C545 (2/2)
When the soil was carried in, Xue Lang began to introduce: ”Your Majesty, this is last year's soil, these are this year's soil, these are locust eggs! Your majesty, you can have a comparison
Just then, the palace people came to report Du Ruhui, Fang Xuanling and changsun Wuji!
Li Er publicized the people in. After the ceremony, they saw that Xue Lang was also there. After a brief pause, Du Ruhui saw Xue Lang, stepped forward and bowed: ”Ruhui has seen Xue's son-in-law for a long time, but he is well?”
Du Ruhui had received the favor of Xue Lang, so it was right to see him. However, Du Ruhui was no longer a scholar who had no money in the past. Now he is also an important official of the imperial court. Naturally, Xue Lang would not accept the gift calmly. He replied with a smile: ”thank you for your greetings. Everything is OK.”
After that, there will be no unnecessary words. Du Ruhui also knew the rumor that the son-in-law was not good at communication. Now he personally experienced it and felt that it was really profound.
Xiao Li was in a good mood for some reason. He coughed and said in a loud voice: ”before, Youyang presented a piece of sparring music. This is a big matter, so I urge you three to come in and discuss it after reading it.”
Then he asked the Chamberlain to take Xue Lang's Shuo down and show it to the three ministers. When the three men finished reading, their expressions were dignified. Xue Lang had no choice but to give the science popularization about what locusts were and why locusts were plagued by locusts.
The ancients knew that locusts were the result of extreme drought, but they didn't know enough about locusts, which led to the misunderstanding of locusts. They also thought that locusts were the scourge of heaven and were formed by fish and shrimp eggs. Since ancient times, China has always been a country based on agriculture. Locust disasters have done great harm to agriculture, from the emperor to the officials, all talk about locust color change.
Science is not omnipotent, and it is not enough to explain everything. For example, Xue Lang's Crossing Science cannot explain. But locusts and locust plagues can be explained clearly.
After the science popularization, he pointed to the soil in the basket and explained it. After that, he said frankly: ”these soil are all the soil that I dug in the Chuang Tzu of Princess and I, and near Chuang Tzu. We have a vast territory. In the last two years, where has been drought? Your majesty can send people to go and dig up some soil to come back, so that we can have a number of locusts in the coming year! ”
After that, he specially explained how deep the soil should be dug and where the soil can be dug to find the locust eggs hidden in the soil. Li Er asked people to write it down. After that, Xue Lang said, ”no other questions, right? If not, the minister will leave! ”
Du Ruhui looked at Xue Lang with a strange look in their eyes. The eldest grandson Wuji, the round faced elder brother, arched his hand to Xue Lang and said, ”Xue's son-in-law is invited. As for the prevention and control, it only needs chickens and ducks? It's just a matter of great importance. I can't help but try to prove it again. ”Xue Lang wrote it very clearly in Shuo, but he didn't write the principle because of the space. Considering that the ancients knew little about locusts, Xue Lang thought about it and explained simply in simple terms: ”with my current conditions, after I screened, the most suitable method is two, chicken and duck and trapping!”
In modern times, agricultural aircraft can also be used to spray pesticides and other measures. In the Tang Dynasty, Xue Lang did not have the ability to prepare pesticides. Of course, he could only consider it from the biological chain.
Xue Lang said: ”the first batch of locust eggs should hatch after spring, from March to April. They are called Summer locusts. Summer locusts will breed one, called autumn locusts. The eggs laid by autumn locusts will hatch after overwintering. Therefore, in terms of prevention and control, the greatest pressure is summer locust, and the key point is summer locust. There are many kinds of wheat growing in Guanzhong, and the most harmful is summer locust. As long as summer locusts are prevented, the harm of autumn locusts is not a worry! ”
The three ministers nodded again and again, Xue Lang continued: ”locusts are also insects. Birds eat insects, which is a well-known natural rule. Locusts exist year after year and have existed since ancient times. Why do they sometimes become plague of locusts, and sometimes they do not? Quite simply, climate affects not only locusts, but everything in the world. In fact, there are many natural enemies of locusts in nature. Birds and frogs like to eat locusts. In the past, when the climate was normal and not dry, locusts laid less eggs. In addition, birds and frogs preyed on them, which naturally would not cause disasters. When the climate is dry, birds and frogs Frogs, in particular, will bear the brunt of the impact. Originally, because of the drought, locusts lay more eggs. Frogs and toads have reduced their natural enemies by nearly half, which is more beneficial to the survival of locusts. Naturally, more locusts will grow up. In addition, locust disaster will be formed! Therefore, the prevention and control of locust disasters also need to start from the natural rules. Chickens and ducks are also birds and eat insects. As the natural enemies of locusts are reduced, we will increase the number of natural enemies of locusts artificially to achieve the purpose of reducing the number of locusts. It has been studied by some florists that about 2000 chickens and ducks can control more than 100 mu of locust disaster. Therefore, chicken and duck are the first choice for locust control! ”