The use of seed fertilizer for seed fertilizer refers to the application of fertilizers near or in combination with seeds when sowing or planting. Appropriate application of fertilizer can meet the needs of crops for nutrients as early as possible, and can also save top-manufacturers. Improper application of seed fertilizers will directly harm the seeds, resulting in reduced production or even no harvest. When applying fertilizer, pay attention to the following points: 1. Do not choose fertilizers with a corrosive effect. Ammonium bicarbonate, ammonia water is volatile and corrosive, easily smoked seeds and seedlings, superphosphate contains free acid and phosphoric acid, the seeds Germination and seedling growth can cause injury and should not be used as a fertilizer. These fertilizers are generally applied under the seeding ditch or separated from the seed by a certain soil layer, or the calcium superphosphate is mixed with the earth fertilizer and applied. 2. Fertilizers that are not selected to have a toxic effect During the growth of crops, a small amount of biuret is often produced. If the content of biuret exceeds 2%, it will poison the seeds and seedlings. In addition, urea molecules with a high nitrogen content penetrate into the protein molecules of the seed, denature the protein, and affect seed germination. 3, do not choose fertilizers containing harmful ions, such as potassium chloride, ammonium chloride, etc., containing chloride ions, applied to the soil will produce water-soluble chloride, adverse to seed germination and seedling growth, ammonium nitrate, potassium nitrate, etc. Nitrate ions have an effect on seed germination. 4, do not choose strong alkaline fertilizer potash potassium fertilizer, steel slag, phosphate fertilizer and other alkaline fertilizers are not suitable for seed fertilizer. Potash ash potash contains more calcium, strong hygroscopicity, and becomes mature lime after absorbing water, releasing a lot of heat and easily burning out seeds and young roots. When it is used as a fertilizer, it must be mixed with organic fertilizer and applied into the sowing ditch. Reseeding the cover soil can avoid hazards. 5, do not choose unfamiliar farmer's fertilizer commonly used in rural areas such as manure, manure and other farmyard manure as a fertilizer, if not decomposed, applied to the soil after fermentation, will release a lot of heat to burn the root system, the release of ammonia burns seedlings. Therefore, the farmyard manure must be fermented by high temperature and fermented, and fully matured before it can be used as a fertilizer. Excerpted from China Agricultural Press>
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