In the next three days, Tianminglin went to the small space every night to renovate the 10,000-square-meter greenhouse space.

10,000 square meters is equal to 15 acres of land area.

Tianming originally planned to plant all the six-leaf clovers and yellow dates, but Tianlin Jian said: "Brother, if people want to live in a small space in the future, it is not easy to bring food, vegetables and fruits from the outside, it is better to plant some vegetables in the greenhouse space and be self-sufficient, which also saves the need to bring them from the outside." ”

Tianming accepted this construction, and when he planned it, he thought that the earthlings on the side of Blue Mercury also need fresh ingredients such as vegetables and fruits, and it is not convenient to bring them from the earth, so it is better to open up a few more greenhouse spaces in a small space to meet the needs of the earthlings on the side of Blue Mercury, so that the dishes are fresh, and it saves a lot of trouble.

The small space is located under a crack canyon in the Barren Star, and it is not easy to expand in the direction of the cliff face, but there is still room to expand outside.

Tianming went to look outside, to the east of the small space, there is an endless barren mountain, stretching for thousands of kilometers, the terrain is rugged, the ravines are vertical and horizontal, and the surface is mostly rocky...... If the small space is extended to the east, it will be necessary to do some land leveling work.

Put these problems aside for now, or just transform the greenhouse space first.

There are three elements to plant growth: soil, water, and light.

The soil must be loose and contain inorganic salts, preferably sandy soil with good air permeability, the higher the sand content, the more suitable for plant growth.

No plants can grow on the rocks, so Tianming used the ability space to "smash" the ground made of hard rock in the greenhouse space.

Of course, it was not the whole piece of land, but according to the lime line drawn by Tianlin, the land in the fifteen grids was crushed one by one, and one grid was close to one acre. Leaving some hard rock to separate each plot of land ensures that each plot is independent and will not affect the other plots in the event of pests or diseases or soil deterioration in the future.

After the work of leveling the land and crushing the rocks is completed, the greenhouse space looks very standardized, and the red rock paths really have a kind of "field" meaning in it.

It is not enough to crush the rocky ground in the greenhouse space, but also to see if the crushed red soil is suitable for plant growth.

Tianlin puts the red soil into a cup and fills the cup with water. After filtration, a soil solution is prepared, and the composition of each nutrient element in the solution is measured.

"The levels of nitrogen, phosphorus, potassium and magnesium are not up to standard, and the iron and salt content is particularly high, and this kind of soil is not suitable for plant growth." After measuring the fertility of the soil, Tianlin Road.

"Oh, then it's time to fertilize the ground."

Tianming had expected this, and it would be strange if this kind of soil could grow plants directly.

"Let's solve the water problem first."

When the field was first opened. Tianming asked Tianlin if he wanted to build a pool in the center of the greenhouse, and then dig a canal inside the ridge to lead to the guò pool and the canal. It is very good to water fifteen plots of land, not to mention the convenience, and you can also raise fish or something in the pond.

But. Tianming thought about it again, there were already a lot of fish in the strange fish lake, and there were too many fish on Blue Mercury to eat. Raising fish in a pond is purely for fun and waste, and there is no need.

Tianlin said: "Brother, it's better to get a sealed water tower, if you open up a pool, the water consumption will be large, and the evaporation will be large, so it will be more troublesome to replenish it when the time comes, so it is better to get a large water tower and replenish the water once every six months." ”

"Okay, then build a water tower."

The water tower is made of silver and steel, ten meters high (already close to the top of the greenhouse space), with a bottom area of about 80 square meters, and can hold up to 8,000 tons of water.

The water tower extends to the surrounding area of water pipes, leading to fifteen plots of land, through guò valves to control the device, in the event of a drought, turn on the faucet, any piece of land can be replenished with water.

Finally, there is the problem of light, under the barrier of space, the light intensity of the outside into the greenhouse space is 4500lx, which is half of the earth, but the light time is long, 32 hours, 28 hours, under direct sunlight.

The atmosphere of the greenhouse space is only ten meters high, and it is impossible to store cloudy and rainy weather, which is basically a brilliant and sunny day.

There is certainly no shortage of light.

Then the only thing to be solved is the problem of soil fertility.

Tianlin proposed three solutions: transplanting soil, releasing solid fertilizer, and configuring nutrient solution.

If you transplant soil, you can only transplant the soil in the small space into the greenhouse space.

The soil on the earth contains a variety of microorganisms, mites, insect eggs, carrying biological pollution, some microorganisms and pathogens, the danger to crops is very great, take the greenhouse vegetables planted in Tianlin as an example, every three years, he will pull out all the vegetables in the greenhouse, disinfect the soil...... Failure to do so can lead to large-scale insect infestations and reduced yields.

And Tianming doesn't want to transplant the soil of the small space to the greenhouse space, the damage is too great, and the small space will be dug up in the east and the west, how ugly is it?

Then you might as well transform the soil yourself.

The first method excludes.

There are two types of solid fertilizers: chemical fertilizers and organic fertilizers.

Chemical fertilizers are fertile and effective, but they are easy to lead to soil compaction, and the effect is quick in the short term, but the long-term use of chemical fertilizers will overdraw the potential of the land.

Organic fertilizer is to collect animal manure and let microorganisms or earthworms decompose, leaving a large amount of inorganic salts. In organic fertilizer, the nutrients required by plants are abundant, and the effect on promoting plant growth is very good, and the action time is long, the fertility accumulation effect is good, the organic fertilizer is used more, the land will be more and more fertile, basically every year can ensure stable and high yield.

However, in organic fertilizer, there are still microorganisms, which are beneficial to crops on the earth, but bringing such microorganisms into a small space still cannot guarantee that there will be no biological contamination, so for the sake of safety, Tianming has given up solid fertilizer.

This leaves one last option: the nutrient solution.

"Brother, if you want a nutrient solution, you may need a professional to prepare it. Of course, I can match it myself, but I can only match some nutrient solutions with fewer types of elements, and if there are more than five types of elements, it is difficult for me not to match them. My father-in-law is an expert in this area, and we can bring him over to help. ”

Cheng Fangwen has been working in the field of soilless cultivation for more than 30 years. Those who have prepared the nutrient solution can grow vegetables directly. In this regard, he is naturally more than a little stronger than Tianlin, and if he is brought in, this problem can be completely solved.

Tianming nodded: "This is a good solution, but your father-in-law is still in the city, so he can't catch up for the time being." Let's start by finding a way to plant these lands. ”

In the end, Tianming came up with an ingenious solution to temporarily solve the problem of nutrient solution.

The method is very simple: seawater salt extraction.

The sea water here refers to the sea water of Blue Mercury.

On the surface of the blue mercury sea, hemp trees can grow directly. This shows that the seawater of Blue Mercury is a nutrient solution that is very suitable for plant growth, and it must contain all the elements needed by plants.

Tianming immediately went to Blue Mercury and pumped 10 million tons of seawater from the sea into the ability space.

Tianlin said: "The elements that plants need. In addition to carbon, there are also hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and other macroelements, and iron, copper, zinc, manganese, molybdenum, chlorine and other trace elements are also essential, of course. These elements are suitable for the growth of plants on the earth. Plants in a small space should also need several special elements to grow, which are not found on the earth, but are indispensable. I don't know what the characteristics of these special elements are, but they certainly exist. ”

Tianlin failed to plant red fruits last time, and used a small space after the soil. The reason he could think of for the immediate success of planting could only be that the soil in the small space had some special elements that the earth did not have.

"You guessed right, there are more than ten kinds of elements in the soil of the small space that are not available on the earth, and three of them are still necessary elements for jujube and six-leaf clover, and it is not possible to do it at all." Tianming explained after comparing the types of two soil liquid elements extracted from the earth and small space.

The types of elements contained in the sea water of Blue Mercury are basically the same as those in the small space, and the elements that are in the small space are almost all found in the sea water of Blue Mercury.

According to the content of various elements in the soil sap of the small space, it didn't take a few minutes for Tianming to use the seawater of Blue Mercury to prepare the nutrient solution suitable for the growth of plants in the small space.

Then there is the nutrient solution suitable for the growth of the earth's plants, and Tianming quickly prepared it.

In the process of configuration, if the content of some essential elements is too small, Tianming will also use the static field space to synthesize some, such as rare elements molybdenum, manganese, zinc, etc., and it is no problem to synthesize hundreds or thousands of tons at a time, and then add them to the nutrient solution, so that all the necessary elements are complete and sufficient.

The nutrient solution suitable for the growth of plants in a small space is called "Nutrition No. 1" by Tianming

The nutrient solution suitable for the growth of plants on the earth is called "Nutrition No. 2" by Tianming

Generally, the salt concentration of the nutrient solution is about 0.3%, that is, 100g of nutrient solution, only 0.3g of nutrients, for the sake of the figure, Tianming will pump out all the water, and the 6 million tons of nutrient No. 1 will be distilled into 18,000 tons of powdered salt. 4 million tons of Nutrient No. 2 was re-distilled into 12,000 tons of Nutrient No. 2 salt.

In this way, when the nutrient solution is to be used, the nutrient salt is directly put into fresh water to dissolve the configuration.

As for the remaining sea salt, which has no use value, it was all dismantled by Tianming and stored in the static field space to be used as the basic raw material for the synthesis of new substances.

There are also more than 9.8 million tons of fresh water from dry distillation, except for a part of the water tower that is filled with the greenhouse space, most of the fresh water is poured into the strange fish lake in the small space by Tianming, and the water level on the lake immediately rises by more than 1 meter.

In order to store the two kinds of nutrients that add up to 30,000 tons, Tianming has opened up two salt storage warehouses next to the greenhouse space - both with a volume of about 5,000 cubic meters.

"Tianlin, these nutrients should be enough for this greenhouse space for a while, right?" Tianming pointed to the slightly yellow white nutrients in the warehouse space and said to Tianlin.

"Enough, enough!" Tianlin said excitedly.

…… (To be continued......)