Poetry that rejects pesticides and fertilizers

Chemical synthetic substances such as fertilizers and pesticides can greatly improve agricultural production capacity, increase agricultural product output and bring more income to farmers. However, excessive use of chemical fertilizers and pesticides will not only cause food safety problems, but also pollute the land to varying degrees. The unreasonable use of pesticides and fertilizers leads to the increasingly serious pollution of agricultural cultivated land. The use of chemical fertilizers and pesticides in China accounts for more than 30% of the global total, and the utilization rate is too low, which leads to acidification, salinization and hardening of land and soil, resulting in the decline of soil fertility. Heavy metals, nitrates and other harmful substances pollute soil, even water and air, eventually destroying the ecological environment and leading to the decline of agricultural products quality.

The reason is: First, let's look at the main crop, wheat. Fertilization is mainly based on base fertilizer and topdressing. The time is in the stage of sowing and applying pesticide, and foliar spraying is mainly in the later stage of wheat growth. Weeding should be carried out at the 3-5 leaf stage of wheat and before jointing. So the four seasons can't be mixed together. Moreover, some pesticides mixed with chemical fertilizers will cause phytotoxicity to wheat. It is not recommended to use together. Look at corn again, when sowing, fertilization should be deeper, and herbicides should be applied on the soil surface to seal it. After emergence, herbicides should be used at the 3-6 leaf stage of maize seedlings. Otherwise, it will cause drug damage. At this time, because the seedlings are small, they are generally not topdressing. So don't use corn together It can also be seen that general crops are not suitable for mixing.

Pesticides and fertilizers have nothing to do with it and are not affected. Pesticides are generally applied to the surface of grass, and chemical fertilizers are mostly below the soil layer. Generally, not at the same time. In addition to spraying on weeds, pesticides generally have the function of sealing the soil surface. Therefore, it is best to fertilize first and then spray pesticides. Pesticides break the original ecological balance of the soil, kill pests and destroy some beneficial bacteria in the soil. The soil is forced to cultivate every year, and there is no fallow period to restore soil fertility. However, the use of chemical fertilizers is only a quick-acting drug and cannot be fundamentally alleviated. Therefore, some farmers will take turns farming every year instead of planting corn all the time, so that the soil can have a recovery period. Therefore, every time we use chemical fertilizers or pesticides, we should adjust measures to local conditions. The use of chemical fertilizers will harden the land. Can be used as farmyard manure, no pesticides, advocate ecological recycling agriculture, natural breeding, and plant good crops and healthy agricultural products with zero pesticide residues!