What are the dangers of watering vegetables with domestic sewage?

Domestic sewage contains a certain amount of heavy metals, and the use of domestic sewage to water vegetables will accumulate heavy metals in vegetables, resulting in excessive heavy metal content. After people eat vegetables, metals are enriched in the body, and heavy metal poisoning will occur.

There are many pollutants in domestic sewage, and the land is polluted and difficult to recover when it is used for watering vegetables.

There are many domestic sewage that are difficult to degrade quickly in nature.

Watering the vegetables. substances, the smell is large, and some substances are difficult to degrade.

There is a lot of organic matter in domestic sewage, and at the right temperature, bacteria and algae will multiply, causing water pollution.

Sewage, especially industrial sewage, is more toxic. Vegetables grown with sewage watering the ground will be harmful to health if eaten for a long time, and it is easy to make people overweight and even metal poisoning. Sewage, garbage, feces, etc., are mostly non-toxic inorganic salts.

The used domestic sewage is used to water vegetables, which is first of all unhygienic, and at the same time, the vegetables also absorb unhygienic water and are not nutritious.

Some of the sewage in life is harmful substances, such as the water that has been washed cannot be watered, and it is easy to water the vegetables to death if they are watered. There is a substance in that water that harms the dish. The water used to wash the dishes can be used to water the vegetables.

Domestic sewage contains a lot of pollutants, and if it is absorbed by vegetables, it is definitely not good for health.

Domestic sewage is a natural medium for the growth of various bacteria and microorganisms, and many bacteria will be attached to it, such as E. coli, if people eat this vegetable that is not washed, it is easy to get sick.

The pollutants contained in domestic sewage are mainly organic matter (such as protein, carbohydrate, fat, urea, ammonia nitrogen, etc.) and a large number of pathogenic microorganisms (such as parasite eggs and intestinal infectious viruses).

The organic matter in domestic sewage is extremely unstable and easy to decay and produce foul odor. Bacteria and pathogens multiply in large numbers by feeding on organic matter in domestic sewage, which can lead to the spread of infectious diseases. Therefore, domestic sewage must be treated before discharge.

Domestic sewage watering vegetables.

Domestic sewage is treated and can generally be used for watering vegetables. Watering vegetables with domestic sewage can promote the growth of vegetables. Generally, domestic sewage contains cellulose, starch, sugar, lipoprotein and other substances, which can promote the growth of vegetables, so it is generally possible to water vegetables with domestic sewage that is not too dirty.

Method of watering vegetables with domestic sewage.

When watering vegetables with domestic sewage, they should be treated first, and some harmful substances should be disposed of before being used to water vegetables. In addition, when watering vegetables, they need to be watered evenly around their roots, and they cannot be watered directly at one time, which is not conducive to the absorption of nutrients by the roots.

Precautions for watering vegetables with domestic sewage.

Pay attention to the frequency and time of watering vegetables with domestic sewage. Generally, noon is more suitable because the temperature at noon is relatively high, which can promote the evaporation of water. If watered at night, it may cause water accumulation in the roots, which will affect the normal growth of the shrine vegetables.

However, it can also be watered at night in summer, because the high temperature in summer is conducive to the evaporation of water from the stool brigade.

The hazards caused by manure watering vegetables include root burning, insect pests, air damage, etc.

1. Root burning: manure is applied to the soil, after the vegetables are planted, with watering, the manure will gradually rot and close and release a certain amount of heat, resulting in root burning or seedling burning.

2. Insect pests: After manure application, due to incomplete decomposition, it may cause an increase in insect pests, such as more chicken lice in chicken manure, and a large number of slender white black-headed maggots will appear after bean surface is applied to the soil.

3. Gas damage: manure is slowly fermented and rotted in the soil, and some harmful gases such as ammonia or sulfur dioxide will be gradually released.

The reason why farmers still insist on using farmyard fertilizer

Nowadays, the use of chemical fertilizers has become widespread, but even if there are many types of chemical fertilizers. Farmers still choose to water vegetables with manure to replenish nutrients to the crops. This is because the nutrients of chemical fertilizers are relatively concentrated, and they can quickly produce fertilizer effects, but the corresponding fertilizer effect duration will be relatively short.

The application of farmhouse fertilizer can slowly supplement nutrients to vegetables, and the fertilizer effect lasts for a long time. By applying chemical fertilizer to the vegetables, the nutrients in the plot will be solidified, which will inhibit the absorption of nutrients by the vegetables. Farmers know that it is not possible to water vegetables directly with manure, and the manure used has to be fermented for a long time.

In the process of fermentation, the high temperature and the beneficial bacteria in the manure will be used to eliminate the harmful bacteria and parasites in the manure.

This is the reason why many farmers are still willing to use manure to water their vegetables. Long-term application of chemical fertilizers will not only speed up the rate of soil compaction, but also affect the planting environment and reduce the planting yield.

Water vegetables with domestic water.

Domestic water refers to the water left by people washing their faces, vegetables, and cooking in their lives. This water can be used to water vegetables. Watering vegetables with domestic water balance is conducive to the material cycle of the ecosystem and the return of nutrients to the earth, and is also conducive to the sustainable development of the land.

How to water vegetables with domestic water.

1.Fermentation treatment: Before watering vegetables with domestic water, they must be fermented first.

Put them in a sealed plastic bottle, and then expose them to the sun for about half a month, and you can decompose them. 2.Dilute with water:

After fermentation, dilute with water in a ratio of 3:7, do not do not touch the leaves of the plant, otherwise the acid content in the water is high and it is easy to burn the plant.

Precautions for watering vegetables with domestic water.

1.Domestic water should also be classified, such as washing vegetables, washing rice, and flushing toilets, which can be directly used to water vegetables. However, wastewater containing chemicals, such as washing clothes and dishes, cannot be used to water vegetables, so special treatment is required.

2.Domestic water can breed all kinds of bacteria. Be sure to disinfect it before use to prevent people from getting sick after eating the vegetables watered with it.

This hazard is as follows:1. First of all, bath products in bath water may contain chemicals, such as spices, preservatives, etc., which may pose a potential threat to human health if these substances enter the soil and plants.

2. Secondly, the dirt and cells in the bath water may become nutrients for bacteria and viruses, leading to the breeding of bacteria and viruses, making crops infected with diseases and reducing crop yield and quality.

3. Bath water may also contain copper, zinc and other metal elements, if excessive, it will also cause adverse effects on crops.

It is not recommended to use bath water for watering vegetables, it is best to use clean fresh water or rainwater to water plants.