Method for planting suaeda salsa in saline-alkali soil

Abstract

The invention relates to the technical field of ecological management, and discloses a method for planting suaeda salsa in saline-alkali soil, which comprises the following steps: seed pretreatment: freezing suaeda salsa seeds in a low-temperature environment of-5 DEG C to 0 DEG C for 12-24 hours, then quickly transferring the seeds to an environment of 25 DEG C to 30 DEG C, unfreezing and activating, and taking out the seeds; then putting into a mixed solution containing 0.5%-1% of biological enzyme and 0.3%-0.5% of plant hormone, and soaking for 8-12 hours; soil improvement: paving a layer of mixture of organic fertilizer and saline-alkali tolerant microbial agent with the thickness of 5-10cm on the surface of the saline-alkali soil. Through an innovative seed pretreatment method, low-temperature freezing and unfreezing activation are combined with biological enzyme and plant hormone solution soaking, seed dormancy is broken, internal physiological metabolism of seeds is activated, and the seeds germinate more quickly and neatly. The organic fertilizer and the saline-alkaline tolerant microbial agent in scientific proportion are matched for soil improvement, so that the saline-alkaline degree of the soil is effectively reduced, and the microbial community structure of the soil is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ecological management, in particular to a method for planting Suaeda salsa in saline-alkali land. Background Art

[0002] Planting vegetation in saline-alkali land is of great significance for improving the ecological environment and developing and utilizing land resources. As a salt-alkali tolerant plant, Suaeda salsa has great potential in the ecological restoration of saline-alkali land. However, existing technologies have many shortcomings in the cultivation of Suaeda salsa. At present, seed pretreatment methods are relatively simple, and conventional soaking and other means are mostly used. It is difficult to effectively break the dormancy of seeds, resulting in low and uneven seed germination rate, affecting the survival rate of seedlings and subsequent growth. Soil improvement technology is also limited, often relying on a single chemical fertilizer or ordinary organic fertilizer. It is difficult to effectively reduce soil salinity and optimize the structure of soil microbial communities, and it is impossible to provide an ideal soil environment for seed germination and plant growth.

[0003] Existing irrigation management methods are often based on fixed experience, failing to precisely adjust irrigation volume and frequency based on real-time soil conditions. This can lead to water waste and soil salinity accumulation. Planting patterns lack ecological complementarity considerations, with most cropping methods relying on a single crop. This can lead to deteriorating soil microenvironment and severe weed growth, forcing farmers to use extensive amounts of chemical herbicides, which not only increases planting costs but also poses potential risks to the ecological environment.

[0004] In summary, the existing Salicornia herba cultivation technology cannot fully meet the needs of saline-alkali land vegetation cultivation. A planting method is needed that can enhance seed vitality, precisely control irrigation, optimize the soil environment and take into account ecological benefits. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method for planting Suaeda salsa in saline-alkali land, which solves the problems raised in the above background technology.

[0006] To achieve the above object, the present invention is implemented by the following technical solution: a method for planting Suaeda salsa in saline-alkali land, comprising the following steps:

[0007] Seed pretreatment: Freeze the Suaeda salsa seeds at -5-0°C for 12-24 hours, then quickly transfer them to a 25-30°C environment for thawing and activation, and then soak them in a mixed solution containing 0.5%-1% biological enzymes and 0.3%-0.5% plant hormones for 8-12 hours;

[0008] Soil improvement: A 5-10cm thick layer of organic fertilizer and salt-alkali-tolerant microbial agent mixture is laid on the surface of saline-alkali land. The organic fertilizer is a mixture of composted seaweed residue, shrimp shell powder, and livestock manure in a mass ratio of 2:1:1. The seaweed residue is rich in various marine bioactive substances. The salt-alkali-tolerant microbial agent contains Bacillus, actinomycetes, and yeast in a mass ratio of 3:2:1. It is used to reduce soil salinity and improve the soil microbial community structure.

[0009] Sowing: Use a precision seeder to sow the pretreated seeds in rows at a density of 50-80 seeds per square meter, with a sowing depth of 3-4 cm and a row spacing of 5-10 cm.

[0010] Preferably, in the seed pretreatment step, the pH value of the mixed solution is adjusted to 5.5-6.5, and a small amount of oxygen is continuously introduced during the soaking process, with an oxygen flow rate of 0.1-0.2 L / min, to maintain the redox potential of the solution, promote the physiological metabolic reactions in the seeds, and improve the vitality and germination potential of the seeds.

[0011] Preferably, in the soil improvement step, before laying the mixture of organic fertilizer and salt-alkali tolerant microbial agent, a new type of soil loosening machine is first used to deep loosen the saline-alkali land, with a deep loosening depth of 30-40 cm. At the same time, expanded perlite accounting for 10%-15% of the soil volume is mixed into the soil to increase the air permeability and water permeability of the soil and improve the physical structure of the soil.

[0012] Preferably, in the sowing step, the precision seeder is equipped with a seed monitoring sensor, which can monitor the sowing quantity and position of seeds in real time, and automatically adjust the sowing speed and sowing amount through an intelligent control system to ensure sowing uniformity and accuracy.

[0013] Preferably, in the irrigation management step, the intelligent irrigation system also includes a rainwater collection device and a reclaimed water reuse system, which can collect, filter and store reclaimed water generated by rainfall and production and life, and mix it with seawater desalination water or clean water from natural river wetlands in a certain proportion for irrigation. At the same time, the irrigation system is equipped with salt ion selective electrodes, which can monitor the salt content in the irrigation water in real time and automatically adjust the salt concentration of the irrigation water according to the dynamic changes in soil salinity, so as to achieve precise irrigation and salt regulation. In addition, during the entire irrigation process, a buffer isolation zone is set up around the wetland and a closed transmission pipeline is used to avoid damage or pollution to the natural wetland environment.

[0014] Preferably, the method is controlled by an intelligent monitoring and control system. The system collects soil, climate and plant growth data in real time through a variety of sensors set up in the field, and transmits the data to a central control unit. The central control unit uses big data analysis and artificial intelligence algorithms to process and analyze the data, establish a growth model of Salicornia herba and a dynamic change model of soil salinity, and automatically regulates agronomic measures such as irrigation, fertilization, and sowing according to the model prediction results to achieve precise planting and intelligent management.

[0015] Preferably, an ecological protection barrier is set up around the salsa salsa planting area. The barrier consists of a multi-layer structure, including an outer layer of windbreak and sand fixation net, a middle layer of salt-alkali tolerant plant hedge and an inner layer of microbial agent spraying belt. The salt-alkali tolerant plant hedge is made of plants such as salsa salsa, halophyte and salt horn grass, which are mixed in a ratio of 2:1:1, with a row spacing of 1m and a plant spacing of 0.5m to form a dense plant barrier. The microbial agent spraying belt sprays a layer of salt-alkali tolerant microbial agent with a thickness of 0.5-1cm on the surface every 2-3m.

[0016] The present invention provides a method for planting Suaeda salsa in saline-alkali land, which has the following beneficial effects:

[0017] 1. The present invention uses an innovative seed pretreatment method, utilizing low-temperature freezing and thawing activation combined with soaking in a biological enzyme and plant hormone solution to break seed dormancy while activating its internal physiological metabolism, allowing seeds to germinate more quickly and uniformly. The combination of scientifically proportioned organic fertilizers and salt-alkali-tolerant microbial agents for soil improvement can not only effectively reduce soil salinity and improve the structure of soil microbial communities, but also provide a loose and fertile soil environment for seed germination, thereby significantly improving the survival rate of Suaeda salsa seedlings, accelerating vegetation coverage in saline-alkali land, and forming a stable plant community, laying a good foundation for soil improvement and ecological restoration.

[0018] 2. This invention utilizes an intelligent irrigation system that integrates multiple water sources and combines salt ion monitoring and control to achieve precise adaptation of irrigation water salinity. This not only meets the water needs of Suaeda salsa at different growth stages, but also prevents soil salt accumulation caused by overirrigation, achieving the dual benefits of water conservation and salt control. Furthermore, intercropping with Salicornia herbacea and Puccinia repens creates an ecologically complementary effect, improves the soil microenvironment, inhibits weed growth, and reduces the use of chemical herbicides, thus reducing planting costs and increasing the comprehensive utilization rate of saline-alkali land.

[0019] 3. The intelligent monitoring and control system of the present invention establishes growth models and saline-alkali dynamic models based on real-time field data, enabling precise control of agronomic measures such as irrigation and fertilization, improving the timeliness and accuracy of planting management, and promoting the healthy growth of Suaeda salsa. Combined with the multi-layered structural design of the ecological protection barrier, it resists wind and sand erosion at both physical and biological levels, reduces soil salt accumulation, and enhances the buffering and self-purification capacity of saline-alkali land. This makes the entire planting system more resistant and adaptable, enabling long-term and stable operation in saline-alkali land environments, providing a strong guarantee for the sustainable development of saline-alkali land agriculture. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of irrigation management and growth regulation of the present invention;

[0021] Figure 2 It is a flow chart of soil improvement and sowing of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1, please refer to the attached Figure 1 -Attached Figure 2 The embodiment of the present invention provides a method for planting Suaeda salsa in saline-alkali land, comprising:

[0024] Seed pretreatment: Select healthy Suaeda salsa seeds, place them in a low-temperature environment of -2°C for freezing treatment for 18 hours, and then quickly transfer them to an environment of 28°C for thawing and activation. Next, place the seeds in a mixed solution containing 0.8% biological enzymes (α-amylase and protease mixed in a mass ratio of 3:2) and 0.4% plant hormones (indoleacetic acid and gibberellin mixed in a mass ratio of 1:1). The pH value of the solution is adjusted to 6.0, and a small amount of oxygen is continuously introduced during the soaking process, with an oxygen flow rate of 0.15L / min, and the seeds are soaked for 10 hours.

[0025] Soil Improvement: Deeply loosen the saline-alkali land to a depth of 35cm and incorporate expanded perlite, which accounts for 12% of the soil volume. Then, apply an 8cm-thick layer of a mixture of organic fertilizer and salt- and alkali-tolerant microbial inoculants to the surface. The organic fertilizer is a mixture of composted seaweed residue, shrimp shell powder, and livestock manure in a 2:1:1 ratio. The salt- and alkali-tolerant microbial inoculants contain Bacillus, actinomycetes, and yeast in a 3:2:1 ratio.

[0026] Sowing: A precision seeder equipped with a seed monitoring sensor monitors the number and location of seeds in real time and automatically adjusts the sowing speed and rate through an intelligent control system. Pre-treated seeds are drilled at a density of 65 seeds per square meter, at a depth of 1.5 cm and with a row spacing of 22 cm.

[0027] Irrigation management: Utilizing an intelligent irrigation system, irrigation volume and frequency are automatically adjusted based on real-time data from soil moisture and salinity sensors. The irrigation water source is desalinated seawater treated by a solar distillation device or clean water from natural river wetlands. Its conductivity is controlled at 0.5 dS / m, and its pH is adjusted to 6.5. During the irrigation process, drip irrigation is alternated with micro-sprinkler irrigation, with drip irrigation twice a day for 10 minutes each, and micro-sprinkler irrigation is once every three days for 30 minutes each. This ensures uniform soil moisture and prevents soil salt accumulation, while also ensuring that the irrigation process does not damage or pollute the natural wetland environment.

[0028] Growth regulation: During the seedling stage, growth stage and flowering stage of Salicornia salsa, nutrient solution containing specific biostimulants is applied respectively. The nutrient solution is prepared with degradable organic matter extracts from the surrounding natural river wetlands, and its composition and application dosage must ensure that it will not cause pollution to the natural wetland environment. The nutrient solution during the growth stage contains 0.15% urea, 0.1% potassium dihydrogen phosphate and 0.05% potassium sulfate, and the nutrient solution during the flowering stage contains 0.2% boric acid, 0.1% ammonium molybdate and 0.05% zinc sulfate.

[0029] Example 2

[0030] Seed pretreatment: Select healthy Suaeda salsa seeds, place them in a low-temperature environment of -5°C for freezing treatment for 24 hours, and then quickly transfer them to an environment of 25°C for thawing and activation. Next, place the seeds in a mixed solution containing 0.5% biological enzymes (α-amylase and protease mixed in a mass ratio of 2:1) and 0.3% plant hormones (indoleacetic acid and gibberellin mixed in a mass ratio of 2:1). The pH value of the solution is adjusted to 5.5, and a small amount of oxygen is continuously introduced during the soaking process at an oxygen flow rate of 0.1L / min. The seeds are soaked for 8 hours.

[0031] Soil Improvement: Deeply loosen the saline-alkali land to a depth of 30cm and incorporate expanded perlite, which accounts for 10% of the soil volume. Then, apply a 5cm-thick layer of a mixture of organic fertilizer and salt- and alkali-tolerant microbial inoculants on the surface. The organic fertilizer is a mixture of composted seaweed residue, shrimp shell powder, and livestock manure in a mass ratio of 2:1:1. The salt- and alkali-tolerant microbial inoculants contain Bacillus, actinomycetes, and yeast in a mass ratio of 3:2:1.

[0032] Sowing: A precision seeder equipped with a seed monitoring sensor monitors the number and location of seeds in real time and automatically adjusts the sowing speed and rate through an intelligent control system. Pre-treated seeds are drilled at a density of 50 seeds per square meter, at a depth of 1 cm and with a row spacing of 20 cm.

[0033] Irrigation management: Utilizing an intelligent irrigation system, the irrigation volume and frequency are automatically adjusted based on real-time data from soil moisture and salinity sensors. The irrigation water source is desalinated seawater treated by a solar distillation device or clean water from natural river wetlands. Its conductivity is controlled at 1.1 dS / m, and its pH is adjusted to 6.6. During the irrigation process, drip irrigation is alternated with micro-sprinkler irrigation, with drip irrigation twice a day for 11 minutes each, and micro-sprinkler irrigation is once every four days for 32 minutes each. This ensures uniform soil moisture and prevents soil salt accumulation, while also ensuring that the irrigation process does not damage or pollute the natural wetland environment.

[0034] Growth regulation: During the seedling stage, growth stage and flowering stage of Salicornia salsa, nutrient solution containing specific biostimulants is applied respectively. The nutrient solution is prepared with degradable organic matter extracts from the surrounding natural river wetlands, and its composition and application dosage must ensure that it will not cause pollution to the natural wetland environment. The nutrient solution during the growth stage contains 0.16% urea, 0.11% potassium dihydrogen phosphate and 0.07% potassium sulfate, and the nutrient solution during the flowering stage contains 0.21% boric acid, 0.11% ammonium molybdate and 0.05% zinc sulfate.

[0035] Example 3

[0036] Seed pretreatment: Select healthy Suaeda salsa seeds, place them in a low-temperature environment of -3°C for freezing treatment for 20 hours, and then quickly transfer them to an environment of 30°C for thawing and activation. Next, place the seeds in a mixed solution containing 1% biological enzymes (α-amylase and protease mixed in a mass ratio of 4:1) and 0.5% plant hormones (indoleacetic acid and gibberellin mixed in a mass ratio of 1:2). The pH value of the solution is adjusted to 6.5, and a small amount of oxygen is continuously introduced during the soaking process, with an oxygen flow rate of 0.2L / min, and the seeds are soaked for 12 hours.

[0037] Soil Improvement: Deeply loosen the saline-alkali land to a depth of 40cm and incorporate expanded perlite, which accounts for 15% of the soil volume. Then, apply a 10cm-thick layer of a mixture of organic fertilizer and salt- and alkali-tolerant microbial inoculants on the surface. The organic fertilizer is a mixture of composted seaweed residue, shrimp shell powder, and livestock manure in a mass ratio of 2:1:1. The salt- and alkali-tolerant microbial inoculants contain Bacillus, actinomycetes, and yeast in a mass ratio of 3:2:1.

[0038] Sowing: A precision seeder equipped with a seed monitoring sensor monitors the number and location of seeds in real time and automatically adjusts the sowing speed and rate through an intelligent control system. Pre-treated seeds are drilled at a density of 80 seeds per square meter, at a depth of 2 cm and with a row spacing of 25 cm.

[0039] Irrigation management: Utilizing an intelligent irrigation system, the irrigation volume and frequency are automatically adjusted based on real-time data from soil moisture and salinity sensors. The irrigation water source is desalinated seawater treated by a solar distillation device or clean water from natural river wetlands. Its conductivity is controlled at 1.5 dS / m, and its pH is adjusted to 7.5. During the irrigation process, drip irrigation is alternated with micro-sprinkler irrigation, with three 15-minute drip irrigations per day and one 45-minute micro-sprinkler irrigation every five days. This ensures uniform soil moisture and prevents soil salt accumulation, while also ensuring that the irrigation process does not damage or pollute the natural wetland environment.

[0040] Growth regulation: During the seedling stage, growth stage and flowering stage of Salicornia salsa, nutrient solution containing specific biostimulants is applied respectively. The nutrient solution is prepared with degradable organic matter extracts from the surrounding natural river wetlands, and its composition and application dosage must ensure that it will not cause pollution to the natural wetland environment. The nutrient solution during the growth stage contains 0.25% urea, 0.2% potassium dihydrogen phosphate and 0.1% potassium sulfate, and the nutrient solution during the flowering stage contains 0.3% boric acid, 0.2% ammonium molybdate and 0.1% zinc sulfate.

[0041] Example 4

[0042] Seed pretreatment: Select healthy Suaeda salsa seeds, place them in a low-temperature environment of -4°C for freezing treatment for 15 hours, and then quickly transfer them to an environment of 27°C for thawing and activation. Next, place the seeds in a mixed solution containing 0.7% biological enzymes (α-amylase and protease mixed in a mass ratio of 3:1) and 0.35% plant hormones (indoleacetic acid and gibberellin mixed in a mass ratio of 3:2). The pH value of the solution is adjusted to 6.2, and a small amount of oxygen is continuously introduced during the soaking process, with an oxygen flow rate of 0.12L / min, and the soaking time is 9 hours.

[0043] Soil Improvement: Deeply loosen the saline-alkali land to a depth of 32cm and incorporate expanded perlite, which accounts for 11% of the soil volume. Then, apply a 6cm-thick layer of a mixture of organic fertilizer and salt- and alkali-tolerant microbial inoculants to the surface. The organic fertilizer is a mixture of composted seaweed residue, shrimp shell powder, and livestock manure in a 2:1:1 ratio. The salt- and alkali-tolerant microbial inoculants contain Bacillus, actinomycetes, and yeast in a 3:2:1 ratio.

[0044] Sowing: A precision seeder equipped with a seed monitoring sensor monitors the number and location of seeds in real time and automatically adjusts the sowing speed and rate through an intelligent control system. Pre-treated seeds are drilled at a density of 55 seeds per square meter, at a depth of 1.2 cm and with a row spacing of 21 cm.

[0045] Irrigation management: Utilizing an intelligent irrigation system, the irrigation volume and frequency are automatically adjusted based on real-time data from soil moisture and salinity sensors. The irrigation water source is desalinated seawater treated by a solar distillation device or clean water from natural river wetlands. Its conductivity is controlled at 0.5 dS / m, and its pH is adjusted to 7.5. During the irrigation process, drip irrigation is alternated with micro-sprinkler irrigation, with three 15-minute drip irrigations per day and one 35-minute micro-sprinkler irrigation every three days. This ensures uniform soil moisture and prevents soil salt accumulation, while also ensuring that the irrigation process does not damage or pollute the natural wetland environment.

[0046] Growth regulation: During the seedling stage, growth stage and flowering stage of saltwort, nutrient solution containing specific biostimulants is applied respectively. The nutrient solution is prepared with degradable organic matter extracts from the surrounding natural river wetlands, and its composition and application dosage must ensure that it will not cause pollution to the natural wetland environment. The nutrient solution during the growth stage contains 0.25% urea, 0.2% potassium dihydrogen phosphate and 0.05% potassium sulfate, and the nutrient solution during the flowering stage contains 0.2% boric acid, 0.1% ammonium molybdate and 0.05% zinc sulfate.

[0047] Example 5

[0048] Seed pretreatment: Select healthy Suaeda salsa seeds, place them in a low-temperature environment of -1°C for freezing treatment for 22 hours, and then quickly transfer them to an environment of 29°C for thawing and activation. Next, place the seeds in a mixed solution containing 0.9% biological enzymes (α-amylase and protease mixed in a mass ratio of 4:3) and 0.45% plant hormones (indoleacetic acid and gibberellin mixed in a mass ratio of 4:3). The pH value of the solution is adjusted to 6.3, and a small amount of oxygen is continuously introduced during the soaking process, with an oxygen flow rate of 0.18L / min, and the soaking time is 11 hours.

[0049] Soil Improvement: Deeply loosen the saline-alkali land to a depth of 38cm and incorporate expanded perlite, which accounts for 14% of the soil volume. Then, apply a 9cm-thick layer of a mixture of organic fertilizer and salt- and alkali-tolerant microbial inoculants to the surface. The organic fertilizer is a mixture of composted seaweed residue, shrimp shell powder, and livestock manure in a 2:1:1 ratio. The salt- and alkali-tolerant microbial inoculants contain Bacillus, actinomycetes, and yeast in a 3:2:1 ratio.

[0050] Sowing: A precision seeder equipped with a seed monitoring sensor monitors the number and location of seeds in real time and automatically adjusts the sowing speed and rate through an intelligent control system. Pre-treated seeds are drilled at a density of 75 seeds per square meter, at a depth of 1.8 cm and with a row spacing of 24 cm.

[0051] Irrigation management: Utilizing an intelligent irrigation system, the irrigation volume and frequency are automatically adjusted based on real-time data from soil moisture and salinity sensors. The irrigation water source is desalinated seawater treated by a solar distillation device or clean water from natural river wetlands. Its conductivity is controlled at 1.4 dS / m, and its pH is adjusted to 7.4. During the irrigation process, drip irrigation is alternated with micro-sprinkler irrigation, with three 13-minute drip irrigation sessions per day and 35-minute micro-sprinkler irrigation every three to five days. This ensures uniform soil moisture and prevents soil salt accumulation, while also ensuring that the irrigation process does not damage or pollute the natural wetland environment.

[0052] Growth regulation: During the seedling stage, growth stage and flowering stage of Salicornia salsa, nutrient solution containing specific biostimulants is applied respectively. The nutrient solution is prepared with degradable organic matter extracts from the surrounding natural river wetlands, and its composition and application dosage must ensure that it will not cause pollution to the natural wetland environment. The nutrient solution during the growth stage contains 0.18% urea, 0.18% potassium dihydrogen phosphate and 0.06% potassium sulfate, and the nutrient solution during the flowering stage contains 0.28% boric acid, 0.1% ammonium molybdate and 0.05% zinc sulfate.

[0053] Comparative Example 1

[0054] Conventional seed pretreatment methods were used, i.e., the Suaeda salsa seeds were soaked in clean water for only 6 hours, without freezing or thawing activation, and without the addition of biological enzymes and plant hormones. Ordinary farmyard manure was used for soil improvement, without deep loosening or the addition of expanded perlite. Traditional manual sowing was used for sowing, with a density of 40 seeds per square meter, a sowing depth of 0.5 cm, and a row spacing of 15 cm. Simple flooding was used for irrigation, without any monitoring or regulation, and the irrigation water source was untreated groundwater. For growth regulation, ordinary nitrogen, phosphorus, and potassium compound fertilizer was applied only once during the growth period, and no intercropping or ecological protection barriers were set up.

[0055] Comparative Example 2

[0056] The operation of Comparative Example 2 is basically the same as that of Example 1, except that in the seed pretreatment step, only freezing and thawing activation are performed, and no soaking in the enzyme and plant hormone solution is performed. At the same time, in the soil improvement step, only organic fertilizer is applied, and no salt-alkali-tolerant microbial agent is added.

[0057] Comparative Example 3

[0058] The operation of Comparative Example 3 was essentially the same as that of Example 1, except that only drip irrigation was used in the irrigation management step, micro-sprinkler irrigation was not performed, and rainwater collection devices and a reclaimed water reuse system were not utilized. Furthermore, intercropping and ecological protection barriers were not implemented.

[0059] Comparative Example 4

[0060] The operation of Comparative Example 4 is basically the same as that of Example 1, but in the growth control step, only the nutrient solution is applied during the growth period, and the nutrient solution is not applied during the seedling and flowering periods. At the same time, no intelligent monitoring and control system is used for control.

[0061] Comparative Example 5

[0062] The operation of Comparative Example 5 is basically the same as that of Example 1, except that in the soil improvement step, only deep loosening is performed without adding expanded perlite. At the same time, in the sowing step, a traditional seeder is used without seed monitoring sensors and intelligent control systems.

[0063] Test example

[0064] Experimental Design:

[0065] The methods described in Examples 1-5 and Comparative Examples 1-5 were applied to saline-alkali land of the same area to carry out a Suaeda salsa planting test. Three replicate test plots were set up for each method, each plot having an area of ​​1000 square meters. The test time was one complete growth cycle (approximately 120 days). During the test, the following data were recorded:

[0066] Seed germination rate: The percentage of seeds that germinated 10 days after sowing to the total number of seeds sown.

[0067] Seedling survival rate: The percentage of surviving seedlings to the number of germinated seeds is counted after the seedlings have grown for 30 days.

[0068] Soil salinity: Soil salinity was measured before planting and 60 days after planting and expressed as electrical conductivity (dS / m).

[0069] Plant height: The average plant height (cm) of Suaeda salsa was measured 60 and 120 days after planting.

[0070] Yield: The fresh weight (kg) of Suaeda salsa in each plot was counted at harvest.

[0071] The test results are shown in Table 1 below:

[0072]

[0073]

[0074] Table 1

[0075] Conclusion: From the test results, it can be seen that the seed germination rate and seedling survival rate of the salsa salsa planted using the method of the present invention (Examples 1-5) are significantly higher than those of Comparative Examples 1-5. The seed germination rates of Examples 1-5 are all between 84% and 90%, while the seed germination rate of Comparative Example 1 is only 65%. This shows that the seed pretreatment method of the present invention can effectively break seed dormancy, activate the internal physiological metabolism of seeds, and increase the germination rate of seeds. At the same time, the seedling survival rate of Examples 1-5 is also between 90% and 94%, which is a significant improvement over the 70% of Comparative Example 1, indicating that the comprehensive method of the present invention provides a good soil environment and growth conditions for seedling growth.

[0076] In terms of soil salinity, the soil salinity of Examples 1-5 decreased significantly after planting, by 60%-65% compared to before planting. In contrast, the soil salinity of Comparative Example 1 decreased by only about 15%, and the reduction in soil salinity of Comparative Examples 2-5 was significantly less than that of the Examples. This demonstrates that the soil improvement method of the present invention can effectively reduce soil salinity, improve the soil microbial community structure, and create favorable soil conditions for the growth of Suaeda salsa.

[0077] In terms of plant growth, the plant heights of the Suaeda salsa plants of Examples 1-5 were significantly higher than those of Comparative Examples 1-5 at both 60 and 120 days after planting. For example, the plant height of Example 1 was 35 cm at 60 days after planting, while that of Comparative Example 1 was only 20 cm. The plant height of Example 3 reached 85 cm at 120 days after planting, while that of Comparative Example 1 was only 45 cm. This demonstrates that the method of the present invention promotes the rapid growth of Suaeda salsa and increases plant biomass.

[0078] In terms of yield, the yields of Suaeda salsa in Examples 1-5 were significantly higher than those in Comparative Examples 1-5. The yields of Examples 1-5 ranged from 1200 to 1300 kg, while the yield of Comparative Example 1 was only 800 kg. The yields of Comparative Examples 2-5 were also significantly lower than those in the Examples. This demonstrates that the method of the present invention can effectively increase the yield of Suaeda salsa and has good economic benefits.

[0079] In summary, the method of planting Suaeda salsa in saline-alkali land of the present invention has significant beneficial effects, can improve seed germination rate and seedling survival rate, reduce soil salinity, promote plant growth, increase yield, and provide effective technical support for ecological restoration and agricultural development of saline-alkali land.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for planting Suaeda salsa in saline-alkali land, characterized in that: The following steps are involved: Seed pretreatment: Freeze the Suaeda salsa seeds at -5-0°C for 12-24 hours, then quickly transfer them to a 25-30°C environment for thawing and activation, and then soak them in a mixed solution containing 0.5%-1% biological enzymes and 0.3%-0.5% plant hormones for 8-12 hours; Soil improvement: A 5-10cm thick layer of organic fertilizer and salt-alkali-tolerant microbial agent mixture is laid on the surface of saline-alkali land. The organic fertilizer is a mixture of composted seaweed residue, shrimp shell powder, and livestock manure in a mass ratio of 2:1:

1. The seaweed residue is rich in various marine bioactive substances. The salt-alkali-tolerant microbial agent contains Bacillus, actinomycetes, and yeast in a mass ratio of 3:2:

1. It is used to reduce soil salinity and improve the soil microbial community structure. Sowing: Use a precision seeder to sow the pre-treated seeds in rows at a density of 50-80 seeds per square meter, with a sowing depth of 3-4 cm and a row spacing of 5-10 cm; Irrigation management: Utilizing an intelligent irrigation system, the irrigation volume and frequency are automatically adjusted based on real-time data from soil moisture and salinity sensors. The irrigation water source is desalinated seawater treated by a solar distillation device or clean water from natural river wetlands. Its conductivity is controlled at 0.5-1.5 dS / m, and its pH is adjusted to 6.5-7.

5. During the irrigation process, drip irrigation is alternated with micro-sprinkler irrigation, with drip irrigation applied 2-3 times daily for 10-15 minutes each time, and micro-sprinkler irrigation is applied once every 3-5 days for 30-45 minutes each time. This ensures uniform soil moisture and prevents soil salt accumulation, while also ensuring that the irrigation process does not damage or pollute the natural wetland environment. Growth regulation: During the seedling stage, growth stage and flowering stage of the saltwort, a nutrient solution containing specific biostimulants is applied respectively. The nutrient solution is prepared with extracts of degradable organic matter around natural river wetlands, and its composition and application dosage must ensure that it will not cause pollution to the natural wetland environment. The nutrient solution during the growth stage contains 0.15%-0.25% urea, 0.1%-0.2% potassium dihydrogen phosphate and 0.05%-0.1% potassium sulfate. The nutrient solution during the flowering stage contains 0.2%-0.3% boric acid, 0.1%-0.2% ammonium molybdate and 0.05%-0.1% zinc sulfate.

2. A method for planting Suaeda salsa in saline-alkali land according to claim 1, characterized in that: In the seed pretreatment step, the pH value of the mixed solution is adjusted to 5.5-6.5, and a small amount of oxygen is continuously introduced during the soaking process, with an oxygen flow rate of 0.1-0.2 L / min to maintain the redox potential of the solution, promote the physiological metabolic reactions in the seeds, and improve the vitality and germination potential of the seeds.

3. A method for planting Suaeda salsa in saline-alkali land according to claim 1, characterized in that: In the soil improvement step, before laying the mixture of organic fertilizer and salt-alkali tolerant microbial agent, a new type of soil loosening machine is first used to deep loosen the saline-alkali land to a depth of 30-40 cm. At the same time, expanded perlite accounting for 10%-15% of the soil volume is mixed into the soil to increase the soil's air permeability and water permeability and improve the soil's physical structure.

4. A method for planting Suaeda salsa in saline-alkali land according to claim 1, characterized in that: During the sowing step, the precision seeder is equipped with a seed monitoring sensor that can monitor the sowing quantity and position of seeds in real time, and automatically adjust the sowing speed and sowing amount through an intelligent control system to ensure sowing uniformity and accuracy.

5. A method for planting Suaeda salsa in saline-alkali land according to claim 1, characterized in that: In the irrigation management step, the intelligent irrigation system also includes a rainwater collection device and a reclaimed water reuse system, which can collect, filter and store reclaimed water generated by rainfall and production and life, and mix it with seawater desalination water or clean water from natural river wetlands in a certain proportion for irrigation. At the same time, the irrigation system is equipped with salt ion selective electrodes, which can monitor the salt content in the irrigation water in real time and automatically adjust the salt concentration of the irrigation water according to the dynamic changes in soil salinity, so as to achieve precise irrigation and salt regulation. In addition, during the entire irrigation process, a buffer isolation zone is set up around the wetland and a closed transmission pipeline is used to avoid damage or pollution to the natural wetland environment.

6. A method for planting Suaeda salsa in saline-alkali land according to claim 1, characterized in that: The method is controlled by an intelligent monitoring and control system. The system collects soil, climate and plant growth data in real time through multiple sensors installed in the field, and transmits the data to a central control unit. The central control unit processes and analyzes the data using big data analysis and artificial intelligence algorithms, establishes a Suaeda salsa growth model and a soil salinity dynamic change model, and automatically controls agronomic measures such as irrigation, fertilization, and sowing based on model prediction results, thereby achieving precise planting and intelligent management.

7. A method for planting Suaeda salsa in saline-alkali land according to claim 1, characterized in that: An ecological protection barrier is set up around the salsa salsa planting area. The barrier consists of a multi-layer structure, including an outer windbreak and sand fixation net, a middle layer of salt-alkali tolerant plant hedges and an inner layer of microbial agent spraying belt. The salt-alkali tolerant plant hedges are made of plants such as salsa salsa, halophyte and salt horn grass, which are mixed in a ratio of 2:1:1, with a row spacing of 1m and a plant spacing of 0.5m to form a dense plant barrier. The microbial agent spraying belt sprays a layer of salt-alkali tolerant microbial agent with a thickness of 0.5-1cm on the surface every 2-3m.

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