Dr. Li Weixin took a short rest, and the next day he vigorously led the researchers out to study the geological conditions of the saline-alkali land.

Qi Zheng advised him to rest more, and he retorted: "We are here to solve problems, not to sit and be masters." The sooner you figure out the situation, the sooner you can carry out governance and development. When can't you rest when you rest? After death, there is time to rest. ”

Qi Zheng was impressed, so he could only ask Xie Kaiji to arrange personnel to be responsible for the logistics of Li Weixin's team to ensure that they had no worries.

Chen Jianzhang also took laboratory researchers to assist in the research, and investigated the geological data such as salt content, PH value, organic matter content, and buried depth of groundwater level in saline-alkali land.

After grasping the first-hand geological data, Dr. Li Weixin and Chen Jianzhang jointly visited.

"Our decades of governance research have shown that there is no such thing as the most advanced technology, only the most appropriate technology. The causes of the formation of different saline-alkali lands are often different, and even if they are the same cause, the treatment measures often take different. Dr. Li Weixin said first.

Qi Zheng nodded in understanding.

It's like a doctor, the same symptoms may have different causes, for example, a man sweats too much, it may be kidney deficiency, but it may also be that he is wearing too many clothes......

The key is to get the right medicine. In the same case of tracheitis, some people need to stay away from the haze, and some people may just need to open more windows for ventilation in exchange for some fresh haze......

"For a long time, saline-alkali land improvement related projects are mainly to take physical measures such as digging alkali ditches, irrigation and salt washing, mechanical deep ploughing, and soil replacement, although the results are fast, but due to the large investment, labor-intensive and laborious, and will cause serious waste of water resources, it is also easy to cause secondary salinization in downstream areas. ”

It's also easy to understand that, in the final analysis, these physical measures are only used to transfer the salinity in the soil by washing with water, but the matter will not disappear in vain. If the saline-alkali land in the upstream is well controlled, it may be that another good cultivated land in the downstream will be saline-alkali, which will treat the symptoms but not the root cause, and cannot completely cure the saline-alkali land.

"Therefore, in the process of treating saline-alkali land around the Bohai Sea, we have explored a set of comprehensive measures such as physical, chemical, biological and farming improvement to treat both the symptoms and the root causes, and the results have been remarkable. ”

Dr. Li Weixin elaborated, for example, in physics, mechanical deep ploughing, saltwater freezing irrigation to improve soil structure and mature soil, plastic film covering hole seeding technology to inhibit salt and salt inhibition, chemical application of soil conditioner to neutralize salinity, biological improvement to plant cotton, corn, forage and other saline-alkali tolerant crops, etc., tillage improvement to apply sheep manure, cow dung and other organic fertilizers to improve fertility......

"This is the same coastal area as the Bohai Rim region, and the situation is generally similar, but it is better than the severe salinization in the Huang-Huai-Hai region, and it is only moderately salinized. According to our experience, we should make overall arrangements and manage the ...... in phases."

Qi Zheng listened carefully to Dr. Li Weixin's plan and thought thoughtfully.

It should be said that his plan is very reasonable, and the comprehensive management measures adopted are relatively mature, but there is a problem......

"Dr. Li, according to your plan, how long will it take for these 200,000 acres of saline-alkali land to be improved to the level of fertile land?"

Dr. Li Weixin gave an estimated time, "If you guarantee sufficient investment, it will take at least three years." ”

Qi Zheng immediately shook his head when he heard this, "This is too slow!"

You must know that the construction of a milk source ranch will take at least three years, but the ups and downs of the dairy industry cannot tolerate Jiagu waiting for such a long time. Qi Zheng also planned to rely on the Spirit Array to speed up the construction of the pasture, how could it be possible to spend three years slowly and leisurely to simply improve the soil?

Li Weixin's face did not change, but he sighed secretly in his heart. Chen Jianzhang has discussed this with him a long time ago, and the idea of doing business is different from theirs, and they always hope to invest and output as soon as possible.

"Then the most direct and fastest way is to pour water and wash salt. There is an abundance of groundwater here, and this most common method can be taken. But to be honest, this is a big project and high cost, and secondly, as the saline components are washed, the organic matter is also washed away, which not only wastes water, but also brings serious degradation of the soil. I don't recommend pursuing speed like this. ”

To put it simply, when the salt content of the soil surface layer is high, the salt is flooded with fresh water to infiltrate the salt into the deep layer of the soil with the water.

But just like putting too much salt in the dish, you rinse the dish with water again, and in the end it is indeed not salty, but the quality of the dish after soaking can be imagined......

Qi Zheng set his sights on Chen Jianzhang.

Chen Jianzhang synthesized the needs of enterprises and the actual situation, and finally said: "Simple irrigation and salt washing is definitely not advisable, due to the shallow groundwater level and seawater irrigation, etc., only using this method, the saline-alkali land is just treated for a while, just desalination will soon return to salt, the effect can not last." ”

"But can it be combined with other improvement measures? I think it can be like this, first test it from a small area, combine deep ploughing and deep ploughing and apply irrigation and salt to see the actual effect, and then improve the deficiencies. If there is value in promotion, adopt it; ”

Qi Zheng and Li Weixin glanced at each other and nodded. It is also the principle that it is necessary to look at the actual effect before it is meaningful to discuss.

What's more, Qi Zheng wanted to combine the spirit array to see how effective the two-pronged approach could be.

......

1,000 acres of saline-alkali land near Luokou Village were set aside as a test site.

Several large cultivators plough the ground back and forth, the rumbling of the motor rattles the eardrums, and the salt in the topsoil is turned up to the bottom of the tillage layer, while the less salty subsoil is ploughed to the surface.

On the other hand, by digging dialysis wells, erecting transformers and wires, electrifying and pumping groundwater, and repeatedly using fresh water to circulate and permeate the topsoil, the saline-alkali layer is degraded and infiltrated.

In places where everyone can't see, the "Blue Waves and Qinghua Array" operate silently, slowly filtering the groundwater infiltrated by salt and reducing the salinity of the groundwater.

Li Weixin and Chen Jianzhang led the research team to test the salinity of the soil after irrigation and salt washing, and at the same time added calcium amendments such as phosphogypsum and fly ash to the experimental field for reference.

The lively scene attracted many onlookers from the villagers, who were discussing something with great interest, and from time to time there was hearty laughter.

Without exception, they all hope that Jiagu will succeed and turn the barren land into a green and fertile land, which will also lead them to make a fortune.

The data obtained after the test was concentrated in the hands of Dr. Li Weixin, who looked at the data with a strange expression.

"What's wrong?" Qi Zheng asked curiously.

Li Weixin checked it from the beginning again, and raised his head with complicated eyes.

"Effect...... Too good to be true......" he paused and continued: "It's kind of unbelievable that the salinity of the soil has plummeted by more than 60 percent, and the point is that the salinity of the shallow groundwater has barely changed. ”

He couldn't take care of Qi Zheng for a while, fell into thought, and muttered to himself: "The porosity of the soil is ideal...... In the case of groundwater, it is probably related to the deposition of salt......"

Qi Zhengyi raised his eyebrows, so he sometimes likes these scientists very much, because even if they encounter something unreasonable, they tend to consider it from a scientific point of view, although it may not be in line with the truth, but there is always a plausible explanation.

Practice has proved that the spirit array combined with irrigation and salt washing does have miraculous effects, and this is enough. As for Li Weixin's explanation, Qi Zheng didn't care.

"So, this method works?" Qi Zheng asked tentatively.

Li Weixin reacted, but he was a little entangled, "At present, it seems that ...... Yes, but I calculated that in this way, the average treatment fund per mu of saline-alkali land needs about 1,000 yuan, and it is really too manpower and material resources. 200,000 acres of saline-alkali land, if all such methods are adopted, it will be fast, but the investment is too large......"

Qi Zheng smiled silently.

Li Weixin couldn't figure out Qi Zheng's thoughts for a while.

Until the next day, when he went out, he saw a lot of camps outside the village, a convoy roared into the camp, excavators, tractors one after another, the drivers greeted each other with a smile, waiting for the staff of Jiagu to allocate the site, a hot scene.

Li Weixin looked at this large-scale team and was stunned for a moment.

Qi Zheng also walked over, looked at the team happily, and felt the enthusiasm of the team drivers, and was very satisfied.

Li Weixin glared at Qi Zheng, "No kidding, you really plan to do this and get ...... quickly"

The big team in front of him seemed to fully demonstrate Qi Zheng's determination, and he couldn't believe it for a while.

Qi Zheng smiled, pretending to be mysterious and said to Li Weixin: "Dr. Li, there is one thing you probably don't know, what is our greatest advantage?"

"Huh?" Li Weixin was piqued with curiosity.

"The biggest advantage is that we Jiagu are very rich!"

Li Weixin's eyes widened.

......