How to choose the rational fertilizer

1. Non-corrosive fertilizers are selected. For example, ammonium bicarbonate and ammonia water are volatile and corrosive. They are easy to smear seeds and seedlings. Superphosphate contains free sulfuric acid and phosphoric acid, which can cause damage to seed germination and seedling growth. It is generally not suitable for seed fertilizer. Such fertilizers can be applied under the seeding ditch or separated from the seed by a certain soil layer, or mixed with superphosphate and soil fertilizer.

2 , do not choose toxic fertilizers such as urea often contain a small amount of biuret components, toxic to seeds and seedlings. In addition, urea molecules with high nitrogen content penetrate into the protein molecules of the seeds, denature the proteins and affect seed germination.

3. Fertilizers that do not contain harmful ions such as potassium chloride or ammonium chloride contain chloride ions, which will produce water-soluble chlorides when applied to the soil, which is detrimental to seed germination and seedling growth. The nitrate ions contained in fertilizers such as ammonium nitrate and potassium nitrate also have an effect on seed germination.

4 , do not choose unfertilized farmyard manure in rural areas commonly used manure, human waste water to do seed fertilizer, if not mature, release a lot of heat in the fermentation process easy to burn root system, release ammonia gas to burn seedlings. Therefore, the unfertilized organic fertilizer should not be applied. After the high temperature fermentation of the pile, it can be used to make the fertilizer after fully decomposing.