Excessive application of phosphate fertilizer is harmful

Phosphorus deficiency in soil will result in slow growth of crops, short and thin, upright, few branches, and small leaves that are easy to fall off. Phosphorus fertilizer application on soil lacking phosphorus has a good effect on improving crop yield and quality. However, some friends who do not have enough knowledge about fertilizers will feel that the application of phosphate fertilizer has many benefits to the crop, so they will apply too much phosphate fertilizer. In fact, this will cause a lot of harm to the crop.

Leading to crop zinc deficiency, such as excessive application of calcium phosphate, will cause zinc and phosphorus to react, causing precipitation of zinc phosphate, which crops cannot absorb, and obvious symptoms of zinc deficiency will occur.

Excessive application of phosphate fertilizer will cause silicon deficiency in crops, which will cause the silicon element in the soil to be fixed and hinder the absorption of crops, resulting in a lack of silicon in crops, especially for those gramineous crops that like silicon, such as rice. .

The raw material for phosphate fertilizer to accumulate harmful elements in the soil is generally phosphate rock. Phosphate rock contains many kinds of impurities, including many harmful substances, such as lead, cadmium and other harmful elements. Especially cadmium is effective in the soil. , It is easily absorbed by crops, causing accumulation of heavy metals in crops, and further harming human health.

Causes the deterioration of the physical and chemical properties of the soil. Phosphate fertilizers such as superphosphate contain a large amount of free acid, and a large amount of application will cause the acidification of the soil. Phosphate fertilizers such as calcium-magnesium phosphate fertilizers contain about one-fourth of lime, etc. Too much application will cause soil salinization.

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