Chapter 225: Soil Pollution
Mentioning this point, Teacher Chen felt particularly sad.
It’s not just these few acres of land that will cause serious consequences, but there are many similar destroyed lands in China.
The total sum is a figure that should not be underestimated, and the food that these lands can produce can fill the bellies of many Chinese compatriots!
However, this group of people is incompetent. It has been so long. Not to mention the solution, they have not figured out the cause of this problem.
I can only watch this land being empty.
Every time he came and saw it, he felt extremely heartbroken.
Xu Wanning probably knows the real reason.
It was learned in the textbooks of later generations.
But how to explain it in a way that is easy to understand and does not arouse suspicion is a more difficult problem.
After thinking for a long time, Xu Wanning came up with a more reliable method.
"Mr. Chen, I have an aunt in my family. She and my uncle are both professionals in the technical industry, and we have a lot of books at home. I vaguely remember that I have seen something about this in a book before, but for the time being, I I can’t remember it. I’ll think about it later, write down everything I can think of, and then tell you in detail.”
“But you can’t tell other teachers about this, after all…”
The second half. Xu Wanning didn't say it clearly, but Teacher Chen understood what she meant.
"Don't worry, I won't say another word."
Walking further, we reached the place where greenhouse vegetables are cultivated.
Teacher Chen opened one of the curtains and planned to take Xu Wanning in to take a look.
But as soon as she stepped through the door, Xu Wanning couldn't stand the smell inside and quickly backed out.
In just a few seconds, she felt as if she was about to suffocate. The complex flavors of various ingredients blended together, and even just one breath would make people feel uncomfortable all over.
It's not that she is too pretentious.
Teacher Chen smiled: "Most of the people who come here for the first time have the same reaction as you. But you have to adapt as soon as possible. After all, our daily life will be dealing with these greenhouses."
"I understand, Teacher Chen, what are you doing? " I'll definitely get used to it soon if I give it some time."
After crossing the greenhouse, we continued walking forward and arrived at the living area.
Xu Wanning was assigned to a separate dormitory. It was not large and contained not many things, but it was relatively tidy and had all the necessary daily necessities.
There is a washroom at the end of the corridor where you can also take a shower.
Overall, the living environment is much higher than that of school dormitories.
"You should rest for a while and organize the things you brought. Let's have dinner at 1:30. After dinner, we will have a simple meeting. You must attend."
"I understand, Teacher Chen."
Xu Wanning said After putting away the things I brought, I took out a pen and paper without taking a break, sat down at the table and started writing down soil management methods.
According to her judgment, the land that was barren of grass and grass she just saw became like that because its soil was polluted.
The four main forms of soil pollution are the loss of soil aggregate structure, soil acidification, soil salinization, and excessive soil heavy metals.
Xu Wanning has no experimental data and cannot determine which type it belongs to, but what can be ruled out is soil acidification and excessive heavy metals.
Soil acidification mainly occurs in the southern region and is mostly related to the rainy weather in the south. After acid rain combines with certain substances in the soil, it will accelerate the loss of soil minerals. As a result, the soil becomes nutrient-poor.
As for excessive heavy metals in the soil, there is no need to consider it. A large amount of chemical fertilizers must be used, which will lead to improper coordination of large, medium and trace elements in the soil, and some of them will be deposited in the soil, affecting the soil's permeability.
Xu Wanning tentatively concluded that it was soil salinization based on his superficial understanding and speculation about the local area.
In northern areas, groundwater rises to the surface. Due to poor drainage, after the water evaporates, salt will be formed on the surface and remain on the surface of the soil. In this way, it will affect the air circulation and flow in the soil, which will affect the absorption of crops.
This situation almost always occurs in some northern areas, but the degree of severity is different.
This situation is also commonly known as "burned out".
Xu Wanning had just written down these information when a female teacher who was traveling with her came knocking on her dormitory door.
"Wanning, it's time to have lunch. Have you packed it up?"
"Teacher Jin, I'll be out right away."
Xu Wanning put the pen cap on and glanced at the paper full of words. When she saw that there were no problems, she put the paper away. Fold it and go out immediately.
The lunch was relatively rich, with one meat and two vegetables, and two rice dishes. It was enough,
but the taste was average. The dishes were probably not made by the same chef, and were either too salty or too bland.
"Our place is relatively private, so we can only do the eating and cleaning by ourselves. We are really not good at cooking. As long as the food we make is cooked and edible, it doesn't matter whether it tastes good or not. , There is really no way to guarantee it, so I have to force you to follow us and eat."
That's it!
Xu Wanning suddenly realized.
She waved her hands repeatedly: "No grievance, no grievance. But I am also a member of our team, and I can also cook."
Teacher Jin explained with a smile: "You are new here, and you are not familiar with the environment here. We always I need to give you an adaptation process. Don't worry, we will definitely arrange for you to cook in a few days."
Xu Wanning glanced at the not-so-large cafeteria and saw several teachers . When eating, I gulp it down, as long as it fills my stomach. As for the taste...if
you eat it quickly, you won’t be able to taste it.
Dealing with land, vegetables and various data every day is already very hard. If you are not satisfied with eating, that would be too pitiful.
Anyway, since she just arrived, important things will not be handed over to her. At best, she will just watch and learn from the sidelines, or do some tricks.
Therefore, Xu Wanning bravely suggested: "I'm not bad at cooking. How about I cook in the afternoon?"
"Then the relationship is good, but I have to work hard for you."
"It's not hard work, that's what I should do."
After dinner, Xu Wanning followed Teacher Jin to the conference room.
In addition to the seven teachers who came with him, there were several outsiders in the conference room, all of whom Xu Wanning had never seen before.
Seeing her confused look, Teacher Jin explained: "These teachers are also members of our research group. They are from other schools and their focus is different from ours. Our main focus is on the cultivation of vegetables in greenhouses. Teacher Chen and Sun The teacher studied the empty land with them. "