I make a popular science video and all the emperors learn from it!

【The value of potatoes. 】

Potato tubers contain a variety of vitamins and inorganic salts, which can prevent scurvy and stimulate hematopoietic function; inorganic salts are indispensable elements for human health and the development and growth of young children, which are conducive to protecting cardiovascular and cerebrovascular health and promoting the health of the whole body. 】

[Potatoes are rich and complete in nutrients, and their rich vitamin C (ascorbic acid) content far exceeds that of grain crops, and their higher protein and sugar content greatly exceed that of ordinary vegetables. Potatoes are nutritious and have a reasonable structure, especially the protein molecular structure is basically the same as that of the human body, which is easily absorbed and utilized by the human body, and its absorption and utilization rate is almost as high as 100%. Some nutritionists have pointed out that "eating only potatoes and whole milk at every meal can get all the nutrients that the human body needs", so to speak: "potatoes are close to full price nutritious food." "】

[Potatoes have high yields and rich nutrients, and are crops that are used as both grain, vegetable, feed and industrial raw materials. In the southern part of Northeast China, North China, and East China, potatoes have become an important crop for rural prosperity as an early spring vegetable; in the southern part of East China and most of South China, potatoes are rotated with rice as winter crops, and the export of fresh potatoes can obtain great economic benefits; and in the northwest and southwestern mountainous areas, potatoes play an important role as the main food crop. 】

[Potatoes are sweet and flat. Return to the stomach and large intestine meridians. It has the effects of good qi, spleen, stomach, detoxification, and swelling. The "Compendium of Materia Medica" records that potatoes can treat spleen and stomach deficiency, shortness of breath and fatigue after illness. Potatoes have the effects of stomach, spleen, and qi, which can prevent and treat a variety of diseases, as well as detoxification and anti-inflammatory effects. 】

[Tips:].

[The skin of potatoes is blue or sprouted, which will contain excessive solanine, which is poisonous and inedible. 】

[The ten crops that have made the greatest contribution to mankind in popular science!].

[Second place: Potato science popularization is completed.] 】

[Three minutes later, the first place in popular science begins: hybrid rice!].

After reading the popular science content of potatoes at the end.

Ying Zheng pondered: "Eating only potatoes can meet the needs of the human body, isn't it the most suitable for military food." "

And such a surprise!

Compared to other grains, potatoes are easy to transport and easy for soldiers to carry.

When fighting, each soldier carries a few potatoes in his arms, which greatly reduces the pressure on logistics.

The most important thing is that the yield of potatoes is high enough!

Don't worry about the lack of food for the people in the country.

Another piece of information caught his attention.

"The skin of the potato is blue and the sprouts are poisonous. "

Ying Zheng read the popular science content again and confirmed that he was not mistaken.

This piece of information must come first.

After that, potatoes were popularized in Daqin, and the county government had to go to the village to publicize it.

He knew too well what the people were thinking, and if they ate poisonous potatoes in order to save food, the gains would outweigh the losses.

Three minutes passed quickly.

People of all dynasties looked at the sky expectantly.

Next up is the number one crop.

They are curious about what crops contribute the most to humanity.

[The ten crops that have made the greatest contribution to mankind in popular science!].

[Start the first place in popular science: hybrid rice!].

[Rice, commonly known as rice, is an annual aquatic herb of the grass family. 】

[Rice is one of the important food crops of human beings, and it has a long history of cultivation and consumption. Half of the world's population consumes rice, mainly in Asia, southern Europe and parts of tropical America and Africa. 】

[The total production of rice accounts for the third largest food crop in the world, lower than corn and wheat, but can sustain a large number of people. 】

[Huaxia is one of the origins of rice. 】

[The farmland in southern China is mainly paddy fields, and the grain crops are mainly planted with rice. 6,000 years ago, the Hemudu people domesticated rice, adding human factors to the simple relationship between plants and land. 】

[Rice likes high temperature, humidity, short daylight, and is not strict with the soil, and the paddy soil is the best. 】

[Rice propagation method:].

[The first step in germination is to dry the seeds, choose a sunny weather to expose the rice seeds to the sun for a day or two, but it should be noted that do not place the seeds directly on the cement floor, which will directly dry the seeds, it is best to prepare a tarpaulin, spread the seeds evenly on it, and turn the seeds from time to time to ensure that the sun is evenly dried. Drying seeds can increase the water permeability and light transmittance of seeds, as well as the effect of sterilization. After the seeds are dried, place the seeds in a dry, cool place and let them cool for later use. 】

[After the sun, it is to start the selection, the selection is mainly to select high-quality seeds, eliminate inferior seeds, so that the seedlings can grow robust and neat after sowing. You can use clean water to select seeds, first soak the seeds in water, and the seeds will sink after absorbing water, while the empty shell seeds will float, so that you can select high-quality seeds with full grains and improve the germination rate. 】

[There are many ways to soak seeds, common ones are day and night dew, intermittent soaking methods, drug soaking, etc., soaking seeds in warm water when soaking, generally soaking time in 24-48 hours, and if soaking time is more than 48 hours, it is not conducive to germination. The specific time depends on the variety and water temperature, and the seed is generally exposed to the standard. 】

[When germination, it is not advisable to put the seeds in a woven bag or place them in the sun, you can choose to use a double-layer sack, and the sack is best to be sterilized and sterilized to ensure the safety of germination, and the sack is soaked. Then put a layer of clean straw on the floor of the greenhouse environment, lay out the soaked sack, sprinkle the seeds evenly on it, and cover it with another sack. Or you can use a sack with good air permeability to directly put the seeds into it, keep the temperature between 35-38, turn over the heat when the temperature is high, and find a way to increase the temperature when the temperature is low. After one to two days, when the seeds can be exposed and the chest, the germination is successful, and the seeds can be sown. 】

【Cultivation techniques of rice:】

In addition to the traditional manual cultivation method, there are also highly mechanized cultivation methods. However, the following steps are still missing:

[Land preparation: Before planting rice, the soil of the paddy field must be turned over to make it soft, and this process is divided into three periods: rough tillage, fine tillage and cover leveling. In the past, animal power and ploughing tools were used, mainly water buffaloes to prepare the land, but machines were used to prepare the land. 】

[Rice transplanting: Carefully insert the seedlings into the rice field, and the grid is orderly. Traditionally, rice transplanting uses ropes, markers or wheels to mark the paddy field. When planting rice by hand, a rice separator is worn on the thumb of the left hand to help the farmer separate the seedlings and insert them into the soil. The climate in which the seedlings are planted is very important, and heavy rain will break the seedlings. In modern times, there are many rice transplanting machines, but in rice fields where the land is undulating and the shape is not square, manual transplanting is still required. Seedlings generally run in a north-south direction. There is also a more convenient way to throw seedlings. 】

[Fertilization: When the seedlings are pumped high and grow the first rice stem, it is called the tillering stage, during which fertilizer is often needed to make the rice seedlings grow strong and promote the fullness and quantity of rice in the future. 】

[Irrigation and drainage: Rice is more dependent on this procedure, upland rice is a dry field, the process of irrigation and drainage is different, but it is generally necessary to strengthen water irrigation after transplanting, when young panicles are formed, and during the heading and flowering period. 】

[Harvest: When the rice ears hang down, golden and full, you can start the harvest, in the past, farmers a bunch, cut with a sickle, and then tie up, use a threshing machine to separate the rice ears, modern harvesters, after the rice ears are rolled, directly separate the rice ears from the rice stems, and the rice ears become rice grains. 】

[Drying, deletion: The harvested rice needs to be dried, and the dried rice needs to be turned in time to dry the rice. Deletion is to remove impurities such as deflated grain, use an electric grain divider, windmill or manual shaking to divide the grain, and use the wind power to automatically screen out the full and heavy rice. 】

【......】

"Hybrid rice?".

Everyone was stunned after watching this popular science video.

Said good hybrid rice, how has it been popular science ordinary rice.

Nothing special looks like.

Far inferior to the previous sweet potatoes, corn and potatoes.

Why is it in the first place?

Is there a mistake?