Now many crops need to use chemical fertilizers, which are synthetic chemical raw materials. These fertilizers are really unhealthy, and the creation of fertilizers is only one or two hundred years. Vegetable cultivation has a history of thousands of years in China. In ancient times, there was no chemical fertilizer. There is no problem for farmers to irrigate vegetables with organic fertilizer. Why is there a problem with irrigating vegetables with manure now?
Perhaps these experts think that manure is a dirty thing, and many bacteria and harmful substances will be detected, so vegetables watered with this manure will leave some bacteria or harmful substances, which is unhealthy.
But in fact, the manure used to irrigate vegetables in many rural areas is the product of fermentation. Many rural areas will have a cesspool, which will store feces and urine, and then after a long period of fermentation, it will become some organic fertilizer. These fertilizers may contain a lot of bacteria, but this kind of bacteria will not have much effect on vegetables.
When farmers water vegetables, they pour manure directly on the roots of vegetables instead of directly watering them. Moreover, when watering vegetables, there are not many. Only a little water is poured into each vegetable, so that vegetables can absorb these organic fertilizers. After the land is purified, many bacteria can be eliminated, so there is not much impact on vegetables.
On the contrary, vegetables watered with manure are actually real organic vegetables. These vegetables are far better than those grown with chemical fertilizers in both taste and happiness.
For example, vegetables grown with organic fertilizer in rural areas have a smoother taste and are very fragrant even without any seasoning. Nowadays, vegetables in many cities are grown with chemical fertilizers, which are hard and bitter, but they are not delicious.
In addition, the long-term use of chemical fertilizers to grow vegetables is actually not very friendly to the land. These fertilizers themselves contain many chemicals, which cannot be synthesized in the land. Long-term use of these chemicals will lead to the decline of land fertility, and these chemicals may also flow into rivers or other central areas with rainwater and other channels, resulting in greater pollution.
Therefore, we basically don't have to pay attention to those experts. The so-called irrigation of vegetables with manure is problematic. If they don't eat, naturally some people eat, and those who understand naturally understand. It is useless for people who don't understand to preach there.