The fall of the Ming Dynasty and the prosperity of the Qing Dynasty are one of their other special truths.

To put it bluntly, it is not that the emperor is so capable, but that corn, sweet potatoes and peanuts, as well as potatoes and other high-yield grains are popularized and applied on a large scale. This is the "politics of food"!

That is, the face of the Ming Dynasty was too dark, and it happened to bump into the natural disaster environment during the Xiaoice River period.

Then, Emperor Chongzhen's eyesight was not good, and he did not know the role of these high-yield grains. Lack of a clear stroke!

In addition, the civil officials are all cheating goods, so it's a cup!

However, these are not too difficult things for Zhu Zilong.

After all, he is a time-traveler standing on the shoulders of historical giants, and it may take some time to get rid of the garbage among the royal breeding pigs and civil officials.

However, the top priority is to find these high-yield crops that were introduced to the Ming Dynasty, or soon to be introduced to the Ming Dynasty, and promote them on a large scale.

(In fact, if in the current environment of the Ming Dynasty, you can't find all the high-yield food crops, it's a big deal that Zhu Zilong goes back to the modern 21st century and brings some seeds.) I just don't know if the effect of these seeds can survive after crossing, and whether it can have a significant effect? ）

It's worth testing, testing and observing!

The next day, early in the morning.

Zhu Zilong went to Wang Dayong, the housekeeper who was inspecting the tuntian in Zhuangzili, and gave him a brush drawing of corn, sweet potatoes, peanuts, and potatoes that he had drawn, and asked him if he had seen these grain crops.

As a result, Wang Dayong said that he had never seen any of them, so Zhu Zilong had to let him pass on this kind of picture and show it to everyone to see if anyone had seen it.

After most of the day, there was a homeless person who was said to be from Hainan, and said that he seemed to have seen one of the pictures.

Give Zhu Zilong a finger, it turned out to be a sweet potato.

Sure enough, this thing was the first thing to be introduced into China by foreign countries, so it was the Hainan people who saw it first, which may be related to the vicinity of Taiwan and Guangdong, because pirates and foreign ships from time to time to visit each other, right?

In normal history, Xu Guangqi, a first-class scientist in modern and ancient China in the late Ming Dynasty. Because his father was living at home in Shanghai, he learned that the sweet potatoes planted in Fujian and other places were good crops for famine relief, so he introduced them from Fujian to Shanghai, and then spread them to Jiangsu, and the harvest was quite good.

But before it received the attention of the Ming Dynasty, the Ming Dynasty hung up.

Then, Chen Zhenlong's fifth grandson, Chen Chuangui, introduced sweet potatoes to Zhejiang in the early years of Kangxi, and his son Chen Shiyuan took several juniors to Henan, Hebei, Shandong and other places to widely publicize and persuade sweet potatoes to be planted.

When the harvest is in the autumn, there are many potatoes, so they are spread to ten, ten to hundred, and compete to plant. Sweet potatoes were quickly popularized in North China, and this food crop, known as auspicious, was so cheap in the Qing Dynasty!

At this moment, Zhu Zilong, who was very interested, seriously asked this homeless person to recall the matter of sweet potatoes.

As a crop with high and stable yield, sweet potato has wide adaptability, strong resistance to stress, early resistance to paint, and less waiting for pests and diseases. In addition to being used as rations, feed, and starch production, even the leaves can be used as high-quality green fodder, and there is hardly any waste.

Compared to hybrid rice that can only be planted once and then fails, it is a more meaningful "crossing artifact"!

"Back to Lord Zhu, this sweet potato, everyone in Hainan calls it sweet potato. The gold tube is highly productive, but there are really not many people in general! The homeless man's answer made Zhu Zilong very puzzled.

"Why?" Zhu Zilong was eager to know the reason and asked tightly.

"One of them is not easy to store and preserve, and the second food is sour, and after one or two years of three consecutive plantings, the yield will drop sharply. So there aren't many people who plant! The outcast, after a moment's thought, replied.

This answer was much more than Zhu Zilong expected, he continued to ask questions without giving up, and he was sweating profusely when he asked the homeless man, and only then did he come up with a general answer after making up a lot of content in his brain.

It turned out that the south of the Ming Dynasty was still in Hainan.

The local climate is humid, and sweet potatoes are perishable and difficult to store. In addition, most of the fields over there are considered fertile fields, and people are not used to eating this thing, and they are more willing to grow rice.

If it weren't for the hassle of sweet potato planting, the planting would be done. After harvesting potatoes, people eat them, and feed them to pigs are all easy to use. Maybe there will be fewer people growing in Hainan!

Because people in Hainan and the south do not attach importance to it, and no one thinks of promoting it to the north, and there are no telephones and televisions in these days, it is not very easy for information to flow smoothly. As a result, it is clear that this good thing has been spread to Hainan and other places for several years, but it has not been developed on a large scale!

"Lord Zhu, this sweet potato harvest is quite large. It doesn't cost manpower or fertilizer, and at most you can collect thousands of catties per mu. But this thing can't stand it! Are you ready to promote it in Shandong? Seeing Zhu Zilong in a daze, the homeless person asked again.

Zhu Zilong, who was in a thousand thoughts, suddenly raised his head when he heard the words of this homeless person, and seemed to have some expressions of disbelief, and asked rhetorically: "What did you just say, sweet potatoes can only be harvested in one mu of your Hainan?" ”

It's no wonder that Zhu Zilong doesn't believe that this thing is in the modern era, even if it is thrown on the ground and planted, it can yield 3000-4000 catties per mu when harvested.

You told me that the yield per mu is about 1,000 catties, what the hell is this?

Who knows, this homeless person didn't seem to feel strange, nodded and replied: "Yes, my lord, planting this sweet potato in Hainan, you can harvest more than 2,000 catties in the first year, and then it will be less and less every year." It is possible to have only a few hundred catties when it is rare, so there are fewer and fewer people planting now! ”

Zhu Zilong was dumbfounded.

He inquired carefully about what he knew, and finally waved his hand to let the outcasts go back to their work.

At this time, he had already figured out the reason.

Without it, sweet potato virus infection also!

Because sweet potatoes are growing and reproducing asexually, they can be infected with a variety of viruses during growth and storage. Viruses will accumulate in the twilight patches or potato seedlings, causing severe degradation of the species. As a result, the quality deteriorated and the yield dropped significantly.

Even in the 21st century, there are no highly resistant sweet potato varieties or special agents to prevent and control viruses. Only by using detoxification technology can we prevent and control viral diseases and improve the yield and quality of red animals.

Because of the strong development of modern science and technology in the 21st century, farmers there do not need to carry out their own sweet potato seed production, all of which are handled by professional seed companies, so they can ensure a bumper harvest of sweet potatoes every year, and the yield is higher and higher year by year.

However, it was placed in the time and space of the Ming Dynasty.

This kind of detoxification treatment has to be carried out by a professional company, and Zhu Zilong obviously can't do it with his own strength.

Therefore, it can only be planted and promoted, those sweet potato descendants that already have some toxins. This output may not reach the level of the sky!

"Alas! Never mind. About 1,000 catties are about 1,000 catties, and some soil methods can be used to detoxify some of them, and they can barely reach the yield of about 2,000 catties per mu, right? Compared with the people in the north, the average yield per mu is only more than 200 catties of grain, and it is already a small rebellion to meet the continuous natural disasters in the late Ming Dynasty! ”

With a small sigh, Zhu Zilong still decided to promote the application of sweet potatoes to Shandong.