Sources: All information stated in this article is based on reliable information, and is summarized at the end of this article.
Pick "convenient" fertilizer, and the dishes will grow greener and greener.
Obviously there is chemical fertilizer, why do farmers still choose to choose "convenient" fertilizer? Is it true that vegetables that have been applied with manure and water cannot be eaten?
Dung watering vegetables is not a moment
Hoarding manure and applying water and fertilizer, but since before the birth of "chemical fertilizer", it is the consensus of all families to choose "manure" as fertilizer, and even have a clear understanding of when to hoard manure.
It can be said that since ancient times, this manure fertilization has been commonplace, and the reason is not anything else, that is, because the manure contains nutrients, including carbon, nitrogen, phosphorus, magnesium, calcium and other nutrients needed by plants.
Either of these elements is beneficial for fertilizing the dish, but the plant absorbs it more slowly.
The excrement of this animal is fermented and decomposed to become fertilizer, and then sprinkled on plants, which has the characteristics of improving the soil, improving the vitality of soil nutrients, and purifying the soil ecological environment to ensure the high quality, high yield and high efficiency of vegetables.
Therefore, it is inevitable that "manure" will become necessary for fertilization.
In particular, the well-known Yunnan Pu'er organic tea is made from wild elephant dung to feed a steady stream of tea.
Since it has been planted for a long time, why does this start to highlight that this "manure fertilized vegetable" cannot be eaten?
Since it is fertilized with manure, the first thing that bears the brunt is the pungent smell.
Fertilizers also know that this manure is the best raw material for fertilization, but with the development of society and the establishment of high-rise buildings, this "manure" in residential buildings to grow vegetables will also affect daily life.
In 2018, a resident in Wuhan, Hubei Province, still used manure to water fertilizer, which filled the whole building with a foul smell, and the owner complained bitterly.
In 2022, the owner of a community in Ganzhou also encountered this situation, encountering a neighbor who used manure as fertilizer to grow vegetables, but it caused the community environment to stink.
Therefore, in recent years, "manure fertilization" has become an explicit prohibition in many areas.
And this taste is only one of them, with the advent of chemical fertilizer, the behavior of picking manure and fertilizing has been criticized by many people, and the remarks that the vegetables watered with manure can not be eaten are also very popular.
The most direct reason is "unhygiene".
Is it true that this plant, which has always been watered with dung, cannot be eaten?
Are manure-watered vegetables safe?
The reason for such remarks is that in addition to the greater smell brought by manure fertilization, the feces contain harmful pathogens, which not only affect the quality of the environment, but also affect the adverse reactions caused by human eating.
Therefore, the remark that "manure-watered vegetables" is unsafe has also begun to arouse people's thinking as the fertilization of vegetable plants becomes more efficient and convenient.
But if the vegetables that have been watered with this manure are not safe, then it doesn't make sense how the farmers used to fertilize the vegetables from generation to generation.
But in fact, there are certain misunderstandings that vegetables watered with manure are unsafe.
The vegetables that have been watered with this manure are not safe, and it depends on whether the manure is fermented.
To be precise, if fermented manure is poured on vegetables, the likelihood of virus residues is low.
However, if it is fresh and unfermented manure, the viral substances contained in the fresh manure will remain on the dishes, and if such dishes are marketed and circulated in the market, health risks are inevitable.
Unfermented manure water will contain a large number of harmful substances such as bacteria, germs, and insect eggs. But this fermented manure is different.
Academician Zeng Yi said that after fermentation, the decayed manure water can provide more nutrients.
In general, in order to keep the fruits and leaves full, the basic water will be poured on the roots of the vegetables when watering the manure.
And the vegetables that have been watered by the decaying manure can generally be eaten after waiting for more than ten days.
Therefore, it is not a problem to water vegetables with manure water, but the problem is to water vegetables with unfermented manure water, and the health problems caused by it are one after another.
Of course, the emergence of a large number of chemical fertilizer types, such as organic fertilizers, etc., is more targeted for watering vegetables.
If in terms of crop quality, fermented manure is more conducive to the fertility of crop soil, then from an environmental point of view, professional fertilizer is more suitable for the current choice.
However, in terms of production costs, manure can be obtained directly from poultry and other breeding, and the cost will be relatively low, so some experts call for a complete ban on manure fertilization is not entirely in line with farmers' habits.
After all, manure irrigation has its "long-term" reason, but it is necessary to distinguish that fresh manure water is not feasible, and fermented manure water is feasible.
Resources:
Manure fertilization, property owners can't stand this wave of operations! -- The Paper
Obviously there are chemical fertilizers, why do farmers still use manure to grow vegetables? -- The Paper
Residents grow vegetables in the corridor and fertilize with manure Neighbor collapse: permeated with a foul smell - Global Network
To solve the environmental problems caused by livestock and poultry manure, Jiangsu has a new way! -- CNR
In the spring season, the price of fertilizer continues to rise, farmers use homemade "soil fertilizer", and animal manure on farms is sold out in advance - China Times