The area from Xinmin to Baima has now become the research base of Xinmin Agricultural College. Although Cai Wuji is already the president of the Xinmin Research Institute, in addition to his daily work, he still finds time to wander around the original seed farms.

The Institute of Microbiology is very close to the cliff copper and iron mine, which was formed after the expansion of the original Biometallurgical Research Institute and the merger of biogas, edible fungi and other research institutes.

Genetic mapping was carried out mainly by the Institute of Microbiology and the Institute of Virology of the Medical College of Sandbank.

Medical schools have found that many pathogenic bacteria are not actually germs but viruses, and they believe that viruses mutate more quickly, so the main object of medical surveillance should be virus mutations. Some pathogenic bacteria are much less harmful, and it may be better to hand them over to the Institute of Microbiology.

The main research direction of the Institute of Microbiology has now shifted to the mechanism of symbiosis and mutual restraint between microbial populations.

The Environmental Research Institute is located in Luyuan Mountain, and the three research institutes are not far from each other, because their relationship is very close. Since the main drugs and extracts of TCM are extracted from plants, animals and microorganisms. So these three research institutes are all under the management of Cai Yuanpei.

"The air is not so pure." Researchers from the Institute of the Environment removed the sampling bottle from the air sampling unit at the environmental monitoring station. Seal it up.

"Air is a mixture, and its composition is very complex. The constant components are gases such as nitrogen and oxygen, which are almost unchanged and are mainly the result of various changes in nature compensating for each other. The variable components of air are mainly carbon dioxide and water vapor, and some very small components. It has been neglected for a long time because it is easy to destroy and difficult to detect. But it's these things that might really change the properties of the air. In general, they are various compounds secreted by animals and plants, and most of them are gases that convey information such as the maturity and reproduction of animals and plants. Many insects rely on this gas for their activities. Butterflies, dragonflies, bees. This is true for many microorganisms. The more species of flora and fauna there is in an area, the more this information gas is in the air. These gases are oxidative active substances, and we are studying what they can do for humans. ”

A girl from medical school said, "We noticed that this complex trace component in the air is very similar to the legendary aura. I used to sigh that the air here is spiritual, and that's probably what it meant. We don't have clear evidence of what kind of effect they have on the human body. But some of the studies and statistics we have conducted have shown that: The more complex the air, the more activated the body's immune system, such as lymphatic and other defense systems. But that's only one aspect. When it started. We were surprised by the results of sampling the immune system of the population in the North and the South, but it was later discovered that when the northerners came to the South, the immune system was also activated. caused the so-called water and soil adaptation, and then slowly converged with the surrounding people. In fact, it is true that the air and water are too different from north to south. ”

"Yes, some sensitive people even experience intense discomfort. and induce organic disease. Most of them are northerners after they arrive in the south. Conversely, after the southerners went to the north. The ability to adapt to the environment will be much faster. This is the result of excluding different altitudes. Another point. It's not just gases in the air, it's also microbes. The further south you are, the more microbes there are, and these microbes have a similar activation effect on the body's immune system. ”

"Speaking of which, southerners have a really hard life."

The young man who spoke did not have much sense of restraint, and was lively with a hint of seriousness.

"But because of this, the trained southerners have better overall abilities than the northerners. Not only in terms of physical strength, but also in terms of environmental tolerance. However, there are drawbacks. The researcher at the Institute of Environment, who had just begun to speak, said: "It is difficult for the weak to survive. ”

"Yes. According to the statistics of the medical school, the symptoms of the disease are generally more severe in southerners than in northerners. His body's immune system will put up a fierce resistance. If you have a physical defect, such as a congenital heart problem, the complications can be difficult to manage. Although the incidence is similar in the north and south, the mortality rate is much higher. The girl from the medical school frowned and said, "Some patients can be cured without a strong foundation. In particular, there were organic problems caused by long-term malnutrition and consanguineous marriages. ”

"But it's cheaper for the little guys, the little ones are in great health, nutritious enough, and the environment is good. We also found that people from different regions also had children who were married and had better health as they tolerated the environment. So we're promoting this notion of mate selection, and it's written into the textbooks. ”

This is Cai Wuji's summary.

A sixteen-year-old young man of Russian descent proudly held his head high and said to a girl: "Xiaoling, I am an excellent gene, don't let it go." ”

The girl named Xiaoling kicked him with a red face.

The young man laughed and ran away.

Xinmin Research Institute has been continuing the tradition of bringing the old to the new, emphasizing internship and research. There is also an emphasis on the tradition of interdisciplinary cooperation and collaboration. This is effective in ordinary discussions and dialogues, and many things will be bypassed.

Lizhi smiled and said: "Generally, this active substance is not easy to detect, how can you distinguish them one by one?" ”

The researcher at the Institute of Environment smiled bitterly: "Where can we distinguish one by one, we can only detect some hormones with long-lasting effects." During the flowering season of some trees, the aroma can attract bees more than 100 kilometers away. We can detect this. The data we obtained were analyzed by the Institute of Botany in the laboratory for sampling and detection methods in some plant and microbial environments. However, most of the reagents developed in the laboratory are not effective in our actual air sampling. Because they change in the air. ”

In the original seed farm, they selected several varieties of sweet potato, one is a high-yield processed type, which can produce starch, and the taste is very poor when eaten raw. This sweet potato needs to be saccharified at a later stage, and the food made is very popular. There is also a raw type, which has a slightly lower yield, sufficient moisture, can be eaten raw, and is roasted to be sweet and delicious.

A species with fine hairs on the leaves, resistant to pests and diseases, and drought tolerant, but needs to be grown in a sunny place, is known as the northern variety. The yield is not high, the growth period is short, but the processability is very good.

One is shade-tolerant, it only grows leaves and can be used as a vegetable, the rhizome is small, and the yield is very low. It is called a vegetable type.

Each type of sweet potato has different growth preferences, habits, harvest season, etc.

The northern varieties are the focus of Zhang Chun's visit, because they were sent by Gansu and Qinghai, bred here, and then returned. Very important for the grain production of the North. They are planted on the barren slopes of Mt. Shinu, where the soil is shallow and most of them are grassy.

However, Zhang Chun and Lizhi were attracted by the thick moss and ferns that covered the rocks.

It is important to know that bryophytes need more demanding water. It was noon, and the fog had not yet cleared from Mt. Shinu, which was probably the reason why these mosses and ferns grew so well. A few children came down from the hill giggling, each with a small basket filled with young fern leaves, which was a very good vegetable.

These children are supposed to be children from Shazhou Primary School, preparing ingredients for the school cafeteria.

Gently uncovering the mosses, these bryophytes not only absorb dust and moisture from the air, the moisture it retains actually promotes the weathering of the stones, and the growth of false roots accelerates the process. So there are already a few centimeters after the soil layer.

In some low-lying places, the soil is large enough for ferns to survive.

"I remember that Shinu Mountain used to be very dry." Zhang Chun asked.

"Originally, it was very dry, but the previous dryness was not normal, you must know that this is at the angle between the South River and the Yingling River, the forest on the mountainside and the grassland on the top of the mountain are restored, especially after the vegetation in the valley area is restored, the water vapor here often forms a fog to cover the top of the mountain in the morning and evening. Later we introduced mosses and ferns, which used to be only in the valley and now spread to the whole mountain. The fog is even heavier. There are very few dust particles in the air here, but there is more of this natural fragrance. ”

Cai Wuji took a deep breath and said, "In addition, this is also the source of many medicines. There are also a lot of vegetables harvested every year, and the quality is good. There are also a lot of animals on the mountain. Now it is no longer called Shinu Mountain, some people call it Shennu Mountain. ”

Zhang Chun laughed: "Although not every place can be like this, but this is still a happy thing." Let all the mountains give us their treasures, haha. (To be continued......)