Return to Panyu, inside the Science Pavilion.
Zhu Xuan asked those who were engaged in chemistry to find a large amount of saltpeter.
This method of preservation is naturally to use ice. It is summer, where does the ice come from?
Ice can be made from saltpeter.
This method was once popular in the Song Dynasty. As for why no one uses it now, Zhu Xuan doesn't know the reason and is too lazy to investigate the reason, but he plans to use it in the Ming Dynasty.
Saltpeter is also easy to obtain.
At that time, just let the people from the chemical factory make a batch and give it to the farmers who want to keep it fresh.
"Your Highness, do you want to make ice?"
Xu Qi had some knowledge. When he saw the saltpeter, he understood what Zhu Xuan wanted to do.
Zhu Xuan said: "Ice can better preserve freshness. Let farmers make a large double-layered wooden box, put ice cubes in the outer layer and fruits in the inner layer. As long as the sealing can be ensured, the ice can last for a long time. It won’t melt away right away, so it’s very convenient if you need to replenish it on the road.”
Saltpeter can be reused. When the ice melts, the saltpeter will precipitate again, and when put into water, it can turn into ice.
After hearing this, Xu Qi felt that this idea should be useful.
Zhu Xuan asked Hou Xian to bring two basins of water, put the small basin into the big basin, and then put the saltpeter into the small basin.
When the saltpeter met water, it reacted quickly, absorbing heat, and soon a basin of ice appeared, giving off a light cold air.
"Your Highness's method should be promoted and allowed to be tried by farmers."
Xu Qi thought for a while and said: "It's just those saltpeters..."
Zhu Xuan said: "When the time comes, I will ask the chemical factory to release a batch and give it to the people in need. However, this kind of ice can only be used to keep it fresh. If it is eaten, it is actually OK, but I don't recommend it."
The saltpeter in their chemical plant is extracted from the soil in stables, toilets and other places.
As long as you are not afraid of strong flavors, eating ice is not out of the question.
As for the fruits and vegetables used to keep them fresh, they need to be washed before eating, so the problem is not big.
"If this is feasible, Your Highness has done us a great favor!" Xu Qi said solemnly.
"I have another idea that can change your agricultural structure."
Zhu Xuan's words were hard for Xu Qi to understand.
What is agricultural structure?
Xu Qi was confused.
Zhu Xuan did not intend to explain the nouns. If he continued, Xu Qi would understand, and said: "Just now in Foshan Town, I saw the local ponds, silkworms, fruits and vegetables and other planting methods. They are too simple. The ones over there The water system should be better, there won’t be much interference from the intrusion of sea water, right?”
Xu Qi shook his head and said, "It's not too big."
Zhu Xuan said: "In this case, we should make good use of the local conditions. If used properly, we can prevent floods, and at the same time raise fish, we can better grow crops and develop in an all-round way."
Xu Qi was deeply interested in that agricultural structure and said, "Please give me your advice."
“It’s actually very simple, just dig ponds to raise fish in low-lying areas prone to flooding.”
"The excavated pond mud is much richer in fertility than ordinary soil. It can be piled around the pond and used as a dike base on which to plant fruits, vegetables, mulberry trees, flowers, etc."
"In this way, we can not only prevent floods, but also raise fish, grow mulberries, etc., and increase the income of farmers."
"The crops on the embankment foundation produce materials, such as silkworm necrosis and silkworm pupae, which can be used to feed fish."
"In the pond, the mud that is cleaned regularly can be used as fertilizer and accumulated on the embankment to fertilize crops."
"In this way, we can accomplish multiple things with one stone and achieve cyclic development."
Zhu Xuan expressed his thoughts and added: "I call this Jitang Agriculture."
Jitang agriculture is an agricultural production method unique to the Pearl River Delta.
In this era, it has not yet appeared.
When Zhu Xuan was in Foshan Town, he could not see any farmland. They simply dug some ponds and planted mulberry trees, fruits and vegetables.
Xu Qi has no idea about Jitang agriculture.
After listening to Zhu Xuan's words, he thought carefully for a while. He couldn't give an evaluation and just asked: "Is this really feasible?"
Zhu Xuan affirmed: "It must be feasible. If Mr. Xu believes me, you can let people try to do this first. Soon it will be the rainy season in summer, and the role of flood control will be reflected in a while. As for the economic benefits, , it requires farmers to work hard to produce, so that it can be reflected.”
Xu Qi thought for a while and said: "I will pass down the decree later and let the people of Foshan Town give it a try."
Zhu Xuan put aside agricultural matters for the time being.
If we want to truly develop agriculture, we have to wait until Zheng He comes back and makes a lot of money from going overseas. He has enough money to build water conservancy projects.
Water is still the most important thing.
The preparations for Panyu are almost complete.
Zhu Xuan thought about the current affairs and waited until Wu Yongfeng came back to go to sea smoothly.
——
Xuzhou Prefecture.
Jiang Wei received Zhu Yuanzhang's order and asked Xuanyue Ze to lead the way. He rode very fast along the way, changing horses constantly at various stations. He had to drive in the dark even at night, and finally arrived at the location of the White Lotus Sect's stronghold.
After arriving at his destination, Jiang Wei took Zhu Yuanzhang's token, went to Xu Nanwei and Jianwu Station to mobilize troops, and then rushed to the local Jiusi Mountain.
"Are you sure the person is on the mountain?"
Jiang Wei asked coldly.
If the news is false, even if there is any kind of poisonous insect, Jiang Yu will announce that Yueze has been taken down. He will first use Jin Yiwei's torture instrument to greet him, and then send him to the heaven for punishment.
"I can confirm that the person is on the mountain."
Xuanyueze gritted his teeth and seemed to hate the White Lotus Sect deeply. He said viciously: "If I am not on the mountain, you can do whatever you want with me."
Jiang Wei opened his squinted eyes and shouted murderously: "Surround this place, let's go up the mountain."
The soldiers from the two guard posts, a total of more than 5,000 people, took action directly and approached the mountain. In the end, they really discovered it.
The White Lotus Sect is in the mountains and is well hidden.
However, when they saw officers and soldiers coming up the mountain, they broke into chaos on the spot and were discovered by Jin Yiwei's spies, who then killed them. Jin Yiwei and the others were not merciful at all and killed people on sight.
Jiang Wei also ordered the soldiers at the guard station to keep a few alive and take them back for interrogation when the time comes.
This stronghold of the White Lotus Sect was quickly taken over by them.
"Guan Gu, wait until I come back to take revenge."
At this time, an angry roar came from the mountain.
They followed the sound and saw a man in a red robe. He killed more than a dozen guardsmen and then rushed down the mountain. He was very fast and seemed to be strong.
Jiang Wei shouted: "Hurry and chase this person."
He probably judged that this person should be the protector Xuan Yueze mentioned.
All the Jin Yiwei gave up the White Lotus Sect minions and chased after the protector. The soldiers from the guard station continued to encircle and suppress them on the mountain.
at the same time.
Ding Gugang was at the bottom of the mountain, and Tang Sai'er was still following him.
"It's worth sacrificing a stronghold to gain Emperor Zhu's trust."
Ding Gugang said with a smile: "I hope we can break into Emperor Zhu's interior again this time. We can do whatever we want."
