Doomsday Bunker Upgrade Chapter 80: Poisonous potatoes

　　 First of all, potato planting has very strict soil requirements. Only the soil with deep soil layer, loose structure, good drainage and ventilation and rich in organic matter is the most suitable environment for potato growth.

　　 And it’s not over yet. Potatoes need more than ten kinds of nutrients for their growth and development, and there is a huge demand for fertilizers.

If a piece of land is continuously planted with potatoes, the soil fertility will be greatly reduced due to the absorption of soil fertility by potatoes. The continuous cropping plot will reduce the yield in the second year, and the quality of tubers will also decline, especially diseases, insects, grasses Harm will happen more severely.

Even the protagonist of "The Martian", when planting potatoes on Mars, reused the vacuum-dried excrement that the astronauts had saved before, and fermented it into manure before planting potatoes.

　　 More importantly, the stems and leaves of potato plants are poisonous, and even the potatoes themselves are poisonous.

Potatoes mainly contain solanine and chitosan, and the toxins are generally decomposed when heated to 170°C.

Although artificially cultivated potatoes are not highly toxic, if the consumption exceeds 1.4 kg, the accumulation of toxicity in the body will still produce a toxic reaction.

As for the solanine produced by potatoes after germination, it is a toxin that can be seriously poisoned if ingested 0.2-0.4g.

Especially for pregnant women, if you eat potatoes for a long time, the alkaloids contained in them may accumulate in the body and cause fetal malformations.

Before the disaster, of course, everyone can eat and plant potatoes as they please. After all, potatoes are indeed in large quantities, and as long as you pay attention to rotation and fertilization when planting, many problems in planting can be avoided.

But the toxin in potatoes is an unavoidable problem. After all, the end of the world is not like before the disaster. People can choose from a wide variety of foods, and they can eat many different foods. The abundant supply of materials can also make people always eat. to fresh potatoes, greatly reducing the risk of poisoning.

But there are no such conditions in the apocalypse. The underground land resources are limited. Basically, there will be only one kind of staple food to grow.

And this will lead to people eating potatoes for a long time.

In addition to the fact that the shelter cannot be eaten immediately, mildew and germination of the harvested potatoes are foreseeable during the storage process.

This must be thrown away before the disaster, no one will eat the sprouted potatoes.

　　 But in the last days, these are important food reserves. Rats, cockroaches and earthworms are all used to eat. How many broken potatoes? As long as it is undead, you can eat it when it is cooked!

So at this time, the toxin in potatoes is a problem that cannot be ignored.

　　Considering from the national level, if you need to choose a staple food of the end at this time, potatoes will obviously not be the best choice, especially when a lot of sunlight is needed to grow potatoes.

　　Chen Xin chose dry rice as his main food source for refuge because of these factors.

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After sending Qin Lan and Ding Ning away, Chen Xin cleaned up the place and sat in front of the workbench.

　　 While taking out the pistol that I had just exchanged from Qin Lan, and placing it on the workbench, he pressed the bullet into the magazine, while also thinking about making an oxygen generator for Mo Qingyan.

　　 Although he chose a very simple and rude production method when he got himself an oxygen concentrator, and later relied on system upgrades to obtain the oxygen concentrator, this approach was still too extensive.

　　 And the too simple oxygen generator he made before is really not worth mentioning in terms of efficiency, and the efficiency of using light energy is still very low.

However, after the system upgrade, even Chen Xin's simple and crude oxygen concentrator is now decent.

Chen Xin chose to upgrade the second plan. The original square plastic box became a straight hollow round tube. The fill light was directly installed in the hollow part of the round tube, and irradiated directly from the inside. The utilization of light energy to achieve maximum efficiency.

The algae are directly raised in the circular tube for reproduction, and the oxygen produced will be discharged from the top, while the bottom has pores to inject carbon dioxide.

　　The settled algae corpses will be filtered during the water cycle to recover biomass, which is used to generate methane for fuel cell power generation.

　　 After the upgrade, this whole system has become a green cylinder two meters high. The light faintly shines through the cylinder, and the entire cylinder is full of algae.

The oxygen produced by such a device can maintain the needs of a normal person's survival. As for the electricity generated, it can maintain the energy consumption of the entire set of devices except for the fill light, and there is a slight surplus.

After all, under normal circumstances, the algae oxygen production technology relies on sunlight to promote algae photosynthesis. Now that there is no sunlight, this part of the energy consumption of the fill light must be supplemented by other energy sources.

　　 Mo Qingyan’s refuge has the power and water supply in the urban area. Although it is available for a limited time, it is not a problem to maintain the operation of the equipment.

　　 pressed the bullets into two magazines, and Chen Xin inserted one of the magazines back into the pistol.

　　 held this gun and felt it, he inevitably took out the pistol he had made, and placed the two guns on the workbench for comparison.

　　Compared with the pistol made by Chen Xin~IndoMTL.com~The pistol Qin Lan gave him is obviously larger in caliber, but lighter in weight. This is because Yan Guo used it when manufacturing QSZ92G semi-automatic pistol. Engineering plastic is used as the handle, which reduces a lot of weight.

As for other performance differences, Chen Xin can't compare the quality of the two guns without actually taking out dozens of bullets, which requires professional knowledge and experience in using firearms.

After some consideration, Chen Xin decided to use the pistol he obtained from Qin Lan as a weapon for his usual self-defense, while the pistol he made himself was kept in the bedside table in the bedroom as a spare.

This is also a security strategy, and having weapons and equipment at the nearest location is a good way to improve your ability to deal with danger.

　　 Although in Chen Xin's view, as long as the door is closed in his refuge, and there is no heavy firepower, it is difficult to cause any security problems that he needs to use guns to deal with.

　　 But be prepared. In case of any problems, it is important to have a gun in your hand.

　　 After finishing this, Chen Xin took his bow out of the weapon cabinet again.

　　 Archery was only a hobby cultivated by Mo Qingyan before, and it had no practical use.

　　 And in the end, the role of the bow and arrow is greatly reduced after having the gun. In a sense, the existence of this bow has become tasteless.

　　 What's more, as the outside temperature drops, the maintenance of the bow and arrow itself becomes a problem if it is used out.

So Chen Xin plans to see if the bow can be used for other purposes after the upgrade. If possible, he plans to upgrade the bow into a crossbow and install it at the upgraded gate to use it as a defense facility.

Maybe you can't backstab with a crossbow, but it didn't say you can't use a crossbow as a mechanism.