Due to the long-term use of chemical fertilizers and pesticides in agriculture in China, the ecological balance of soil microorganisms has been seriously damaged, resulting in the bad consequences of "increasing fertilizer without increasing production, pesticides killing pests and diseases"; In particular, the problem of high residues of chemical fertilizers and chemical pesticides on economic plants such as fruits and vegetables is quite prominent, and people are almost in an embarrassing situation of "talking about the discoloration of fruits and not daring to eat vegetables". If the soil is acidic, it is not conducive to microbial growth; It is impossible for chemical pesticides and fertilizers to decompose residual toxins and non-ferrous metals in soil. In 2007, only 7.2% of the paddy soil sampled by Jinhua Soil and Fertilizer Station had a pH ≥6.5. The soil pH of fruits and vegetables is ≥ 6.5, which is 7.9%. According to the investigation, in some famous agricultural and sideline products, the detection rate of organophosphorus was 100%, and the detection rate of bhc was 95%, exceeding the standard by 2.4%. In 2005, Zhejiang Tea Import and Export Corporation signed a contract with Japanese businessmen to import 2 tons of tea produced in a certain district of Jinhua City. After being sent to the Ministry of Agriculture for testing, the residue of fenpropathrin pesticide was 0. 12 (standard was 0.02). The manufacturer said, "The tea garden has not applied pesticides, and the fertilizer applied is urea, but pyrethroid pesticides have been sprayed in previous years." It shows that the unreasonable use of pesticides and fertilizers will eventually lead to the crisis of agricultural and sideline products.
It is disturbing that the effects of many low-concentration toxic pollutants are chronic and long-term, which may last for years or even generations. It is precisely because of the residues of chemical pesticides and fertilizers in the soil that diseases such as terminal illness and stroke have become the number one enemy of mankind. As long as we all purify the soil and realize the unreasonable use of chemical pesticides and fertilizers and the threat to human health, we can prevent it from being threatened; As long as we all purify the soil, we can not only improve the soil properties, reduce the use of chemical fertilizers and chemical pesticides, but also reduce the cost of agricultural investment; It can not only reduce the harm of continuous cropping obstacles, but also increase plant yield; It can not only improve the quality of crops, but also improve the soil environment of human beings and prevent and resist the threat of incurable diseases and strokes.