A plant root isolation and improvement composite planting module for saline-alkali soil

Abstract

The utility model discloses a kind of plant root system isolation improvement composite planting module for saline-alkali soil, belong to saline-alkali soil afforestation engineering technical field.The module is composed of composite structure by outer salt control ceramsite layer and inner pH buffer gel layer, bottom is equipped with conical root guide pipe, side wall is equipped with helical groove drainage channel, edge is equipped with dovetail slot buckle, top is equipped with detachable anti-evaporation cover plate.Salt control ceramsite layer adsorbs sodium ion, pH buffer gel layer maintains stable soil pH value, root guide pipe guides root system to grow downward, helical groove drainage channel prevents waterlogging salt return, dovetail slot buckle realizes module quick splicing, anti-evaporation cover plate reduces water evaporation.The utility model has the advantages of improving plant survival rate, long-acting improvement soil, construction is convenient, guiding root system growth, structure is stable, water-saving and moistening, suitable for saline-alkali soil landscaping and ecological restoration engineering.

Description

Technical Field

[0001] This utility model relates to the field of saline-alkali land greening engineering technology, specifically a plant root isolation and improvement composite planting module for saline-alkali land. Background Technology

[0002] Saline-alkali land improvement is an important issue in agricultural and ecological environment construction. Existing technologies mainly include methods such as topsoil replacement, chemical improvement, and biological improvement. However, topsoil replacement is costly and prone to secondary salinization; chemical amendments alone have limited effectiveness and may cause environmental pollution; biological improvement methods are slow to take effect and have unstable results. Some existing planting modules usually only focus on physical isolation or single improvement functions, lacking a comprehensive consideration of the impact of saline-alkali stress on plant roots, resulting in low plant survival rates and poor growth. Among existing technologies, traditional topsoil replacement is costly (approximately 20,000-30,000 yuan per acre) and prone to secondary salinization; single amendments (such as gypsum and sulfur) have short-lived effects and require repeated application; direct planting leads to root contact with salt, resulting in low survival rates (<30%).

[0003] Therefore, this application provides a plant root isolation and improvement composite planting module for saline-alkali land to solve the technical problems existing in the prior art. Utility Model Content

[0004] Purpose of the utility model: To provide a plant root isolation and improvement composite planting module for saline-alkali land, which effectively solves the problems of high cost, poor improvement effect and low survival rate in the existing technology through multi-functional integrated design.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The plant root isolation and improvement composite planting module of this utility model is characterized by: a composite structure consisting of an outer salt-controlling ceramic particle layer 1, an inner pH buffer gel layer 2, a bottom conical root guide tube 3, a side wall spiral groove drainage channel 4, an edge dovetail groove buckle 5, and a top detachable anti-evaporation cover plate 6.

[0007] Salt-controlling ceramsite layer 1: Thickness 5-8cm, porosity 62-68%, particle size 12-18mm, EC value <1.0mS / cm. This layer is made of salt-controlling ceramsite with good sodium ion adsorption capacity, effectively reducing soil salt concentration and providing a low-salt environment for plant roots [experimental data to support desalination rate are needed].

[0008] pH buffer gel layer 2: The thickness is 3-5cm, and it is composed of slow-release pH buffers (e.g., humic acid, diammonium hydrogen phosphate, etc.) [the specific formula and ratio need to be supplemented, and experimental data should be provided to support its pH buffering capacity and continuous release time], to maintain the pH value of the soil around the roots between 6.5 and 7.5, and provide a suitable acid-base environment for plant growth.

[0009] Root canal: A biodegradable film seal at the bottom guides plant roots downwards through the saline-alkali layer, avoiding high-salt areas and improving plant survival rates. The root canal is 10cm in diameter, and its tapered design promotes downward root growth. The material and degradation time of the biodegradable film should be selected based on the plant's root growth rate.

[0010] Spiral groove drainage channel 4: The pitch is 8-12cm, the depth is 0.8-1.2cm, and a filter screen is installed at the bottom of the groove for effective drainage and to prevent secondary salinization caused by water accumulation. The filter screen can prevent soil erosion, and different pore sizes can be selected as needed.

[0011] Dovetail groove buckle 5: Made of high-strength weather-resistant engineering plastic, it ensures a firm connection between modules, facilitates module installation and disassembly, and is suitable for large-scale application.

[0012] Anti-evaporation cover 6: Made of polycarbonate material, the cover has ventilation holes along its edges to reduce water evaporation, maintain soil moisture, and promote plant growth. The design of the ventilation holes must ensure effective ventilation while preventing excessive soil moisture evaporation.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Multifunctional integrated design: Integrates functions such as salt control, pH buffering, drainage, and root guidance into one module, simplifying the construction process and reducing costs.

[0015] 2. Highly effective salt and alkali improvement: The salt-controlling ceramsite layer 1 and pH buffer gel layer 2 work together to effectively reduce soil salinity and regulate soil pH, providing a favorable environment for plant growth.

[0016] 3. Modular design: Facilitates transportation, installation, and assembly, improves construction efficiency, and is suitable for large-scale application.

[0017] 4. Biodegradable film sealing: This avoids the environmental pollution problems caused by the difficulty in degrading sealing materials in traditional methods. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] In the diagram: 1. Salt-controlling ceramic particle layer 1; 2. pH buffer gel layer 2; 3. Conical root canal 3; 4. Spiral groove drainage channel 4; 5. Dovetail groove buckle 5; 6. Anti-evaporation cover plate 6; 7. Biodegradable film seal 7. Detailed Implementation

[0020] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0021] like Figure 1 As shown, the plant root isolation and improvement composite planting module for saline-alkali land in this embodiment consists of an outer layer of salt-controlling ceramsite 1 and an inner layer of pH buffer gel 2, forming a composite structure. The module has a conical root guide tube 3 at the bottom, a spiral groove drainage channel 4 on the side wall, dovetail groove buckles 5 at the edge, and a detachable anti-evaporation cover 6 at the top. The porosity of the salt-controlling ceramsite layer 1 is 62-68%, and the particle size is 12-18 mm. The root guide tube has a biodegradable film seal 7 at the bottom. The spiral groove drainage channel 4 has a pitch of 8-12 cm and a depth of 0.8-1.2 cm, with a filter screen at the bottom of the groove. The dovetail groove buckles 5 are made of high-strength, weather-resistant engineering plastic. The anti-evaporation cover 6 is made of polycarbonate material, and ventilation holes are provided at the edge of the cover.

[0022] Example 1: Planting salt-tolerant shrubs in a single module

[0023] Module Preparation: Prepare one planting module as described above, with a diameter of 50cm and a height of 40cm. The salt-controlling ceramic granule layer 1 is 6.5cm thick, with a particle size of 15mm and a porosity of 65%. The pH buffer gel layer 2 is 4.5cm thick. The bottom of the root canal is sealed with a 0.05mm thick biodegradable polylactic acid film. The spiral groove has a pitch of 10cm and a depth of 1cm, with a nylon filter screen installed at the bottom. The dovetail groove clip 5 is made of polypropylene engineering plastic. The anti-evaporation cover 6 is made of polycarbonate material, with 5mm diameter ventilation holes along the edges.

[0024] Planting hole preparation: Dig a planting hole with a diameter of 60cm and a depth of 50cm in saline-alkali soil.

[0025] Module Placement: Place the planting module into the planting hole, ensuring that the bottom of the module is in close contact with the ground.

[0026] Soil filling: Fill the module with improved soil with the following ratio: leaf mold: vermiculite: perlite = 5:3:2, and add a small amount of organic fertilizer.

[0027] Planting: Select seedlings of salt-tolerant shrub Suaeda salsa and carefully plant them in the center of the module.

[0028] Maintenance and management: Water thoroughly after planting, and perform regular watering, fertilization and other maintenance and management.

[0029] Effect evaluation: Six months after planting, observe the growth of Suaeda salsa and test the salt content, pH value and other indicators of the soil inside and outside the module.

[0030] Expected results: Suaeda salsa grows well, with a survival rate of over 95%. The soil salinity inside the module is significantly lower than that of the external saline-alkali land, and the pH value is maintained between 6.5 and 7.5.

[0031] Example 2: Multi-module splicing planting hedge

[0032] Module preparation: Prepare 6 planting modules, with the same dimensions as in Example 1.

[0033] Site preparation: Plan a 3-meter-long hedge planting strip on the saline-alkali land and level it simply.

[0034] Modular splicing: Six planting modules are spliced ​​together in a straight line using dovetail groove clips to form the framework of the hedge.

[0035] Soil filling: Fill the module with improved soil with the following ratio: peat: river sand: organic fertilizer = 6:3:1.

[0036] Planting: Select salt-tolerant tamarisk (Tamarix chinensis) seedlings and plant one seedling every 50cm, for a total of 6 seedlings.

[0037] Maintenance and management: Water thoroughly after planting, and perform regular watering, fertilization, pruning and other maintenance and management.

[0038] Effect evaluation: One year after planting, the growth of tamarisk was observed, and the salinity, pH value, plant height, and crown width of the soil inside and outside the module were tested.

[0039] Expected Results: The tamarisk will grow vigorously, forming a neat green hedge. The soil salinity inside the module will be significantly lower than that of the external saline-alkali land, with the pH value maintained between 6.5 and 7.5. The average height of the plants will reach over 1.5 meters, with full crowns.

[0040] Example 3: Module Material Performance Testing

[0041] Salt-controlling ceramsite: Salt-controlling ceramsite with a particle size of 15mm was selected for salt absorption performance testing. The ceramsite was soaked in a 1% sodium chloride solution, and the sodium ion concentration in the solution was measured after 24 hours to calculate the desalination rate of the ceramsite.

[0042] Expected result: The desalination rate of the expanded clay aggregate will reach over 85%.

[0043] Biodegradable film: A 0.05 mm thick biodegradable polylactic acid film was selected for degradation performance testing. The film was buried in the soil, and its strength and weight changes were monitored periodically.

[0044] Expected results: The film will begin to degrade within 3 months and will be almost completely degraded after 6 months.

[0045] Dovetail Clip 5: Perform a tensile strength test on the dovetail clip 5. Connect the two modules with the clip, apply tension until the clip breaks, and record the maximum tensile force value.

[0046] Expected result: The tensile strength of the buckle will reach over 500N.

[0047] Anti-evaporation cover 6: The light transmittance and UV resistance performance of the anti-evaporation cover 6 are tested.

[0048] Expected results: The light transmittance of the cover plate will reach over 80%, with good UV resistance and a service life of over 5 years.

[0049] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A plant root isolation and improvement composite planting module for saline-alkali land, characterized in that: The module has a composite structure consisting of an outer layer of salt-controlling ceramic particles and an inner layer of pH buffer gel. The bottom of the module is equipped with a conical root canal, the side wall of the module is equipped with a spiral groove drainage channel, the edge of the module is equipped with a dovetail groove buckle, and the top of the module is equipped with a removable anti-evaporation cover.

2. The planting module according to claim 1, characterized in that: The porosity of the salt-controlled ceramic granule layer is 62-68%, and the particle size is 12-18 mm.

3. The planting module according to claim 1, characterized in that: The bottom of the root canal is sealed with a biodegradable film.

4. The planting module according to claim 1, characterized in that: The spiral groove drainage channel has a pitch of 8-12cm and a depth of 0.8-1.2cm, and a filter screen is provided at the bottom of the groove.

5. The planting module according to claim 1, characterized in that: The dovetail groove buckle is made of high-strength, weather-resistant engineering plastic.

6. The planting module according to claim 1, characterized in that: The anti-evaporation cover is made of polycarbonate material, and the edge of the cover has ventilation holes.

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