Just as Li Ke was thinking, Su Xun suddenly interrupted his thoughts.
"Your Highness, may I ask why you collected so much urine?"
Li Ke glanced at Su Xun and just replied lightly, of course he was making fertilizer.
"Make fertilizer?" Su Xun's face became even more surprised, and then he hurriedly tried to dissuade her, "Your Highness, you must not do it. You may not know that this urine cannot nourish crops, but will burn the seedlings after application. It cannot be done at all. It’s fertilizer!”
However, just as Su Xun finished speaking, he saw Li Ke smile slightly, and then said firmly: "Haha, Mr. Su, please don't worry, Gu said that this urine can be used as fertilizer, then it can be used as fertilizer, Gu knows it well. "
After saying that, Li Ke turned around and walked in the direction he came from.
In fact, Su Xun is right. Urine cannot be used directly as fertilizer because the alkaline substances in urine will burn the seedlings.
But direct application is not possible, it can be done after fermentation. Even the nutritional content of fermented urine is no less than that of chemical fertilizers produced in early generations. After all, the main component of urine, besides water, is urea.
Moreover, the steps for fermenting urine fertilizer are also very simple. You only need to add yeast to the urine container, and then add some rice bran and soybean meal as carbon sources to seal the fermentation. During this period, you only need to open and stir once to make the internal fermentation even, and then seal it again, about It only takes two or three days for the urine fertilizer to ferment.
But there is no yeast in the current era, so Li Ke decided to use distiller's yeast instead. As for adding rice bran and soybean meal, it will obviously increase the cost, so Li Ke decided to use dead leaves instead. Although the fermentation speed will be slower, the final effect is the same.
After explaining this, Li Ke returned directly to the palace, but Li Ke was not idle. Instead, he wrote out in detail how to scientifically fertilize fertilizer on a piece of paper, preparing to hand it to Su Xun, and then Let him find someone he trusts to handle it personally.
When he was at the manure dump, Li Ke had already discovered the problem with the current retting technology. The current retting technology is simply to pile the manure together and let it ferment naturally.
Such retting is not only extremely inefficient, but most importantly, it causes the loss and waste of a large amount of organic matter. The final result is that the fertilizer that has been worked so hard does not have much fertility.
The retting method that Li Ke thought of is not only several times faster than the traditional retting method, but the fertility may be more than ten times higher than that of the traditional method.
According to Li Ke's idea, before retting begins, the manure and humus must first be mixed to make it easier to ferment. Then spread it evenly on the ground as a layer, then spray it evenly with river water diluted with distiller's yeast, and then lay another layer after completion.
Repeat this process for more than a dozen layers, and then cover the dung pile with leaves and weeds to speed up fermentation.
According to the retting technology of the Wei Dynasty at this time, if a pile of manure wanted to be completely fermented into finished fertilizer, it would take at least two or three months.
According to Li Ke's method, it is estimated that fermentation can be completed in about a week.
Only half an hour later, this new method of retting was delivered to Su Xun.
Although Lao Zhizhou had doubts about Li Ke's complicated fertilization method, he quickly arranged for people to implement it.
That afternoon, the dung dumps in all directions of Kunyang City began to get busy. Oxen carts and donkey carts, large and small, carrying more or less dung, headed towards the threshing floor in the east of the city.
In the threshing floor, some civilians had been waiting there early. As soon as the large and small dung trucks arrived, these people began to work under the command of one person and according to the method written by Li Ke.
At the same time, on the other side, in Kunyang City.
The notices Li Ke asked Su Xun to post have also been posted all over the streets and alleys of Kunyang City.
As soon as the government office posted the notice, the people in the city immediately gathered around it out of curiosity.
After the literate person in the crowd read out the contents of the notice word for word, the crowd of onlookers immediately burst into surprised exclamations.
"Urine for food? Is this really true? This is simply a huge anecdote!"
"Yes, this kind of thing has never happened before. Why do I feel that it is fake? How can urine be exchanged for food?"
"Hey, this is still fake. Didn't you see that this is a notice posted by the state government? If you don't believe it, go back to the government office to sign up and see if anyone will come to collect urine tomorrow?"
At this moment, there were constant discussions in the streets and alleys of Kunyang City.
Almost everyone was discussing crazily whether the urine-for-food thing was true or not.
And even more are people who are eager to give it a try.
After all, many people in the city are already on the verge of running out of food at home. Since there is such a good thing now, why not seize the opportunity?
Soon, the Kunyang government office was packed with people who came to register. The queue behind them stretched several streets and alleys, and the registration work continued until midnight.
It was night, in a courtyard of Minyuefang in Kunyang City, Zhang Wulang was carefully polishing a gleaming wild goose feather knife.
He is a garrison officer in Kunyang City. He is in charge of a group and has a strong and powerful figure.
The day before yesterday, he heard from his sworn brothers who were close to the commander of the capital and said that a small group of Khitan cavalry had been discovered in the north of Kunyang City in the past few days.
According to past experience, this small group of cavalry should be scouts sent by the Khitans to investigate the enemy's situation.
The appearance of these people often indicates that large Khitan troops will soon appear.
It seems that fighting will resume soon.
Just as Zhang Wulang was thinking about it, his wife on the bed next to him also turned his head, with a somewhat excited and uneasy expression on his face and asked: "Master, do you think the notice posted by the government office today is true or false? No. Will it be the officials who want to make fun of us again?"
Zhang Wulang just sneered when he heard this, shook his head and said: "Do you think it is possible? From ancient times to the present, have you heard of which dynasty can use urine in exchange for food? You'd better weave more when you have time, and do less unnecessary things. A realistic dream.”
The wife snorted coldly when she heard this, rolled her eyes at Zhang Wulang, curled her lips and said: "Tsk, I heard that this notice was posted by the prince in the city. How can a prince of his age still do it?" Can you lie to us?"
Hearing this, Zhang Wulang couldn't help but sneered again.
"Prince? Do you know that the prince was a prince in the past, and was deposed by the current emperor because of his stupidity? Do you dare to believe the words of such a person?"
After a pause, Zhang Wulang said again: "Okay, go to bed quickly. There may be another war recently, so you have to be careful in everything. As for exchanging urine for food, it will be strange if there are government servants coming to collect urine tomorrow morning."
Hearing this, Zhang Wulang's wife couldn't help but feel a flash of disappointment on her face, and then turned her head away lonely.
The next day, early morning.
A rapid knock on the door woke Zhang Wulang who was still sleeping.
As he was getting dressed, he shouted at the door: "Who is it?"
Then he heard a sharp voice coming from outside the door: "The government office is here to collect urine!"
