"Photovoltaic + fishery"
"Photovoltaic + fishery" refers to the construction of a photovoltaic power station with a base on the water surface, and the development of fishery under the photovoltaic panels while generating electricity. It is a multiple development model of the composite utilization of space resources. For aquatic products: first, the cooling and shading functions of photovoltaic modules can reduce the sleeping temperature of aquatic products, reduce water evaporation, improve the survival rate of fish, shrimp and crabs, and reduce the invasion of algae; second, the intelligent system powered by photovoltaics can effectively Control the conditions of the aquaculture water body, such as water temperature and pH; it can also realize water-saving circulation, bottom sewage discharge, sterilization and oxygenation and remote detection, creating a better ecological environment and continuously improving the output and quality of aquatic products. For power generation operation and energy saving and emission reduction: photovoltaic-driven fishery has zero pollution, reducing dust, carbon dioxide, sulfur dioxide, and nitrogen oxide emissions; surface photovoltaic power plants can also avoid damage to power plants caused by fires and animals biting cables. The simultaneous realization of fishery production increase and energy saving and emission reduction can greatly increase the economic value of land per unit area. 
Judging from the data of Jiangsu fishery-light integration project, the yield per mu of grass carp ponds with fishery-light integration reaches 35,550-39,705 kg/ha, which is much higher than the average level of local conventional ponds (18,750 kg/ha). 50% to 75% of the photovoltaic modules are installed on the 339 mu of breeding water, and a 10-megawatt fishery-photovoltaic integrated pond is built. A total of 13 million kWh of electricity is generated a year, and the annual power generation per mu is 38,300 kWh, and the average monthly power generation is 3196 kWh. Fish and vegetable (rice) symbiosis, using rice and water spinach for biological treatment, the cumulative total output of rice is 194.48 kg, the total amount of water spinach is 3529 kg, a total of 161.99 kg of nitrogen, 27.63 kg of phosphorus, and 202.44 kg of potassium are absorbed. The output value added was nearly 4,000 yuan, and the profit was more than 3,000 yuan. Utilizing the organic combination of physical, biological purification and aquaculture technology, we can "raise water with fish and purify water with grass", effectively control the problem of internal and external pollution in aquaculture, and the degradation rate of SS is over 80%, and that of COD and TN , The degradation rate of TP is more than 90%, and the water quality after purification meets the first-level standard of "Discharge Requirements for Freshwater Pond Aquaculture Water" (SC/T9101-2007). 
"Photovoltaic + Highway"
Roadside photovoltaic is a form of photovoltaic construction that uses land on both sides of expressways and railways to build photovoltaic power stations. The land along railways and highways is polluted by noise and exhaust all the year round. The agricultural economy in such areas is poor. If ground photovoltaic systems are built, land consumption and landscape intervention in other places can be reduced. 
There are a lot of narrow strip photovoltaic power stations on both sides of German highways. 12% of Germany's ground photovoltaic power plants are located within 110 meters of roads and railways. The potential for solar installations along 110 meters of Thuringia's 500-kilometer motorway totals 1.8 GW. Taking the Photovoltaik Kainzenstadelfeld project south of the B8 federal highway in Deggendorf, Bavaria, Germany as an example, its total area is about 20,000 square meters, the photovoltaic facilities cover an area of ​​13,992 square meters, and the number of photovoltaic panels is 2,829. The power generation is 1121.4 kWh, and the landscape compensation factor is 0.2 (Landscape Compensation: Federal Nature Conservation Law and Building Regulations point out "intervention activities on nature and landscape, that is, acts that affect the natural balance or the performance and function of the landscape"), The landscape compensation area is 2298 square meters. 
In addition, research in the United States has shown that the surroundings of solar modules are ideal places for planting pollinating plants, which have better planting effects and can also provide food and shelter for pollinators (such as bees). The establishment of a new habitat for pollinating insects will have a positive impact on the harvest near the photovoltaic power station, because the bees (insects) that settle in the photovoltaic power station will fly to the surrounding farmland, promote farmland pollination, and benefit farmers. Combining pollinator-friendly plants with roadside photovoltaics close to agricultural sites can create a “triple win” for clean energy, agriculture, and biodiversity.