The frequent application of chemical fertilizers in water-soluble vegetable fields has many harmful effects, which affects the quality of vegetables and causes damage to the soil. Therefore, the amount of chemical fertilizer should be minimized and applied in combination with organic fertilizer. Here's why we can't use water-soluble fertilizers frequently for vegetables and avoid the harmful effects of water-soluble fertilizers.
Fertilizer-contaminated vegetables Long-term application of chemical fertilizers, especially the “nitrogen-based vegetables” produced by excessive nitrogen fertilizer, the edible parts such as stems and leaves are heavily polluted by nitrates, which will increase the nitrate content in vegetables by a factor of two. It is easily reduced to nitrite in the human body. Nitrite is a highly toxic substance that causes hypoxia in human cells. Long-term consumption of this kind of vegetables can cause children's mental decline and can induce cancer, which is extremely harmful. Therefore, in some developed countries, it is now clearly stipulated that nitrogen fertilizer vegetables are prohibited from being listed, so as to ensure the interests of consumers.
It is difficult to preserve the fresh vegetables produced by the fertilizers. It seems that the stems are tender and the leaves are fat. The uninformed people think that the quality is superior. In fact, the nitrate content of this vegetable exceeds the standard, and it is easy to mold and deteriorate during the storage and storage process, so that the content of toxic substances is high. increase. It has been determined that in the winter and spring storage process, the cabbage rot caused by the application of nitrogen fertilizer is more than 20% higher than the rot of the farmer's manure, and the nitrate content is also multiplied.
Therefore, vegetable land should be applied to the maximum extent of organic fertilizer or other non-chemical nitrogen fertilizer, instead of chemical nitrogen fertilizer, without affecting the normal growth and development of vegetables, try to use organic fertilizers such as ring fertilizer, chicken manure and various cake fertilizers, such as cottonseed cake, Non-chemical fertilizers such as rapeseed cake, bean cake and biological bacterial fertilizer replace chemical nitrogen fertilizer to prevent vegetable pollution, reduce the residue of water-soluble fertilizer and cause pollution and damage to the soil.