During direct rice seeding, uneven field surfaces, excessive soil covering, or heavy rainfall often lead to seed rot and germination due to waterlogging and oxygen deficiency. Calcium peroxide reacts with water to slowly release oxygen, forming a micro-oxidation zone around the seed, ensuring normal respiration and successful germination even in an oxygen-deficient environment. After treatment with calcium peroxide, seedlings exhibit advantages such as faster seedling emergence, higher germination rate, more developed root systems (more and longer roots), taller plants, and greater dry matter accumulation. This lays a solid foundation for cultivating strong seedlings. CaO2 can increase the soil's redox potential and improve soil aeration. This is beneficial to the activity of beneficial microorganisms in the soil and can activate nutrients (such as silicon) in the soil, thereby promoting the absorption and utilization of nutrients such as nitrogen, phosphorus, and potassium by rice roots. In arsenic-contaminated soil, the application of calcium peroxide can promote the formation of an iron film on the rice root surface. This iron film effectively adsorbs and fixes arsenic, thus preventing its translocation into the rice grains and significantly reducing the inorganic arsenic content in rice by 36.7%–60%.

In the rice-growing areas of southern my country, rice is generally sown by direct seeding or transplanting seedlings. The latter is gradually being phased out due to high labor costs. To improve labor efficiency, farmers in the south widely use direct seeding of rice. Direct seeding involves mechanically covering the rice seeds in the soil or directly broadcasting them onto the surface of the paddy field. The former, due to the moist soil, often leads to oxygen deficiency in the rice seeds, resulting in incomplete development or death (this problem can be solved by adding calcium peroxide coating agent before direct seeding). The latter, due to insufficient sowing depth, causes the seedlings' roots to be unable to hold the soil firmly, resulting in lodging or being washed away by the water flow.

To address the problems of oxygen deficiency and malnutrition in deep direct seeding, extensive research revealed that seed coating agents with calcium peroxide as the main component effectively solve these issues. By coating the seeds with a mixture of calcium peroxide and other fertilizers containing nitrogen, phosphorus, and potassium in varying proportions, the seeds can absorb oxygen slowly released from the calcium peroxide in the soil and also absorb different nutrients such as nitrogen, phosphorus, potassium, and calcium. Furthermore, because calcium peroxide has certain bactericidal properties, it enhances the disease resistance of seedlings, particularly improving the root system's resistance to rot and disease—a multi-benefit approach. Extensive field trials showed that crops coated with calcium peroxide experienced a 15-40% increase in yield, fruit yield a 10-25% increase, and fruit sugar content a 20% increase.

Therefore, the application of calcium peroxide in rice cultivation in my country is only just beginning to be recognized. With the increasing availability of different formulations based on calcium peroxide, its use in the production of various crops will become more widespread.