(1) Leading to the deterioration of soil properties

When single-element chemical fertilizers are applied in large quantities on farmland, their nutrients cannot be effectively absorbed and utilized by crops, and some chemicals such as nitrogen, phosphorus, and potassium are easily absorbed by crops. The soil consolidates and forms various chemical salts, which accumulate in the soil, causing imbalance in soil nutrient structure and deterioration of physical properties. In some plots, harmful metals and harmful bacteria exceed standards, leading to deterioration of soil properties. Long-term excessive application of nitrogen fertilizer will also cause the loss of calcium, magnesium and other elements, causing continued acidification of the soil and ultimately loss of productivity.

(2) Leading to a decrease in product quality

The partial application of certain chemical fertilizers can lead to crop nutritional imbalance and hinder the transformation and synthesis of some substances in the body, resulting in a decrease in product quality. For example, today's fruits don't taste sweet, vegetables don't taste delicious, and they are easy to rot and cannot be stored. The reasons are all due to excessive use of chemical fertilizers.

(3) Leading to environmental pollution

Due to the application of too much chemical fertilizers, soil water-soluble nutrients and other substances are leached into groundwater and rivers by rainwater and farmland irrigation, causing pollution in some areas The pollution of groundwater and rivers has caused eutrophication of groundwater, rivers and lakes, making groundwater unpalatable and fish and shrimp in some rivers and lakes often dying.

(4) Leading to an increase in production costs

First, due to factors such as the level of farming and crop fertilizer requirements, crops cannot obtain high yields; second, due to excessive The application of a single type of fertilizer on the ground results in nutritional imbalance and imbalance, which only increases costs without increasing yields. It also causes low-quality agricultural products that are difficult to sell or have low prices, which brings losses to farmers.