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, and are beneficial to protecting cardiovascular and cerebrovascular health and promoting general health.】

【Potatoes are rich and complete in nutrients, and their rich vitamin C (ascorbic acid) content far exceeds that of grain crops; their higher protein and sugar content greatly exceeds that of ordinary vegetables. Potatoes are nutritious and have a reasonable structure. In particular, the protein molecular structure is basically the same as that of the human body and is easily absorbed and utilized by the human body. Its absorption and utilization rate is almost 100%. Some nutritionists have pointed out:"Eating only potatoes and whole milk with each meal can obtain all the nutrients needed by the human body." It can be said:"Potatoes are a nutritional food that is close to full price."】

【Potatoes have high yield and rich nutrition. They are crops used as grain, vegetables, feed and industrial raw materials. In the southern part of Northeast China, North China and East China, potatoes as an early spring vegetable have become an important crop for rural prosperity; in the southern part of East China and most of South China, potatoes are used as a winter crop in rotation with rice, and the export of fresh potatoes can bring great economic benefits. ; In the northwest and southwest mountainous areas, potatoes play an important role as the main food crop.】

【Potatoes are sweet in taste and neutral in nature. Returns to the stomach and large intestine meridians. It has the effects of benefiting qi, strengthening the spleen, harmonizing the stomach, detoxifying, and reducing swelling."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 harmonizing the stomach, strengthening the spleen, and replenishing qi. They can prevent and treat many diseases. They also have detoxification and anti-inflammatory effects.】

【Kind tips:】

【If the potato skin turns green or sprouts, it will contain excessive solanine, which is toxic and cannot be eaten.】

【The ten crops with the greatest scientific contribution to mankind!】

【Second place: Potato science popularization completed】

【Three minutes later, the number one science popularization begins: hybrid rice! 】

After reading the last popular science content of Tudou.

Ying Zheng thought deeply:"Eating only potatoes can meet the needs of the human body. Isn't it the most suitable as military food?"

There is also such an unexpected surprise!

Compared with other foods, potatoes are easier to transport and easier for soldiers to carry.

During a war, each soldier carries a few potatoes in his arms, which can greatly reduce the pressure on logistics.

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

Don’t worry about the people in the country not having enough to eat.

Another message caught his attention

"Potatoes with green skin and sprouts are poisonous."

Ying Zheng read the popular science content again to confirm that he had read it correctly.

This piece of information must be given top priority.

Later, if potatoes are to be popularized in Da Qin, the county government must go to the villages to promote it.

He knows very well what the people think. If In order to save food, I ate poisonous potatoes, which was not worth the loss.

Three minutes passed quickly.

People from all dynasties looked to the sky expectantly.

Next was the number one crop.

They were curious about which crops made the greatest contribution to mankind.

【The ten crops with the greatest scientific contribution to mankind!】

【Let’s start with the first popular science: hybrid rice!】

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

【Rice is one of the most important food crops for mankind, and its cultivation and consumption have a long history. Half of the world's population eats rice, mainly in Asia, southern Europe and parts of tropical America and Africa】

【The total output of rice ranks third in the world's food crop output, lower than corn and wheat, but it can sustain the lives of a larger population.】

【China is one of the origins of rice】

【Most of the farmland in southern China is paddy fields, and rice is the main food crop. 6,000 years ago, the Hemudu people domesticated rice and added human elements to the simple relationship between plants and land.】

【Rice likes high temperatures, high humidity, and short days, and is not strict with soil. Paddy soil is best.】

【How to propagate rice:】

【The first step in germination is to dry the seeds. Choose a sunny day and expose the rice seeds to the sun for a day or two. However, be careful not to place the seeds directly on the cement floor, as this will directly kill the seeds. It is best to prepare a tarpaulin. , spread the seeds evenly on it, and turn them from time to time when drying to ensure even drying. Drying the seeds can increase the water and light transmittance of the seeds, and also has a sterilizing effect. After drying, place the seeds in a dry, cool place and let them cool for later use.】

【After the seeds are sun-dried, seed selection begins. The main purpose of seed selection is to select high-quality seeds and eliminate inferior seeds, so that the seedlings can grow strong and neatly after sowing. You can use clean water to select seeds. Soak the seeds in water first. After the seeds absorb water, they will sink, while empty shell seeds will float. In this way, you can select high-quality seeds with full particles and increase the germination rate.】

【There are many methods of seed soaking. Common ones include day soaking and night dew soaking, intermittent seed soaking method, drug soaking, etc. When soaking seeds, soak the seeds in warm water. Generally, the soaking time is 24-48 hours. If the soaking time exceeds 48 hours, it will be detrimental to germination.. The specific time depends on the variety and water temperature, and is generally based on the appearance of white seeds.】

【It is not advisable to put the seeds in woven bags or expose them to the sun during germination. You can choose to use double-layered sacks. The sacks should preferably be sterilized to ensure safety during germination. Soak the sacks. Then put a layer of clean straw on the ground of the greenhouse environment, spread the soaked sacks, sprinkle the seeds evenly on top, and then cover it with another sack. Or you can put the seeds directly into the sack with good air permeability, and keep the temperature between 35-38°C. When the temperature is high, you need to turn it in the middle to dissipate heat. When the temperature is low, you need to find ways to increase the temperature. After one to two days, when the seeds can be exposed and white, the germination will be successful and you can sow.】

【Rice cultivation technology:】

【In addition to traditional manual farming methods, there are also highly mechanized farming methods for rice farming. But still keep the following steps:】

【Land preparation: Before planting rice, the soil in the rice field must be turned over to make it soft. This process is divided into three stages: coarse tillage, fine tillage and leveling. In the past, animal power and plows, mainly buffaloes, were used to prepare and plow the fields, but now more and more machines are used to prepare the fields.】

【Transplanting: Carefully insert the seedlings into the rice field in an orderly manner. The traditional rice transplanting method uses ropes, rice marks or rice transplanting wheels to mark the rice fields. When transplanting rice seedlings by hand, a rice divider is worn on the thumb of the left hand to help farmers separate the rice seedlings and insert them into the soil. The climate for transplanting rice seedlings is very important. Heavy rain will damage the rice seedlings. In modern times, rice transplanters are often used for rice transplanting, but in rice fields with large undulations and non-square shapes, manual rice transplanting is still required. Seedlings generally run north-south. There is also a more convenient method of throwing rice seedlings】

【Fertilization: When the seedlings grow taller and grow the first section of the rice stem, it is called the tillering stage. Fertilization is often required during this period to make the rice seedlings grow strong and promote the fullness and quantity of rice in the future.】

【Irrigation and drainage: Rice relies more on this process. For upland rice, it is a dry field, and the process of irrigation and drainage is different. However, it is generally necessary to strengthen water irrigation after transplanting, when the young ears are formed, and during the heading and flowering period.】

【Harvest: When the ears of rice hang down and are golden and plump, the harvest can begin. In the past, farmers cut them off bunch by bunch with a sickle, tied them up, and used a threshing machine to separate the ears of rice. In modern times, there are harvesters to separate the rice ears. After the ears are rolled in, the rice ears are directly separated from the rice stems, and the rice ears become rice.】

【Drying and selection: The harvested rice needs to be dried, and the rice needs to be turned in time to dry it. Deletion involves removing impurities such as deflated grains, using an electric splitter, windmill or manual shaking to separate the grains, and using wind power to automatically screen out the full and heavy rice.】

【......】

"Hybrid rice?"

Everyone was confused after watching this popular science video.

The hybrid rice was said to be popular, but why is it always popularizing ordinary rice?

It doesn't look special. It is far inferior to the previous sweet potatoes, corns and potatoes.

Why is it ranked first? Where is one?

Is there a mistake?