Back to 1980: Please Love Me Again

Chapter 272 Off-Season Vegetables

Mishan County, Bawuliu Farm.

Greenhouse cultivation has a history of more than 2000 years in China, and modern domestic greenhouses began in Changchun.

The earliest accurate record of greenhouse planting in China was in the Western Han Dynasty.

"Hanshu Biography of Zhao Xinchen" records that Zhao Xinchen once played to the Emperor Han Yuan: "The Taiguan Garden planted winter onions and leeks, covered the roof, and burned a warm fire day and night, and waited for the temperature to grow. These things are all out of season, and they are harmful to people, so they are not suitable for offering."

This passage means that it is the midwinter season, and in the Taiguan Garden of Chang'an Royal Garden, a sealed roof is built, green onions, leeks and other vegetables are planted, and the room temperature is raised by burning fires day and night, so that the vegetables are warm in the midwinter season. It can also grow, and it is "an untimely thing", so it is "not suitable for offering".

This historical material fully proves that in the Western Han Dynasty, my country already had the prototype of a modern greenhouse, which could grow off-season vegetables such as onions and leeks.

And these off-season vegetables are exclusively for the privileged class such as the powerful and the rich.

In this day and age, small batches of off-season vegetables are also available. However, the main vegetables that the general public, especially northerners, can eat for more than four months in a whole winter are radishes and Chinese cabbage.

Even in the late 90s, these two dominated the winter table of northerners, accounting for at least 80% of the share!
In addition, there are only some dried vegetables such as dried beans and vegetables that are easier to cultivate, such as garlic yellow and chives.

For example, Liu Sufang, the wife of Zhao Wenmu, grows garlic yellow every year.

Choose some plump, disease-free garlic, soak it in clean water for about two days, and then put it in a ventilated environment to let it germinate.

The germinated garlic is placed in clay pots or old iron buckets that I don’t know where to find, put some sandy soil, spray some water from time to time to keep the soil moist, and then use grass thatch to shade it.

As long as you keep growing in the dark, you will be able to harvest ripe yellow garlic in no time.

Of course, clay pots and tin buckets must be placed in the warmest bedroom or next to the stove.

This is because Zhao Wenmu's life has been better in the past few years, and the family can burn coal for heating every winter.

Otherwise, according to the past, the bedroom will freeze in winter, and it will not be possible to plant at all!

Modern greenhouses were born abroad, the reason is very simple, the inevitable result of technological progress.

After the production of high molecular polymers such as polyethylene, plastic films gradually shine in the agricultural field.

my country realized the independent production of polyethylene in the 50s, and gradually introduced plastic sheds into the agricultural field.

That is, the "small arch shed" that many people know. For example, the small arch shed is widely used in the cultivation of ginger and green onions in Weixian area.

The greenhouse in the modern sense first appeared in Changchun.

In 1966, in the suburbs of CC City, the small arched shed was first transformed into a 2-meter-high square shed.

After continuous improvement, a vaulted greenhouse with a height of about 2 meters, a width of 15 meters and an area of ​​1 mu was finally created.

This is also a real greenhouse!
In 1970, it began to be promoted to all parts of the north. In 1976, 29 greenhouses of different specifications were built in the suburbs of TY City, providing a wealth of experience for the greenhouse structure and construction scale.

By 1978, greenhouses had been extended to all parts of the South.

In the 80s, Han Yongshan, a farmer in Wafangdian, Liaoning, invented a string-like earth wall greenhouse in his backyard, which greatly enhanced the wind resistance of the greenhouse. It does not require fossil fuels, and the temperature inside the greenhouse can be reduced by relying only on sunlight. Keep it above 20 degrees.

Many people may say, where is this stringed greenhouse with an earth wall on one side (usually the shady north wall)?Isn't it very advanced, why is it almost invisible now?

That’s because with the wide application of supporting materials such as steel structures, the wind resistance and pressure resistance (heavy snow) of greenhouses have long been different from what they used to be. .

It is no exaggeration to say that greenhouse technology was born in Changchun, explored in Taiyuan, and made a breakthrough in Liaoning.

The following story is familiar to many people, that is, Shouguang County Party Committee Lixian Corporal hired Han Yongshan as an agricultural consultant to vigorously develop greenhouse planting, and finally made Shouguang a vegetable basket in China.

The legend of transporting vegetables by plane was born here.

Therefore, the technology of greenhouses has actually been born long ago, but the actual conditions determine that it is rarely used at present.

Zhao Wenmu also thought of this when he saw that almost every household on the Bawuliu Farm had a small plastic shed.

In the Mishan area at a high latitude, the winter is much longer than in Pingyang County, Zhao Wenmu's hometown. Therefore, for more than half a year, the local people cannot eat vegetables grown outdoors.

It is precisely because of this that the local people have a paranoid pursuit of increasing the vegetable planting time.

This is why modern vegetable greenhouses were born in the north, not in the more developed south.

Nothing else, just a very simple theory in economics, demand determines supply.

Noticing the plastic sheds in front of almost every household, Zhao Wenmu naturally thought of plastic sheds.

After all, he had seen the spectacular scene of vegetable greenhouses in Shouguang and Zhucheng in his previous life.

With a speed of more than 300 kilometers per hour, the Harmony is speeding from west to east. There are endless plastic greenhouses on both sides of the window, sparkling in the sun, like a vast ocean.

And this kind of scenery will last for more than ten minutes.

Just the two sides of the railway are like this, one can imagine what kind of vegetable greenhouses exist in Shouguang!
Whether the weather in Shouguang is good or not will directly affect the price of vegetables in China. This saying is by no means a joke.

Thinking of the scenery of Shouguang in his previous life, Zhao Wenmu couldn't help slamming his lips a few times, if only his hometown could get a share of the pie.

Pingyang County has many mountains and less arable land, and its natural conditions are far inferior to Shouguang. Even if it develops greenhouses with all its strength, it will not be able to replicate the scenery of Shouguang in the previous life.

But precisely because of this, shouldn't greenhouses be developed?

Let a small amount of arable land play a greater value, so that farmers can have more income.

The output value per unit area of ​​the greenhouse is more than ten times that of ordinary cultivated land!
As long as you have the first-mover advantage and always walk ahead of others, you can turn disadvantages into advantages.

Others grow at room temperature, and you grow greenhouses; others also build greenhouses, and you grow new varieties of vegetables; others also grow new varieties, and you grow green and pollution-free; others also grow pollution-free, and you create explosive products yourself.

For example, avocados, cherries, and sugar oranges, after some publicity and operation, the value has increased tenfold and hundreds of times.

In this way, others will never see your taillights, and can only follow behind to suck the exhaust!
Dry!That's it!

After thinking through all this, Zhao Wenmu looked at Yegrove with fiery eyes.

This kid has learned a lot from his father.

In the future, he can be sent to Changchun and Taiyuan to learn Buddhist scriptures.

As for Zhao Wenmu, he only knows the development direction of plastic greenhouses, and there will even be more high-tech greenhouses such as glass greenhouses, multi-span greenhouses, automated greenhouses, and photovoltaic greenhouses in the future.

As for the specific technical details of the greenhouse, he knew nothing about it.

It doesn't matter, professional things are left to professional people to do!
You win!
(End of this chapter)