The invention relates to a floating
seedling raising method for sweet potato true seeds, and belongs to the technical field of sweet potato true seed
seedling raising.The method specifically comprises the steps that 1, a floating
seedling raising pond is built and filled with water; 2, 200-pore foam floating discs are selected and filled with a seedling raising matrix with the
water content of 60%; 3, the germinated sweet potato true seeds which are treated through 98% concentrated
sulfuric acid and subjected to hot water and agentia soaking treatment are selected to be seeded and covered with soil, the
soil surface is leveled, and the seeds are put into the seedling raising pond to be cultured; 4, water is supplemented for once every about 15 days during culturing; 5, seeding raising
fertilizer is applied for the first time 3-5 days after seedlings are neat, the application amount is 15 g / disc, the concentration of
nitrogen is kept to be 300 mg / L, and top dressing is performed for once every 7 days; 6, the seedlings reach the strong seeding standard after the seeds are seeded for 30-40 days and can be transplanted together with the soil.According to the floating seedling raising technique, quick and neat seedling emergence of the seeds can be promoted, the seedling emergence rate can reach 100%, the seedlings can be neat after emerging for 3-4 days, growth of the true seedlings can be kept consistent, the seedlings are strong, the root systems are developed, the root-top ratio is high, the
plant height is appropriate, and time and labor are saved in the whole process.