Farming is to ask for seeds, but these seeds are not good to go directly to the outside to get in, so these days, in addition to the vegetable seeds Tianlin himself has, other seeds are bought by Tianming himself at the outside seed station, such as rice, wheat, corn, peanuts, soybeans, rape, cotton, peaches, pears, apples, oranges, etc., all bought at the seed station, a total of twenty or thirty kinds.

The amount of seeds adds up to more than 300 catties, which is basically enough, after all, ten greenhouse spaces, except for two that have been utilized, the remaining eight greenhouses, adding up to 120 acres, with the help of Tianming's ability, it will not take a few days to complete the planting work.

But there are still two problems that need to be solved by Tianming.

One problem is the temperature of the greenhouse space, under the long-term exposure of sunlight, the temperature of the red rock ground continues to rise, even if the light intensity is less than one percent of the outside of the small space, but the surface temperature is easy to reach more than 60 degrees. And because the greenhouse space is closed, after a long time, it is like a steamer, and people dare not stay longer.

As a last resort, Tianming had to run outside the greenhouse space, covered the eight greenhouses with black light-blocking glass, and only left a 100-square-meter "skylight" in the center of each greenhouse, so that the temperature in the greenhouse could be maintained at a normal level without being too dark.

Of course, this practice is only a temporary measure, the plants in the greenhouse want to grow, it needs daylight, the outside of the light shield glass is to be removed sooner or later, Tianming must come up with a new way, before the plant grows, the temperature in the greenhouse space is lowered.

"Water is the substance that cools down the most. If you open a pond with an area of more than 3 acres in each greenhouse space, the temperature will naturally drop. Cheng Fangwen said.

"Dad, I don't think this is necessarily, if you can't form a convective environment, even if the greenhouse space is full of water, it may be heated to a high temperature state, and it will not achieve the effect of long-term cooling." Tianlin Road.

Tianming is also aware of this problem, the space barrier is a good "insulation material", and it is difficult to emit the light from the outside world. Or that the speed of heat dissipation is far from keeping up with the speed of heat absorption.

And the barren star outside the greenhouse space. The surface temperature is more than 200 degrees, and it is good that the heat from the outside does not penetrate in, but how can the heat from the inside be dissipated to the outside?

According to the law of conservation of energy, a low-temperature environment cannot transfer energy to a high-temperature environment.

Convection. is the key to solving the problem.

At last. After some discussion. Came up with a great solution: convection blowing.

The implementation step is that Tianming opened up another greenhouse space behind the No. 10 greenhouse space. Fill the greenhouse space with fresh water, put a large water sprinkler, the water sprayer can spray a large amount of water mist, and then behind the water mist, place a high-power fan, let the fan blow out a high water content of the air flow, high humidity air flow all the way through the ten greenhouse space, take away a lot of heat, so as to have a good cooling effect.

It took a lot of effort, Tianming quickly made the water sprinkler and high-power fan, but the power system is a little difficult to do, if you use a supercapacitor battery pack, it will probably be charged once a month, troublesome, Tianming built a generator out, the power is 10KW, burning hydrogen to generate electricity, supplementing a tank of hydrogen, about a month of continuous power generation.

Although it is troublesome, Tianming does not dare to use nuclear energy in a small space, it is too dangerous, because this thing is not something that one or two people can control, and he doesn't want to put a time bomb next to his family.

Another problem is the concentration control of carbon dioxide in small spaces.

After more than ten days, the carbon dioxide concentration in the small space has dropped from 0.032% to 0.031%, a decrease of 0.001 percentage points, and the result is that the plants in the small space have grown crazy, desperately rubbing up, and the yellow jujube trees have produced a large number of small yellow jujubes, and the yield of red fruits in the six-leaf plain has soared from 40 catties per mu to 100 catties, and the yield is bursting.

Tianming specially went to the Liuye Plain to pick 500 acres of red fruits with his ability, and got 50,000 catties of red fruits, these 50,000 catties of red fruits, 10,000 catties of dried red fruits, 10,000 catties of red juice, and the remaining 30,000 catties of red fruits were stuffed into 200 barrels by Tianming, ready to be made into red fruit wine.

Moreover, Tianming clearly saw that even the giant sequoia trees in the giant red fir forest had grown two meters taller on average, and the change was obvious, because the light green branches and leaves at the top of the canopy were like camphor leaves in spring.

But to Tianming's surprise, the carbon dioxide concentration went down, but the average temperature of the small space went up, from 27.2 degrees to 28.4 degrees, increasing evenly every day, and it may break through 28.5 in two days.

"Brother, I think this should be the result of the greenhouse effect, because after a period of rapid growth, the growth rate of plants in small spaces has slowed down, and the light energy absorbed by photosynthesis is less, and the excess energy naturally accumulates into the atmosphere, and the air accumulates a little bit of residual energy every day, and the temperature naturally rises." Tianlin Road,

"How to solve this problem?"

"It's very simple, let the plant continue to grow, grow to the point where it needs to absorb a lot of light energy to sustain basic life needs, let the energy returned to the atmosphere be so small that it won't cause the temperature to rise, and finally reach a new equilibrium, an equilibrium where the plant no longer grows and the temperature no longer rises."

How to keep plants growing, a simple way: fertilization.

Tianlin has previously measured that the soil in the small space is severely deficient in potassium, mild in phosphorus, and may also lack other trace elements, but as long as potassium fertilizer and phosphate fertilizer are applied to the plants in the small space, these two fertilizers can accelerate the growth rate of plants in the small space by at least 20%.

In the static field space, Tianming used the remaining sea salt last time to synthesize 8,000 tons of potash fertilizer and 3,000 tons of phosphate fertilizer, and then dissolved the two fertilizers in water, prepared into a solution, flew into the air, and spread them evenly in a small space.

The effect is very good, the next day, the temperature of the small space stabilized, and even dropped slightly, which made Tianming breathe a sigh of relief at the same time, looking at the dense vegetation in the small space and shaking his head and smiling bitterly, the current small space is unrecognizable compared to the original, how could there be a two-meter-high star grass before? People went in and searched for it, but they couldn't find it. The thickness of the sleeping grass is more than 20 centimeters, which is comparable to the spring bed at home.

……

Twenty-one days have passed, and it is time to go out.

"Time flies so fast, how nice it would be if we could spend the New Year in a small space?" Cheng Dong complained.

"yes, but I haven't watched TV for a long time, I don't know if those TV series have been updated?" Song Xueyao said with Xiao Xue'er in her hand.

Xiaojuan hugged Chong Chong off the back of Little Gray Ash, and Little Gray Gray was relieved and ran into the distance. "Ahhhh No matter what Chong Chong called, Little Gray Ash just didn't look back.

Tianming took his grandparents to the strange fish lake, set up a parasol on the beach, put a rocking chair as a background, and then let his grandfather wear a checkered shirt and white shorts, and his grandmother wore a straw hat on her head and also wore a single dress, let the two snuggle together, picked up the camera, and Tianming took a few intimate photos for them.

My grandfather didn't want to leave the small space, so my grandmother naturally stayed in the small space.

In order to reassure the aunt and several uncles, Tianming took a few photos of his grandparents and gave them an errand.

In addition to his grandparents, Xue Hong and Cheng Fangwen and his wife also temporarily stayed in the small space, Cheng Fangwen was responsible for taking care of the ten greenhouse spaces, and Xue Hong helped take care of the two elderly people and was responsible for cooking. Later, if they get tired of it, Tianming will find a way to replace them.

……

Earth, and the village.

It's February 1st, 9 a.m. outside.

"It's finally out, and the house is a little dirty."

Seven days after leaving home, a layer of dust fell on the table and cabinet at home, Liu Hongcai frowned, took a rag, and wiped it around.

My mother is a person who loves cleanliness, and she frowns when she sees things like dust and cobwebs, and she will never stop until she cleans them.

"Mom, there's too much dust, I'd better get it."

Tianming opened the ability space, and used the ability to "sweep" all the dust attached to the doors, windows, tables and chairs in the room, and compressed it into a fist-sized ball.

The earth's PM2.5 content is so high that if it were in a small space, it would not be so thick in a year. Tianming heart said.

Everyone went to the front hall and backyard, upstairs and downstairs to see again, the things were basically intact, and there were no traces of thieves in the house, so they went up to the second floor with confidence, turned on the air conditioner, and sat in the living room to rest.

"Cheng Dong, let's go, let's go to the scenic spot to have a look." After drinking a cup of hot tea to warm up, Tianlin pulled Cheng Dongdao.

"Brother-in-law, the scenic spot should be fine, Manager Shen and Da Mao are watching, you don't have to do everything, the weather is so cold, how good is it to rest at home?" Cheng Dong said reluctantly.

"Twenty days of rest in a small space is not enough? Hurry up, don't grind. Tianlin urged.

"Alas, I have to go to work as soon as I come out, and I am the boss, and I am more tired than the employees."

Cheng Dong reluctantly got up from his chair and draped his thick coat over himself.

As soon as the two of them walked to the back mountain, they suddenly saw that more than a dozen vans were parked at the gate of the scenic spot, where a large number of people gathered, some of them were still brandishing steel pipes and half-meter-long control knives, shouting constantly, and all kinds of foul words burst out of their mouths: "C fuck you!" "Get out of here!" "Grass, I'm impatient to live, I'll level this place today!"

Tianlin sighed in his heart: It's not good, something happened to the scenic spot!

Wang Jinshun, a villager who was hiding on the side, was overjoyed when he saw Tianlin, and immediately ran over and said anxiously: "Tianlin, it's not good, someone has come to the scenic spot to make trouble!" ”

…… (To be continued......)