Entering the Li family's mansion, Su Jian has been following behind Ma Zhou, walking all the way, and the people Su Jian saw in the Li family have given Su Jian another level of understanding of Li Zhan.

Su Jian really didn't know that there was such a big man as Li Zhan hidden in Chang'an City.

At this time, Su Yan was very glad that that night, his attitude towards Gao Hu!

"Childe... The crown princess's father is here. Coming to the hall, Ying Lao whispered in Li Zhan's ear.

Li Zhan looked at Su Yan behind Ma Zhou with a smile, and then Li Zhan got up and smiled: "Su Shilang is also here... Come... Come... Come...! Li Zhan beckoned to Su Yan and said to the others at the table: "The prince's father-in-law is here, but the prince hasn't arrived yet, let him sit next to me." ”

Su Yan was flattered after hearing this, because the people sitting at the same table with Li Zhan were basically big people he had never thought of contacting.

With a hint of excitement, Su Yan came to Li Zhan's side and sat down, and followed Su Jian to listen to Li Zhan's somewhat drunk words: "Su Shilang is free, here are all his own people, Su Shilang can come here, then we are all our own people." ”

"Thank you, Childe...!" Su Yan hurriedly raised his wine glass.

This night... Before the prince arrived, Su Jian drank too much, because the bad guys on the table toasted Su Jian one by one, Su Jian was overjoyed, he didn't dare to play tricks like Li Zhan, so he really drank one by one.

You must know that Su Yan's alcohol consumption is not good, and when he drinks the tenth glass, he will not be able to.

Fortunately, at this time, the prince came with the crown princess and the prince's side concubine, and as soon as the crown princess Su Wan came, she saw her father's unconscious appearance.

Li Chengqian laughed and said, "Big brother... How did you drink my father-in-law like this? ”

The crown princess Su Wan hurriedly came to her father's side, Li Zhan said with a smile: "Help him to go to the guest room to rest, today is his boss here, he should drink more." ”

"The slave knows...!" Su Wan hurriedly responded, you must know that the crown princess's self-proclaimed should be the palace, but Su Wan claimed to be a slave in front of Li Zhan, which can be seen here Su Wan's respect for Li Zhan.

"Hmm... Go for it...! Li Zhan smiled and nodded.

Then I saw Su Wan take Su Yan away, as soon as Su Yan left, Li Chengqian sat down next to Li Zhan, at this time the eldest grandson Wuji asked: "Prince... How's the transfer of food going from the household department? ”

Li Chengqian nodded and said, "Uncle, don't worry... Half of it is done, and it should be all done tomorrow. ”

"Hey...!" With a sigh, Niu Jinda said a little uncomfortable: "I don't know how many people will die this time." ”

"What's wrong...?" Li Zhan didn't know what was going on yet.

Ma Zhou said at this time: "Childe... Just yesterday, Chang'an received a report that the severe drought in Hebei had affected hundreds of thousands of victims and land, and His Majesty issued an order to allocate grain to the disaster area.

However, this is only a palliative solution, food can be allocated for a while, but the drought will continue, with the occurrence of drought, spring planting, summer planting... There will be no harvest. ”

"Hey... I say... You civil servants really don't have any way, think of a way, save those victims...! Niu Jinda looked at the eldest grandson Wuji and Ma Zhoudao.

It's just that at this time, the eldest grandson Wuji and Ma Zhou could only bow their heads bitterly.

Not to mention the drought in ancient times, there is no way to solve the modern drought, many people say artificial rainfall, but human beings must have sufficient conditions if they want artificial rainfall.

Generally speaking, natural precipitation not only requires certain macro weather conditions, but also needs to meet the microphysical conditions in the clouds, such as: there must be large water droplets in warm clouds above 0°C; There must be ice crystals in cold clouds below 0°C, without this condition, no matter how good the weather situation is, no matter how good the cloud conditions, it will not rain.

However, in natural circumstances, such microphysical conditions are sometimes not available; Sometimes it is available, but it is not sufficient.

It can be seen that the former does not produce precipitation at all, while the latter receives very little rainfall.

Then, humans can use the following conditions to sow dry ice cores into clouds, so that the clouds produce condensation or condensation of ice-water transformation processes, and in this case, with the help of the natural collision process of water droplets, rainfall can be produced or increased.

In this way, artificial rainfall is also possible. However, if there are no sufficient conditions, precipitation will not occur even if it is artificially recatalyzed.

How did ancient monarchs solve the problem of drought?

1. Repair water conservancy, encourage people to use bucket trucks, overturned cars to draw water, and dig wells

2. Punish yourself and organize a rain begging ceremony.

3Shut down the state capital, send officials, and prepare relief for the victims

4. The only thing left is to resign to fate

There is really no other good way, according to historical records, drought in our country is frequent.

Historical books, local chronicles, court archives, inscriptions, inscriptions and other cultural relics.

In 206~1949 B.C., there were 1,056 droughts. From the 16th century to the 19th century, major droughts occurred in 1640, 1671, 1679, 1721, 1785, 1835, 1856 and 1877.

In 1640 (that is, the thirteenth year of Chongzhen of the Ming Dynasty), drought continued to occur for 4~6 years in different areas, and the dry area "dried up the bark and cannibalized"; In 1785 (i.e., the 50th year of Qianlong in the Qing Dynasty), 13 provinces were affected by drought, and it is recorded that "the bark of grass roots and trees was exhausted, the displaced people carried the road, the starvation was full of wilderness, and the dead were restless"; In 1835 (that is, the fifteenth year of Daoguang of the Qing Dynasty), 15 provinces were affected by drought, and there was an account of "gnawing grass and soil, starving and carrying the road, the people ate Guanyin powder, and there were many dead people".

Drought was synonymous with death in ancient times.

"You guys... It didn't work at all. Niu Jinda suddenly cried, here to explain, why Niu Jinda cried, because his family was starving to death, all the thought of the drought, many people had to have no food, Niu Jinda thought of his family, so a moment of sadness came from it.

Seeing Niu Jinda crying, Cheng Yanjin on the side also shook his head and said, "Your Majesty has already thought about making an edict against himself!" ”

"Guilty edict" is a kind of oral edict or document that ancient emperors introspected or reviewed their own mistakes and mistakes when there were problems in the imperial court, natural disasters in the country, and the safety of the regime.

In the second year of Zhenguan (628 AD), drought and locusts came, and the edict said: "If the year is abundant, the world will be peaceful, and the disaster will be moved, so as to save all the nations, it is also a wish, and I am willing to be unsparing." For the sake of food for the people, Li Shimin would rather God bring all the disasters to him alone.

Li Zhan was a little moved at this time and said, "But Your Majesty has already issued an edict of guilt." ”

"So what can I do?" Li Chengqian pursed his lips and said: "The great drought is destined to kill countless people, food cannot be grown at all, without food, people will starve, and the father can only sin himself." ”

Suddenly, Li Zhan looked at Li Chengqian and said, "Is that as long as there is a food that can tolerate drought, and the amount is full, then the drought will be solved." ”

"yes...!" The eldest grandson Wuji nodded and said, "But whether it's wheat or rice... Their demand for water is simply too great to grow in arid places. ”

"Not necessarily...!" Suddenly, Li Zhan looked at Li Chengqian with a smile and said, "Tell me, how many acres of sweet potatoes have been planted in your imperial village?" ”

"Clams... Sweet potato...! Li Chengqian was stunned.

............................ "Sweet potato...?" Li Chengqian was stunned for a moment, and immediately the little bean on the side immediately said: "Yes... Li Gongzi, sweet potatoes are planted very well in Huangzhuang...! ”

"You've been in charge?" Li Zhan looked at Xiaodouzi.

Xiao Douzi immediately nodded and said, "Yes, His Royal Highness the Crown Prince has given an important explanation to the slave maid, and the slave maid has to take time to go to the imperial village almost every month. ”

"Then tell me, how many sweet potatoes are in the Huangzhuang now?" Li Zhan asked with a smile.

At this time, Xiaodouzi thought hard and said, "It's about 180,000 catties...!" ”

After Xiaodouzi finished speaking, Li Zhan said slightly: "180,000 catties... It's still a little less, maybe the spring planting can't be achieved, and it should have to be moved to the summer planting. ”

"What is a sweet potato?"

Just when Li Zhan and Xiaodouzi were talking, Eldest Sun Wuji took a moment to ask?

At this time, Li Zhan said with a smile: "Sweet potato is a kind of grain, it is not only high-yielding, but also extremely adaptable, drought-resistant, in addition to being used as a staple food, it is also an important raw material for food processing, starch and alcohol manufacturing industry, stems and leaves can also be eaten."

No matter how barren the land is, "one acre of dozens of stones, twenty times better than the valley"

"Really...?" Li Zhan's words made everyone present show a shocked expression, "One acre and dozens of stones, twenty times better than seed grain" This is a very terrible sentence.

However, Li Zhan did not answer everyone's questions, and Xiaodouzi on the side immediately bowed down and said, "Ladies and gentlemen... Li Gongzi didn't say big things, but said that the sweet potatoes we planted in Huangzhuang because the land may be relatively fertile, three thousand catties per acre. ”

"Three thousand catties per acre...?" The crowd was out of shape again.

Li Zhan said: "That's because the land in Huangzhuang is fertile, if you go to an arid place, one thousand to two thousand catties per mu, I think it should be the limit." ”

"How many seeds can be produced from these 180,000 catties of sweet potatoes?" Eldest Sun Wuji immediately asked.

"I've done experiments...!" Li Zhan said: "A hundred catties of sweet potatoes can be planted in one acre!" ”

"I see...!" The eldest grandson Wuji said with a smile: "180,000 catties, you can plant 1,800 mu, and at that time, you can harvest 524000 catties... Then it can be promoted to Hubei in the summer... In that way, Hubei will at least have an autumn harvest and can survive the severe cold. ”

After speaking, the eldest grandson Wuji looked at Li Zhan and said excitedly: "Zhan'er... Do you know that your sweet potato can save hundreds of thousands or even millions of lives? ”

"Wrong...!" Just when the eldest grandson Wuji was excited, Niu Jinda on the side got up and said: "If sweet potatoes are really like this, then Brother Zhan is not just saving Hubei, he can let the people of my Tang Dynasty eat enough."

So Brother Zhan has saved the lives of thousands of people in my Datang, Brother Zhan, my old cow has led the people of the whole world to kowtow to you. After speaking, Niu Jinda bowed his head at that time, and Li Zhan couldn't stop him if he wanted to.

However, just when he wanted to go over and pull Niu Jinda up, suddenly Niu Jinda on the side cried, crying and complaining: "But why didn't you show up with sweet potatoes earlier, if that's the case, my father, my mother, and my family won't have to die."

Brother Zhan... Why didn't you show up with sweet potatoes earlier, do you know how much I miss my father and my mother...? ”

Suddenly, Li Zhan's eyes also turned red, because Li Zhan knew that the famine was terrible.