The greenhouse has been completed and the spinach seedlings have been placed on the planting racks.
The greenhouse currently has only lighting but no heating. The engineering department built a simple water pipe to connect the growing racks and installed a water pump to ensure water circulation.
Next to her, Jin Yiyun was also holding an instrument in front of the hydroponic box on the planting rack. She looked at the data on the instrument and said, "Qiao Qiao, the pH value is only 5.1."
The measuring instruments were borrowed from the water supply room, which also needed to measure the various parameters of the purified water they produced every day to see if they met the standards.
Qiao Xuejun: "Add some potassium hydroxide, and keep it at 5.5-6."
Jin Yiyu also has experience in planting and knows how to operate it.
They are responsible for debugging the nutrient solution today.
Both pH and EC values need to be controlled.
The pH value is the acidity and alkalinity. Spinach is very sensitive to pH and should be controlled at around 6. If the pH value is too low, the roots will rot. If the pH value is too high, it will have difficulty absorbing some nutrients, resulting in stagnation and yellowing of leaves.
The EC value measures electrical conductivity and total ion content. In simple terms, it measures whether the nutrient solution has enough nutrients. Too much will burn the seedlings, and too little will prevent them from growing. Both must be controlled.
It needs to be monitored every day.
There are quite a few instruments, all of which were modified and processed by the engineering department themselves. They are relatively simple, but very useful.
Eight people work, with two people responsible for one greenhouse, including adjusting and correcting the concentration of the nutrient solution, which can be completed in 20 minutes.
The system excitedly appeared and announced: "Host, your primary greenhouse has been successfully built! Congratulations, you will be rewarded with a greenhouse primary building materials gift pack!"
Qiao Xuejun: "Reward?"
System: "Yes, there will be mission rewards at each stage of the farm."
Qiao Xuejun: "I want LED plant lights. Do you have any?"
Now it is the most common energy-saving, which is completely inferior to the LED plant lamp. With it, the 30-day growing period of spinach can be compressed to 25 days.
The system took a look and said, "The gift package only contains tarpaulins, steel racks, hydroponic racks, water pipes, water pumps, high-end energy-saving lamps... but no LED plant lights."
After hearing the reward, Qiao Xuejun understood a little: "So, the reward is an upgraded version of what I already have?"
So the upgraded version of the energy-saving lamp is the advanced energy-saving lamp. This makes sense.
In short, you can use the reward package given by the system to build a new primary greenhouse.
But don’t even think about advanced stuff.
Qiao Xuejun frowned and thought for a while: "If I make a low-end version of the LED plant light, can you reward me with a professional LED plant light?"
System: "Of course, host. Can you also make lamps?"
Qiao Xuejun raised her lips. She wasn't an engineer, so of course she couldn't do it. But there was a very simple thing, a low-profile version of a plant light.
Qiao Xuejun picked up the intercom and contacted Zhao Yun while walking out of the greenhouse.
"Engineering Department, calling Deputy Minister Zhao."
"Teacher Qiao?" Zhao Yun quickly picked up the intercom and replied, "What's wrong? Is the water pump working well?"
Qiao Xuejun: "It works well. But I want to ask you another question. Do you know about sun lamps?"
Solar lamps, the ghetto version of plant lamps.
Zhao Yun hesitated for a moment. "Solar lights? There's not much sunshine right now. Solar energy wouldn't be very useful, would it?"
Qiao Xuejun: "No. Or rather, the sun bottle? Do you know?"
The Andean sun bottle is a way to replace electric lighting.
In some countries with power shortages, it is commonly used in slums. Those slums are usually crowded, with dense iron shanties, and the houses are dark even during the day.
Even if a hole is made in the roof and sunlight shines in, it can only illuminate a point directly, and the illuminated area is very bright.
But someone came up with a solution. If a bottle filled with water was embedded in the hole in the roof, the sunlight would pass through the bottle and scatter the light evenly, illuminating the entire room.
No electricity is needed, just a bottle of water can provide light, saving resources.
This is the sun bottle.
Solar bottles are sunlight, which are much closer to LED plant lights than energy-saving lamps. Even if you don’t give plant lights, an enhanced solar bottle lamp is better than what you have now.
Zhao Yun suddenly realized: "Oh, you mean the pauper's lamp."
Qiao Xuejun was speechless. This place was actually called the Poor People's Lamp.
She said, "Yes, I plan to install a few more sets in the greenhouse to save resources."
Zhao Yun: "But the daylight hours are only three or four hours now, so there's not much time we can use."
Indeed, the sun bottle itself relies on sunlight. It stays lit as long as the sun is bright. The greenhouse itself has its own lighting supply, so that's not a big deal.
But Qiao Xuejun’s goal was the reward later.
Anyway, it doesn't cost anything and it's not troublesome.
She found a reason: "The spectrum of sunlight is more complete, and a few hours of sunlight every day has its benefits."
Zhao Yun: "Okay. That's easy. I'll have someone install it for you right now."
Soon, someone from the engineering department came over, carrying a stepladder and planks, and greeted us, "Teacher Qiao, we're here!"
Qiao Xuejun went over and looked at the bottles they brought: "That's quite a lot."
The person from the Engineering Department said, "Our deputy director has calculated that each greenhouse should be equipped with 8 lights."
Qiao Xuejun asked, "Is the water bottle protected against freezing?"
Water freezes at zero degrees. The lighting effect of a frozen bottle will not be as good and it will be easy to spoil.
The person from the engineering department said, "Don't worry, Mr. Qiao! We added salt, high salt! The freezing point must be low."
This thing is easy to install and there is no technical difficulty. They finished it in a short while, installed the sun bottle, and went in to see the effect.
Once you are sure there is no problem, seal the place where the sun lamp is embedded with glue to ensure it is secure.
At 13:00, the sun came out.
Qiao Xuejun walked into the greenhouse and Jin Yiyu followed her in.
"Snap." Qiao Xuejun turned off the lights.
But the greenhouse, originally tightly covered by fish skin, did not fall into darkness. Soft light shone from several bottles protruding from the side of the greenhouse, illuminating almost the entire greenhouse.
Jin Yiyun stood there, looking at the ceiling in surprise: "It really works!"
Although the light is not strong and is very soft, it is a completely different feeling from no light.
Jin Yiyun looked at it again and again: "What is this called? A pauper's lamp? How did they come up with this? Such a simple thing, yet so effective!"
Qiao Xuejun was also quite satisfied with the effect. Even if there was no reward, it could save electricity during the lunch hours. What's wrong with that?
System: "Congratulations host! The professional plant light has been unlocked. Please confirm to receive the reward!"
Qiao Xuejun looked at the system's redemption interface and found that in addition to the previous gift package rewards, there were indeed a batch of plant lights.
It says that these materials are enough to build 4 greenhouses.
Qiao Xuejun: "So fast."
System: "Since integrating with Shen Xingtang's system, my energy has become much stronger. Host, I still want to continue absorbing it."
Qiao Xuejun: “…”
"There's a chance."
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