In terms of current technology, there are two main ways to prepare the nutrient solution, one is the most traditional method, which is to use water as a solvent to soak the nutrient-rich material in it, add an appropriate catalyst, and make the nutrients dissolved in it, and then make a preliminary nutrient solution.

Another more professional approach is to extract pure individual nutrients from different materials through guò chemical means, and then mix these individual nutrients into a solution according to the needs of planting, and then make a finished nutrient solution. This is also the most common practice in the current hydroponic field, the cost is not low, but the deployment speed is fast, and the effect is stable.

Experienced people will mix these two methods to find their own unique blending methods and formulas, and the effect will naturally be more obvious, but this is not something that can be studied casually.

Yunli also uses this mixed blending method, the ore and wood in the wooden barrel are the raw materials that provide nutrients, and the surrounding cloth bags are filled with powders of various nutrient elements, which are all bought by Yunli at the agricultural station in the town. Feng Yisong said that Yunli was not a good student, because he saw the nutrient solution prepared by Yunli, and made a lot of common sense mistakes, the most obvious point is that there are more precipitated substances in the solution.

A good nutrient solution should be dark in color, thick but not thick in solution, and clear and translucent as a whole. The presence of precipitated substances indicates that the elements in the solution have undergone a chemical reaction, and the nutrient elements form a binding and precipitate, and the plant is unable to absorb the solid nutrients, so when preparing the nutrient solution, it is necessary to make a blend according to the chemical characteristics of various elements.

This is a common mistake for novices, and Yunli naturally knows it very well, but he is still very willful to do it in his own way, because he is like the Living Buddha Jigong, he has his own unique ability, and he can go beyond these rules and regulations and achieve things according to his own thinking.

Among the methods of preparing nutrient solution, there is another method that is extremely costly, cumbersome, and has a low success rate, but the effect is the best way, which is the electrolysis method. Through a high-voltage electric current, the matter is electrolytically separated in the electrolytic cell and the substance is reduced to an elemental state. The advantage of the nutrient solution made in this way is that all kinds of elements are stimulated into activity, which is easier to be absorbed by plants, and the solution has fewer impurities, the solution environment is pure, and there is no need to be equipped with disinfectant.

Although Yunli's electromagnetic force is far from reaching the strength of high-voltage current, it can complete the instructions in its own way according to Yunli's will. It's like if you want to break a brick wall, it can be done with tools or brute force, and Yunli only needs to convey instructions to the electromagnetic force, and it can dismantle the brick wall in its own unique way.

The precipitated substances in the nutrient solution, Yunli can use electromagnetic force to electrolyze and separate them again, which is not difficult, and he can also use electromagnetic force to electrolyze the nutrients in ore, soil and other materials. When Feng Yisong checked the nutrient solution before, Yunli said with certainty that the trace elements in it must be enough, and the reason is that those trace elements were electrolyzed from the ore by Yunli with electromagnetic force, and he was still very confident in this.

After getting Feng Yisong's guidance, he has more expectations for the next batch of plants to be hydroponics.

After commenting, Feng Yisong was also interested, fiddling with the raw materials around him, and showing Yunli how to prepare the nutrient solution for cultivating strawberries. Yes, there is an opportunity that money can't buy, Yunli watched while silently writing down the main points, and when he encountered something he couldn't figure out, he humbly asked for advice. And Feng Yisong also has to answer questions, and the answers must be exhausted, sometimes when the two have differences of opinion, he cites the classics, spreads out the corresponding knowledge points, and analyzes Yunli one by one, not arrogant or impatient, and has the bearing of a professional professor.

Later, Yunli took them to the field to watch, the twenty acres of potatoes and eight acres of cherry tomatoes were still seedlings, the ground was thin green, and the weather was cold, so it didn't look very angry. However, in the eyes of professionals, there are many places worth viewing, for Yunli dares to plant cherry tomato seedlings in this season, Feng Yisong is still very impressed, if this batch of seedlings can survive this cold winter, and wait for the next year's spring, the growth is bound to be very rapid.

In the experimental field, there are many mature crops, such as tomatoes, which can be eaten directly after picking, which is delicious and juicy, and makes people want to stop. Feng Yisong knew that Yunli's farms were all planted with green and organic plants, and he used local materials to prepare fertilizers, when he first heard this, he also felt that this young man was too idealistic, and he had no years of planting experience, and the initial results were definitely not good.

As a result, after seeing the crops in the field, the thought disappeared without a trace, and was replaced by waves of surprises. I have to admit that there are several crops in the Yunli experimental field, which are not inferior to those they grow in the greenhouse, or even surpass, and this is achieved in the open air, without using any chemical fertilizers and pesticides. If he hadn't seen it with his own eyes, he wouldn't have believed that it was the young man in front of him who didn't have much planting experience but had a new idea.

Even Feng Jiaqi, who had been playing with his mobile phone, couldn't help but look around, and took some photos at random to compare with the crops in his company. Although he doesn't have much planting experience, after all, he is a forestry professional and has a certain ability to judge, and he has to admire the results in front of him.

When they visited the test field, Lu Ci happened to come, and Yun Li realized that time passed so fast, it was already more than four o'clock in the afternoon, and Lu Ci would come to Xiaolu Mountain at this point in time recently.

In winter, the days are shorter than usual, and they are even more noticeable here in the southwest, when the sky is almost completely dark before six o'clock. It was not easy for them to come once, so Yun Li invited them to stay and finish dinner before leaving, Feng Yisong was of course very happy, he also wanted to sit down with Yun Li and have a good chat, and then listen to his novel views.

But what is surprising is that Feng Jiaqi, who has always been cold, immediately agreed after Yun Li made an invitation, faster than his uncle Feng Yisong, with a smile on his face, and the whole person became enthusiastic.

After this period of training, Yunli's cooking skills have improved greatly, and there is no problem when he usually brings a few dishes up. However, this time he wanted to entertain the guests, so he was still safe, and asked Lu Ci to help cook two dishes, and then cooked two more specialties by himself, and a table of pastoral specialties was made.

Compared with Qi Yunli, Lu Ci's cooking skills are much better, although she didn't use the kitchen much before, but after the Lu family incident, she began to be self-reliant, and it was natural to cook a few home-cooked dishes.

Lu Ci made stuffed meat and eggplant, consuming oil to fry seasonal vegetables, while Yun Li made the specialty dishes of steamed chicken with potatoes and scrambled eggs with green onions, Yun Li also specially invited Xu Lin over and entertained two guests with Lu Ci.

Xu Lin has been in good shape recently, he has drunk less alcohol, and his daily work can be completed step by step, and now in his spare time, in addition to sleeping, he takes out the two boxes that were broken by Brother Chen, and tries to find materials to repair. Yunli invited him to come to the bamboo building for dinner, and he didn't refuse, but he was still silent and ate by himself.

During the banquet, Yun Li originally wanted to ask Feng Yisong for some things, but Feng Jiaqi took over. He asked about the development prospects of greenhouses, and Feng Jiaqi talked about how professional their Feng's greenhouse planting company is and how it is well-known in the industry. Yunli wanted to ask about the price of hydroponic facilities, and Feng Jiaqi told them how to deal with material suppliers before, negotiated with them, and finally took how much money was taken.

Even if you are blind, you can feel that Feng Jiaqi's changes are all because of Lu Ci's appearance. In fact, when he first saw Lu Ci, Yun Li noticed the change in Feng Jiaqi, and Lu Ci himself also noticed this burning gaze and wanted to avoid it, but because they were Yun Li's guests, he didn't say anything.

Feng Yisong knows his nephew's character very well, he is usually quite stable, life is too smooth, it is inevitable that he will have some ego and arrogance, and he will work hard to fight for what he believes, which he still appreciates.

Feng Jiaqi is almost twenty-eight this year, he has talked to several girlfriends before, but there is no result, and the family is also anxious about this, it is rare to meet him this time, Feng Yisong will follow him, if it can really be negotiated, it will be better. So he, like Xu Lin, ate by himself, didn't intervene much, and occasionally echoed it to help Feng Jiaqi as a foil.

Lu Ci is not the kind of cheerful and talkative person, let alone take the initiative to talk to Feng Jiaqi, Feng Jiaqi will knock on the side from time to time to get close to Lu Ci, but what responded to him was the three random words "um", "oh", and "ah". But he didn't seem to care about Lu Ci's cold attitude, or he didn't notice it at all, he was still talking, and even the down coat was taken aside.

Yun Li knew that at this meal, he couldn't ask anything more from Feng Yisong's mouth, Lu Ci and Xu Lin were silent again, in order for the atmosphere of the scene to not be as cold as outside, he had to deal with Feng Jiaqi hard, saying some rambling words.

Seeing Yun Li's embarrassed appearance, but he couldn't help, or Lu Ci didn't want to help at all, so he had to give him a look, to the effect that he said: "Revolutionary comrades, you must keep the fruits of victory, the dawn of victory is just around the corner, hold on, it's up to you." ”

Yun Li squeezed his eyebrows and responded: "The enemy army is besieged by thousands of people, and I am immovable, comrades rest assured, the fruits of victory belong only to our great proletariat." ”

In the strange atmosphere, the meal was over, and after helping to clean up the things, Lu Ci made an excuse and left, and Xu Lin also returned to the small building on his own. And Yunli took Feng Yisong to Jifang Garden again to help him dig neon jade dew.