land, which uses the test system of Embodiment 1 for testing. The specific steps are as follows:

[0065] S1. Construction Preparation: This mainly includes the preparation of personnel, materials, and equipment. Personnel will receive safety education and training, and safety technical briefings will be conducted and recorded. All materials, including crushed stone and cement, will be sampled and tested upon arrival at the site, and only those that pass the tests will be used. Concrete pouring equipment and test block making tools will be ensured to meet usage requirements. Wind power, solar power, and energy storage systems, dome cameras, integrated soil sensors, patrol systems, PVC sheathed SYWV cables, equipment boxes, equipment poles, environmental sensors, and control computer equipment will be procured.

[0066] S2. Measurement and layout: According to the design requirements of the drawings, measure and mark the width, elevation, and drainage slope of the civil engineering structure.

[0067] S3. The general construction principle is from bottom to top. For foundation pit excavation, hydraulic engineering excavation is 2.4 meters deep, and other test sites are excavated to a depth of 1.4 meters. For hydraulic engineering test sites, a 150mm thick graded crushed stone cushion layer (4) is used, and the brick masonry foundation is a 150mm thick C20 concrete (3). The drain pipe was laid (13), and 120mm thick brick masonry (1).

[0068] S4. Other test sites: rapid foundation pit excavation, equipment box and equipment pole foundations, 120mm thick brick masonry construction at all test sites (1), physical isolation test measures. The drain pipe is laid (13), a 150mm thick C20 concrete (3) is laid, and a 100mm thick C20 concrete steel reinforcement is laid. (11) Two-way drainage outlet (12) with graded pebbles; 300mm thick graded crushed stone (8) for halophyte measures, and two layers of geotextile (7). All test site civil engineering, 20mm thick 1:2 cement mortar (1% waterproofing agent) (2) 4% semi-decomposed corn stalk loess cover soil (5), on-site soil cover soil (9), and 50mm thick salt-washing and salt-suppressing reeds and (6) Drip irrigation (14), installation of soil integrated sensor (45), installation of sywv line, PVC sheath (43); finally, earthwork was completed, 4% semi-decomposed corn straw loess (5) and existing soil (10).

[0069] S5. After the civil engineering is completed, the next step is the installation of intelligent manufacturing equipment. Install the equipment box (65) and equipment pole (66), and place the intelligent storage battery (36) in the equipment box. Install the positive connection (40), negative connection (41) and SYWV line of the battery on the equipment pole, and PVC sheath (43). The installation sequence on the equipment pole is from top to bottom: install the wind power generation equipment (33), environmental sensor (58), spherical all-day camera (44), solar panel (37), equipment box (68), and finally purchase the control computer (67).

[0070] S5. After the installation of intelligent manufacturing equipment is completed, greening project will be implemented. The construction sequence is from top to bottom. The construction of trees and shrubs is as follows: Huangshan goldenrain tree (18), Muxifu crabapple (15), black pine (16), lilac (17), peach (19); the construction of understory and ground cover is as follows: flame Nandina domestica (21), red prince weigela (22), large-leaved boxwood (23), creeping juniper (24), golden privet (25), pittosporum (26), evergreen iris (27), Zephyranthes candida (28), alfalfa (29), dwarf Bermuda grass (20).

[0071] S6. All equipment is put into trial operation, cleaning and tidying are carried out in place, the project engineering department and the technical department hand over the work, and the technical department assigns a dedicated person to be in charge of information technology.

[0072] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A saline-alkali land greening experimental system, characterized in that: It includes various test sites that are physically isolated from each other. Each of the test sites includes a halophyte control test site, an agricultural cultivation control test site, a chemical control test site, a physical isolation control test site, and a hydraulic control test site, wherein the distance between the chemical control test site and the other test sites is not less than ten meters. The experimental site for halophyte measures was surrounded by a 120mm thick brick masonry wall, covered with a 20mm thick 1:2 cement mortar. The foundation under the brick masonry wall consisted of a 150mm thick C20 concrete wall and a 150mm thick layer of graded crushed stone. Inside the experimental site, from bottom to top, were placed a 300mm thick layer of graded crushed stone, two layers of geotextile, a 1000mm thick layer of 4% semi-decomposed corn stalk loess replacement layer, a 50mm thick layer of salt-washing and salt-suppressing reeds, and a 4% semi-decomposed corn stalk loess replacement layer. The experimental site for agricultural tillage measures was surrounded by a 120mm thick brick masonry wall, covered with a 20mm thick 1:2 cement mortar. The foundation under the brick masonry wall consisted of a 150mm thick C20 concrete wall and a 150mm thick layer of graded crushed stone. Inside the experimental site, from bottom to top, the site was filled with on-site soil, a 1000mm thick layer of 4% semi-decomposed corn stalk loess, a 50mm thick layer of salt-washing and salt-suppressing reeds, and another 4% semi-decomposed corn stalk loess. The chemical measures test site is surrounded by a 120mm thick brick masonry, with a 20mm thick 1:2 cement mortar plaster. The foundation under the brick masonry is a 150mm thick C20 concrete and a 150mm thick graded crushed stone. Inside the test site, from bottom to top, there is on-site soil, a 50mm thick layer of salt-washing and salt-suppressing reeds, and chemical amendments. The physical isolation test site was surrounded by a 120mm thick brick masonry, plastered with a 20mm thick 1:2 cement mortar. The foundation under the brick masonry consisted of a 150mm thick C20 concrete and a 150mm thick layer of graded crushed stone. Inside the test site, from bottom to top, the following were placed: compacted soil, ∅100pvc leaking pipe, a 150mm thick C20 concrete foundation and a 150mm thick C20 pipe cover, a 100mm thick C20 concrete reinforcing steel, graded pebbles, a 4% semi-decomposed corn stalk loess covering, a 50mm thick layer of salt-washing and salt-suppressing reeds, and a 4% semi-decomposed corn stalk loess covering the surface. The hydraulic measures test site is surrounded by a 120mm thick brick masonry, plastered with a 20mm thick 1:2 cement mortar. The foundation under the brick masonry is a 150mm thick C20 concrete and a 150mm thick graded crushed stone. Inside the test site, from bottom to top, are placed field soil, ∅100pvc drain pipe, field soil, ∅20pvc drip irrigation, and field soil.

2. The testing system as described in claim 1, characterized in that: Each of the aforementioned test sites is equipped with a greening layer. The trees on the greening layer include Malus spectabilis, Pinus thunbergii, Syringa vulgaris, Koelreuteria paniculata, and Prunus persica. The trees under the greening layer include Bermuda grass, Nandina domestica, Weigela florida, Buxus macrocarpa, Juniperus chinensis, Ligustrum japonicum, Pittosporum tobira, Iris tectorum, Zephyranthes candida, and Alfalfa.

3. The testing system as described in claim 1, characterized in that: The test system also includes wind power generation equipment that enables wind power generation at each of the test sites.

4. The testing system as described in claim 1, characterized in that: The testing system also includes intelligent manufacturing equipment for detecting each of the test sites, including a spherical all-day camera, an environmental sensor, a soil sensor, and a patrol system.

5. The testing system as described in claim 1, characterized in that: The agricultural tillage measures experimental plots use a 4% semi-decomposed corn stalk loess topsoil that is replaced and the soil is turned over four times a year.

6. The testing system as described in claim 1, characterized in that: The chemical amendment is selected from one or more of desulfurized gypsum, sulfate, organic or inorganic fertilizer, furfural residue, and comprehensive soil conditioner.

7. The testing system as described in claim 1, characterized in that: Each of the test sites has a size of 5 x 5 m.

8. A method for greening saline-alkali land, characterized in that: Comparative tests were conducted using the various test sites in the test system as described in any one of claims 1-7.

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