2025.08.29
I. Why is it scientific? — Mechanism and Benefits
1. Scientific Energy Production:
Unique Natural Resources: Desert regions have low rainfall, frequent sunny days, long sunshine hours, and high solar radiation intensity, making them the world's richest regions in solar energy resources. Building photovoltaic power plants here offers high power generation efficiency and is the most efficient use of natural resources.
2. Scientific Desertification Mechanism:
Shading Effect, Reducing Water Evaporation: Large solar panels act like a "sunshade" for the surface, effectively reducing direct evaporation from the soil and creating favorable conditions for the survival of plants below and between the panels.
Windbreak and Sand Fixation, Improving Microclimate: The photovoltaic panel array itself forms an artificial barrier, reducing surface wind speed, effectively reducing wind and sand activity, and preventing the movement of sand dunes. Condensation (dew) on the panels also increases soil moisture.
The "on-panel power generation, under-panel planting" ecological model: This is the core concept. Planting drought-tolerant, shade-loving economic crops (such as desert shrubs, forage grasses, and traditional Chinese medicine) beneath photovoltaic panels creates a virtuous cycle:
Plant growth -> Roots fix sand -> Reduce dust (dust can cover photovoltaic panels and affect power generation efficiency).
Plant transpiration -> Increased air humidity -> Further improvement of the local microclimate.
A perfect combination for water-saving agriculture: The biggest limitation for developing agriculture in desert areas is water. PV power stations can electrically drive efficient, water-saving irrigation systems like drip and percolation irrigation, enabling precise watering of plants and significantly improving water resource utilization.
II. Successful Practices
This concept is not just a fantasy; it has already been successfully implemented in China:
1. Kubuqi Desert Model: A large-scale photovoltaic desertification control project has been established in the Kubuqi Desert in Inner Mongolia, China. This has achieved a three-dimensional industrial model of "on-panel power generation, under-panel planting, and between-panel livestock farming." Not only does it generate enormous amounts of green electricity, it also successfully stabilizes sand and creates green areas, cultivating crops like licorice and alfalfa, and raising poultry like sheep and chickens, generating considerable ecological and economic benefits.
2. Taratan Photovoltaic Park in Qinghai: Originally a severely desertified wasteland, after the construction of the photovoltaic park, vegetation coverage within the park has rapidly recovered due to the shading effect of the photovoltaic panels. To prevent overgrowth of weeds that could impact power generation, the park even introduced "photovoltaic sheep" to graze, creating a fascinating "grazing-solar complementarity" effect.
III. Challenges and Precautions
Although scientific, implementation presents numerous challenges and requires scientific planning:
1. Water Resource Issues: While water conservation is recommended, initial planting and maintenance still require water. It is necessary to find a nearby water source (such as groundwater or water diversion from a distance) or to vigorously develop rainwater harvesting technologies, while carefully selecting highly drought-tolerant plants.
2. Dust Coverage: Desert winds and sand are strong, and photovoltaic panels easily accumulate dust. Regular cleaning is necessary, otherwise power generation efficiency will be severely affected. This increases operation and maintenance costs and water consumption (typically using sweepers or drone-based dry cleaning technology).
3. High Temperature and Sand Erosion: Deserts experience large temperature swings between day and night, and wind and sand activity can wear down the surface of photovoltaic panels and support structures, placing higher demands on the durability and reliability of the equipment.
4. Investment and Cost: Initial construction costs and transmission costs (deserts are often far from power load centers) are high, requiring strong financial and policy support.
5. Ecological Assessment: Whether large-scale land cover changes will have unknown long-term impacts on the already fragile local ecosystem requires a rigorous environmental assessment.
Conclusion
Using solar panels to generate electricity for desertification control is a highly scientific and intelligent approach with enormous potential. It cleverly combines human energy needs with the challenges of ecological restoration, turning a potential problem into a benefit, achieving the "triple benefit" of:
l producing green energy (power generation);
l improving the ecological environment (sand fixation and greening);
l creating economic value (planting and animal husbandry);
This represents a key direction for future sustainable development and ecological governance, and is a perfect example of "harmonious coexistence between man and nature." With the advancement of technology (such as more efficient photovoltaic panels, intelligent operation and maintenance robots, and more water-saving irrigation technology) and the reduction of costs, this model will become increasingly valuable for promotion.
Keywords：
Sun Earth Solar, Ningbo Sun Earth, Sun-Earth, Sun Earth, solar panels
