Planting and care products
Six-step integrated three-dimensional improvement method for saline-alkali land
Achieving sustainable improvement through "using grass to cultivate land and using grass to promote production"
Against the backdrop of the in-depth advancement of ecological civilization construction during the "14th Five-Year Plan" period and the accelerated implementation of "dual carbon" goals, large-scale cultivation of Arundo donax is becoming a key approach to solving the problem of soil pollution control. From saline-alkali land improvement to rural industrial revitalization, from biomass energy development to carbon sequestration and emission reduction, Arundo donax, with its dual attributes of "ecological restoration + economic transformation", has opened up a sustainable development path for China's ecological governance.
Polyploid Arundo donax, trade name "Green Oasis No. 1", is a new type of energy plant cultivated by Redsun researchers using gene editing, synthetic biology and other technologies. In North China, the yield of dry matter during the high-yield period can reach 4 tons or more per mu. "Green Oasis No. 1" is cold-resistant and salt-alkali-tolerant, and its growth is not affected in saline-alkali soil with a salt content of less than 5‰. It can safely overwinter at -20°C in the north. It can be planted in areas north of 42° latitude, below 1000 meters above sea level, with annual rainfall greater than 500 mm, and can be continuously harvested for 20 years after a single planting. As a highly adaptable perennial herbaceous plant, Arundo donax, due to its well-developed root system, large biomass, and ability to accumulate heavy metals, has become a natural "ecological guardian" for soil remediation.
Redsun New Energy, with Arundo donax cultivation as its core, integrates independently developed desalination agents, soil improvers, microbial agents, and organic fertilizers. Based on its mature practical experience of "irrigation and drainage, salt control and alkali treatment, and using grass to cultivate land", it has pioneered a six-step integrated three-dimensional improvement method. This engineering system fully utilizes the biological, chemical, and physical reaction mechanisms of nature, coupling traditional improvement technologies such as land leveling, soil improvers, deep plowing, ridge shaping, and field irrigation and drainage. It can effectively achieve comprehensive management of saline-alkali soil, and can also be extended to the treatment of desertified land and the restoration of abandoned mines, solving the pain points of high cost and long cycle of traditional methods, and truly achieving sustainable utilization of land resources in situ.
The technical process flow is as follows:
Step 1: Land leveling
Remove surface weeds, debris, construction waste and other obstacles, and carry out earthwork balancing according to local conditions.
Step 2: Application of soil improvers
Analyze the soil's physicochemical properties, and according to the soil salinization, alkalization, acidification, and nutrient levels, use desalination agents, microbial agents, soil improvers, and organic fertilizers. All of these products are independently developed by the company, making them more economical and environmentally friendly. They can quickly reduce salt damage, neutralize soil alkalinity, and adjust the pH.
Step 3: Deep plowing
Use machinery to deep plow the land, playing the role of turning over, loosening, mixing, and breaking up the soil, allowing the soil improvers to fully contact the soil, thereby loosening the soil, activating the soil layer, improving the soil structure, and enriching the land.
Step 4: Ridge shaping
According to the distribution characteristics of soil salinization and alkalization, set up micro-topography on the deep-plowed land to reduce or eliminate the phenomenon of salt, acid, and alkali returning from the lower soil or groundwater to the improved soil layer.
Step 5: Field irrigation and drainage
Set up irrigation and drainage systems on or around the improved land, including irrigation and drainage ditches, pipelines, and pump stations. Large-scale planting can be equipped with an integrated intelligent water, fertilizer, and salt control system. Through the intelligent control system, it monitors changes in soil moisture, nutrient status, and salinity, achieving intelligent and precise control of irrigation, fertilization, and salt leaching.
Step 6: Planting Arundo donax
According to the soil conditions, set the planting density of Arundo donax, it is recommended 800-1200 plants/mu. Relying on the self-accumulation of cadmium, lead and other heavy metals by Arundo donax, and its salt tolerance mechanism, the goal of greening and improvement is achieved.
⊙Compared with other improvement methods in the same industry, this technology saves 50% of water and reduces the cost of improvement by 60% per mu;
⊙This technology has a wide range of applications and can achieve improvement of extremely heavy and heavy saline-alkali soil. According to practice, continuous planting of Arundo donax for three years can reduce soil salinity by 40%-60% and increase organic matter content by more than 30%, creating conditions for subsequent vegetation restoration;
⊙This technology can be used for the remediation of polluted soil;
⊙Arundo donax planting is a one-time investment, and the "using grass to cultivate land" improvement is more thorough and the effect is sustainable and stable;
⊙This technology has a high degree of intelligence and mechanization;
⊙This technology has its own economic benefits, and achieves diversified economic transformation through Arundo donax's "using grass to promote production";
⊙High-yield Arundo donax fixes 8-10 tons of carbon per mu, and carbon sink development can be achieved through carbon sink trading.
| Industry | Application Scenarios | Market Demand |
| Biomass Energy | Biomass pellet fuel, biomass syngas, biomass methanol, biomass aviation fuel, biomass hydrogen production, biomass diesel | Policy support, huge market |
| Biomass Manufacturing | Fiber materials (pulp, dissolving pulp), nanocellulose, plastic film, packaging, building insulation materials, activated carbon and carbon-based materials | Fast market demand growth, high added value of single products |
| Biomass New Materials | Polylactic acid, bio-based polyurethane, bio-based polycarbonate, bio-based bisphenol A, bio-based methanol, ethanol, butanol, dehydrogenation to polyolefins | Replace traditional fossil energy products, technology needs to be broken through |
| Food Chain Products | Green silage, fermented feed, mushroom sticks, winemaking, fertilizer | Mature market, stable demand |
Currently, the area of saline-alkali land nationwide is approximately 150 million hectares. Saline-alkali land is a general term for salt land, alkali land, salinized land, and alkalinized land, and can also be collectively referred to as saline soil or saline-alkali soil. Saline-alkali soils are mainly divided into five types: chloride salt soil, sulfate-chloride salt soil, chloride-sulfate salt soil, sulfate salt soil, and alkali soil. The harm of saline-alkali to soil is caused by 12 salts composed of 4 anions: Cl-, SO42-, HCO3-, and CO32-, and 4 cations: Na+, K+, Mg2+, and Ca2+. Among them, NaCl, Na2CO3 (natron), and Na2SO4 (Glauber's salt) are the most harmful.
In the actual utilization of saline-alkali land, salt stress is the main factor leading to the low survival rate of soil organisms. Therefore, reducing soil salinity is crucial. The new ameliorants used in the six-step combined three-dimensional improvement method are the key to improving saline-alkali soil, and can meet the sustainable needs of soil structure improvement, quality improvement and efficiency increase, and ecological balance.
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