You should understand these common sense about seed fertilizers.

Fertilizer refers to fertilizer applied to or mixed with seeds when planted or planted. Appropriate application of fertilizers can meet the needs of crops for nutrients, and can save labor for topdressing; on the contrary, it will harm the seeds and cause losses. Therefore, when applying seed fertilizer, pay attention to the following points :

Do not choose a fertilizer with corrosive effects

Ammonium bicarbonate and ammonia water are volatile and corrosive , and easily smother seeds and seedlings . Superphosphate contains free sulfuric acid and phosphoric acid , which may cause damage to seed germination and seedling growth , and 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.

Do not choose toxic fertilizers

In the process of crop growth , urea often produces a small amount of biuret . If the content of the substance exceeds 2% , it will be toxic to seeds and seedlings. In addition, when a urea molecule with a high nitrogen content enters the protein molecule of the seed, the protein is denatured and the seed germination is affected.

Do not choose fertilizers containing harmful ions

Potassium chloride, ammonium chloride and other chemical fertilizers contain chloride ions. When applied to the soil, water-soluble chlorides are produced, which are detrimental to seed germination and seedling growth. Nitrate ions contained in fertilizers such as ammonium nitrate and potassium nitrate germinated on seeds. influential.

Do not choose strong alkaline fertilizer

Strong alkaline fertilizers such as ash ash potassium fertilizer and steel slag phosphate fertilizer are not suitable for seed fertilizer. The ash ash potassium fertilizer contains more calcium, has strong hygroscopicity, and becomes mature lime after absorbing water, which will release a lot of heat and easily burn out seeds and radicles. Must be used as a seed fertilizer, must be mixed with organic fertilizer, applied to the seeding ditch, and then planted with soil to avoid harm.

Do not choose unfertilized farmyard manure

In rural areas, manure and manure are commonly used as seed fertilizers. If the fertilizer is not ripe, a large amount of heat is released during the fermentation process, which easily burns the roots and releases ammonia to burn the seedlings. Therefore, the unfertilized organic fertilizer should not be applied, and it can be used as a seed fertilizer after being fermented at a high temperature and fully decomposed.

 

 

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