Ammonium bicarbonate (has volatile and corrosive, easily smoked seeds and seedlings), superphosphate (containing free sulfuric and phosphoric acids, which can cause damage to seed germination and seedling growth), urea (small amounts of biuret, If the content exceeds 2%, the seeds and seedlings will be poisoned.) Potassium chloride (containing chloride ions), ammonium nitrate, potassium nitrate (containing nitrate ions, toxic to the seed germination), unripe farmyard fertilizer (in During the fermentation process, a large amount of heat is released, the roots are easily burned, and ammonia is released to burn the seedlings. These are not suitable for seed fertilizers. Fertilizer to use nitrogen, phosphorus, potassium and three elements of the compound fertilizer, which nitrogen content should not be too high, otherwise it is easy to cause burning and burning seedlings. It is best to use long-acting slow-release fertilizers that are stable, such as 40% (26-8-6) intelligent zinc slow and controlled release fertilizer, 48% (26-10-12) stable compound fertilizer, 51% (31- 10-10) This will not only provide the nutrients needed for the growth of the seedlings at the seedling stage, but also ensure that the fertilizer will not be deferred later. How far apart is the seed fertilizer The concentrated application of chemical fertilizers to the roots will cause the salt concentration of the soil solution in the root zone to be too large and the osmotic pressure of the soil solution to increase, impeding the penetration of the soil moisture into the roots and causing damage to the crops due to lack of water. Fertilizers directly applied to roots, especially nitrogen fertilizers, can cause excessive absorption of nutrients by the roots, even if the concentration does not reach the level of “burnt†crops. The stems and leaves are prosperous and prone to disease, lodging, etc., resulting in reduced crop yields. Therefore, to keep the seeds and fertilizers more than 5 cm apart, it is best to reach 10 cm. How much fertilizer is suitable If the crop cannot be watered in time after sowing, the amount of seed fertilizer (ordinary ternary compound fertilizer) should generally not exceed 25 kilograms per mu, and when the crop is 5 to 7 leaves, 10-15 kilograms per acre is applied. If you can water in time, and ensure that the seed fertilizer interval more than 7 cm, the amount of fertilizer can reach 40 kg per mu. Dried Green Bean,Frozen And Dried Green Beans,Sliced Air Dried Green Beans,Freeze Dried Fd Green Beans Jiangsu Tiankang Food Co., Ltd. , https://www.tiankangfood.com