Chapter 80

Qin LAN took a list of many goods and materials, but these goods and materials need Chen Xin to exchange with vegetables produced by his refuge. The list also lists the appropriate exchange ratio after discussion by the special police team.

Of course, Chen Xin has no objection to material exchange, which is also very good for him, but he has different opinions on the proportion of material exchange.

"Five bags of cement in exchange for one hundred catties of fresh vegetables? This ratio is acceptable. " Chen Xin looked at the exchange ratio marked on the list and checked one by one: "but is the steel bar a bit exaggerated? How can you change a steel bar with 20 jin vegetables

Reinforcement is very useful for Chen Xin. Besides, reinforced concrete is necessary to reinforce the gate of the shelter.

"What we provide is the standard steel bar of φ 12x12, and ah Xin, as you know, there is no steel factory in this city, all of which depend on Railway input. It's understandable that the price is a little more expensive." Qin LAN explains to Chen Xin.

Although they used to be girlfriends and girlfriends, they obviously didn't worry about their past feelings when they were bargaining. They were both haggling.

"But only 20 jin vegetables can be replaced with a steel bar. The price is still out of line. I think 10 jin is an acceptable price." Chen Xin opens his mouth and cuts the proportion of exchange in half, but his eyes look at Qin LAN, waiting for her to bargain.

Sure enough, Qin LAN shook his head and refused directly: "ten jin is too little, 18 Jin at most."

However, Chen Xin did not give up, still repeated: "ten jin, or I'll go to someone else for it."

"It's impossible, even if you put it before the disaster, you can't exchange ten jin cabbage for a steel bar." Qin LAN shook his head, but still made a compromise: "15 Jin, no less."

Hearing what Qin Lan said, Chen Xin laughed and said to her, "one step back, 12 Jin. First get me 50 steel bars. I need them urgently."

"In urgent need? Xin, what are you doing? Need so much steel? " As soon as Qin LAN heard that Chen Xin was in urgent need, she was curious.

Chen Xin said directly: "it's been three months since the end of the world. The temperature is almost freezing. I'm going to reinforce the gate of the shelter before it freezes. So in addition to steel bars, we also need cement, sand and steel plates. I can accept the exchange ratio of these building materials. Let's ship them together as soon as possible. "

Hear Chen Xin said is to be used to strengthen the shelter gate, Qin LAN clearly nodded, very happy agreed to come down.

Now the official shelters are also undergoing large-scale expansion work. All the shelters are allocated a large amount of construction materials. Chen Xinyao's supplies are not large. The special police team only needs to get a little out of their own supplies to meet his needs.

After negotiating the demand for building materials, Chen Xin put forward another demand that was not on the list: "Alan, can you help me get some glass? It's better to have a big glass tube like a cylinder. It's better to have an aquarium of this shape. Besides, there's a vacuum pump. "

"Yes, I can, but what do you want with these things, Xin?" Qin LAN asked strangely.

Chen Xin explained with a smile: "the aquarium can be transformed into the proposed algae oxygen generator. Living in an underground shelter will definitely have oxygen problems. I need one myself, and longniang also needs one. I can make one for her to exchange all her good wine. Drinking in cold weather can keep her warm."

"You're not a hairy boy. What are you doing drinking to keep warm?" Although Lan Qin make complaints about this, he still promised Chen Xin's request, and wrote down what Chen Xin wanted in his little notebook.

They checked the exchange ratio of all kinds of materials on the list again, as well as several items of materials added by Chen Xin, which ended the bargaining between them.

At the end of the bargain, the topic between the three became much easier. Chen Xin also asked about some topics he was interested in.

"What's the main food in the shelter now? Isn't it really mouse, earthworm and mushroom soup? " Chen Xin made a joke.

But mice, earthworms and mushrooms are indeed suitable for raising animals and plants in low temperature and dark underground environment, and they are also the main food sources of shelters announced by the state before the disaster.

For this problem, Ding Ning just shrugged and leaned on the sofa in Chen Xin's living room: "I just avoided the difficulty recently. I'm not very clear about it, but what I eat is basically mouse meat stewed with potatoes and mushrooms, but it's strange that rice can still be full."

"the state has gathered a lot of rice before the disaster, and now it is not surprising that steamed rice is eaten." Qin LAN knows more about the situation than Ding Ning, so she explained to Chen Xin: "as for mushrooms and potatoes, mushrooms are the things that are planted in every refuge at present. The yield of mushroom sachets provided by the state is good. Now they can be harvested once a month. If the planting area is not enough, in fact, mushrooms alone can meet the needs of food."

At this point, Qin LAN stopped for a moment and then continued: "as for potatoes, the country has not popularized them in a large area. Although they are high-yield, the demand for soil and fertilizer is also high, which is not as stable as that of mushrooms.Moreover, water and electricity are consumed, and the general shelters do not have the conditions for large-scale planting, so the city has opened up a special underground planting area near the power plant to grow potatoes, and the yield is not too high. "

Chen Xin heard Qin LAN say so, also understand of nod.

In fact, when he built the shelter, he first thought of planting potatoes.

Thanks to the movie Mars rescue, everyone knows that potatoes can survive, so they feel that in the end, shouldn't potatoes be planted at this time?

Especially in all kinds of travel novels, in addition to burning glass to make soap, looking for potatoes is almost a must.

It seems that everyone thinks that this is a miracle. For traditional agriculture, the yield per mu of several thousand jin of crops may not be as high as one tenth of that of potatoes, which is undoubtedly a blow to dimension reduction.

Potatoes do have many advantages. First of all, the yield is high. It seems that the yield of several thousand jin per mu is very common for potatoes.

Secondly, potatoes are very suitable for growing in alpine regions. Mongolia and Siberia are the main producing areas of potatoes. It can still grow healthily in the environment of temperature below 10 degrees, and it does not need too much water irrigation to ensure high yield.

And potatoes are also rich in nutrition, rich in starch, in cold environment can provide a lot of heat and nutrition for the human body, is indeed an important food to maintain life.

But potatoes are not perfect.

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