A sixty-pound bucket of refined salt is simply a sky-high price. However, it was normal in this period of the early Tang Dynasty. Now due to the rise of the Turks, green salt has been almost completely blocked, and the output of tribute salt is extremely low.

There were not many wealthy noble families in the Tang Dynasty.

Under such circumstances, the supply of refined salt naturally exceeds demand.

Although it is only snow salt, which is relatively inferior among refined salts, countless people are snatching it up.

Especially when Li Ming has fixed the quantity of refined salt sold at one hundred kilograms, sixty pounds per bucket is not unacceptable.

Of course, it is almost impossible to maintain this kind of price forever. After all, once the Turks are defeated, the production of green salt can resume. At the same time, as the Tang Dynasty gradually stabilizes, the output of refined salt in various places will gradually enter a stable state.
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Although the price of refined salt will still be high, it will gradually return to a reasonable price.

It is basically impossible to have such a high profit in the future.

Of course, even if it is completely restored, the profit of refined salt will be more than ten times.

It can last for a long time.

As long as the refined salt purification technology is not leaked, it can continue to be used.

Of course, Li Ming has no interest in using this thing to make money on a large scale.

Now, he only thinks of this thing because the young master is short of money.

Otherwise, he might not even touch it in a short time.

So after giving the instructions, he stopped paying attention to the salt.

It was handed over to the dozen or so people in the courtyard for extraction, and the Shaofu Supervisor was responsible for selling it.

And he cast his sights on a new thing.

Coming to this world, if there is anything that makes Li Ming almost unbearable, it is that there are almost no vegetables in winter. Even in the palace, there are almost no vegetables that can be eaten.

And according to what the attendant said, if you want to eat vegetables, you may have to wait until at least April or May next year.

Now there are at least four or five months left.

This is simply terrible.

In this situation, Li Ming suddenly remembered the items he signed in a few days ago.

"Greenhouse breeding technology."

That’s right, it’s greenhouse farming technology.

Greenhouse vegetables refer to vegetables grown by covering the greenhouse with plastic film, which can artificially control the vegetable market season. Using greenhouses to cover plastic film to grow vegetables is to artificially create a suitable ecological environment, adjust the vegetable production season, regulate market demand, and promote

High quality and high yield vegetables.

In later generations, this thing became almost extremely common.

In this era, this thing almost does not exist.

At this time, when the young master was no longer short of money, Li Ming couldn't help but come up with this idea.

On the one hand, this thing allows him to taste vegetables out of season, and on the other hand, it can also give the young man an extra income.

Winter vegetables are not much cheaper than refined salt.

As for construction.

That would be even simpler.

This thing is not a high-tech thing. The only troublesome thing is the plastic film, but there are a lot of these things in the past, and now it can be used.

Therefore, after the Shaofujian sold refined salt for the second time.

He just started taking action.

A large number of craftsmen were summoned to start building the framework.

In the future, the frames of greenhouses will generally be divided into bamboo and wood frames and prefabricated galvanized steel pipe greenhouses.

Bamboo greenhouses use bamboo poles and wood as arch materials. The advantages are that it is easy to obtain materials, convenient to construct, and low cost. The disadvantages are that the arch frame has low strength, poor resistance to wind and snow, and is easy to decay. It needs to be repaired and replaced every year, and operation and management are not convenient.

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The prefabricated galvanized steel pipe greenhouse uses hot-dip galvanized thin-walled steel pipes as the arch material. The advantages are high strength, strong wind and snow resistance, good anti-rust performance, high light transmittance, easy operation and management, etc., and a service life of up to 10-

15 years.

Nowadays, it is basically impossible to install a prefabricated galvanized steel pipe greenhouse. Although Datang produces steel, the steel production is not enough for the army. How can it be used to build a greenhouse? Then the only choice is bamboo and wood frames.

On a farmland.

A famous craftsman started working quickly according to the drawings.

The Shaofu's mobilization ability is undoubtedly strong.

And more importantly, the Shaofu lacks nothing.

From personnel to materials to places, everything is ready.

It was only the next day that we were ready and started taking action.

"The orientation of the shed should be north-south, and try to avoid building the shed diagonally."

"The shed is one to one-and-a-half feet wide, ten to twenty feet long, and one foot high."

......

After speaking, Li Ming directed everyone to start working, and before his eyes, several greenhouse frames began to be gradually built.

This time Li Ming built ten greenhouses in one go.

After all, he still had a lot of plastic film to sign in.

And a famous craftsman is busy at speed.

Although greenhouse construction has never appeared before, it is still easy for the top craftsmen of Shaofu in this era.

And in the midst of busyness.

Time flies by in the blink of an eye.

Five days passed quickly.

Ten greenhouses were gradually built in the fields.

The plastic film for signing in is also laid directly on it.

At this moment, the greenhouse is completely constructed.

In the previous life, mature winter vegetable production facilities were still winter-heated solar greenhouses. Under the condition that the minimum temperature did not exceed minus 25 degrees, heat-loving fruits and solanaceous vegetables could be produced normally without heating. If

If the temperature is still lower, appropriate heating is needed. For example, in the northern part of Inner Mongolia, the northern part of northwest, and some parts of northern Xinjiang, appropriate heating is needed. If there is no heating in these places, it will only be possible to survive the coldest winter.

It’s time to produce a crop of fast-growing leafy vegetables that can withstand low temperatures.

But obviously it is impossible to have heating equipment in this era.

However, you can also use local methods.

Even less fire is enough to raise the temperature of the greenhouse quickly.

In addition, this is not in the north or northwest, so it doesn’t need too much warming.

Add some straw and some fire to achieve the heating effect.

Then you can start planting.

The time has just entered the end of December.

If you plant them now, you can basically have vegetables by the end of February.

Although spring has begun to bloom at the end of February, and it is even the planting season, it is almost impossible to eat vegetables.

At this time, Li Ming's vegetables are still extremely scarce.

Of course, what's more important is next winter.

By that time, his vegetables will be almost at the level of Wang Zha.

As long as he wants to, he can fish a bigger one directly with the help of vegetables.

And it’s different from the salt extraction technology.

Even if the greenhouse technology is leaked, there is no way to imitate it. They do not have plastic film, and without plastic film, it is impossible to ensure that there is enough warmth even if there is enough photo mask.

It can be said that this thing can continue to be used until the moment he really wants to popularize it.
Chapter completed!