At this moment, Yizhou is recuperating and recuperating, and it is a thriving scene, but Liu Chan has encountered a problem.

Last winter, he earned a large number of points and exchanged them with crop seeds that were not available in this era, in the hope of being able to provide Shu Han's grain production.

If he wants to increase grain production, Liu Chan naturally exchanged for high-yield crops, sweet potatoes and corn.

Because corn and sweet potatoes do not have high requirements for time, and high-quality seeds are suitable for cultivation nationwide.

Since ancient times, China has divided the north and south with the Qinling Mountains and the Huai River, and cultivated crops, generally rice in the south and wheat in the north.

However, the Three Kingdoms period is still relatively backward, and the south is mainly planted with rice, supplemented by mulberry, hemp, beans and other cultivation.

In ancient society, men cultivated and weaved, men were responsible for farming, and women were responsible for weaving, so every household planted mulberry and hemp.

Mulberry leaves can be used to raise silkworms and spin silk, make silk, and mulberry fruits can also be eaten. As for hemp, its seeds can be eaten, such as oil extraction, stir-frying, and its stem bark can also be used to make hemp rope and linen.

In the north, wheat and millet are mainly planted, but beans, mulberry, hemp and other crops are also planted.

There are many kinds of cereals, but no matter what is grown, there is a big drawback.

The yield is not high!

For example, rice, wheat and other major crops are planted on fertile land, and the yield per mu is only about 20 kilograms. (The Qin and Han dynasties are divided into large and small acres, the large mu is about 460 square meters, the small mu is about 190, and the small mu is only less than one-third of the one acre of land in later generations)

However, corn and sweet potatoes are different, and the improved high-quality corn seeds in later generations can yield 800 kilograms per mu according to the calculation of threshing and drying.

Converted into the area of small acres in the Han Dynasty, one mu of land is also 260 kilograms, which is more than ten times higher than that of rice and wheat.

The yield of sweet potatoes is even more remarkable, its yield per mu is at least more than 2,000 kilograms, if the land is fertile and the fertility is sufficient, its yield can even reach more than 10,000 catties.

In this era, there are not as many chemical fertilizers as in later generations, and although the yield cannot reach the mechanized planting in later generations, there is no doubt that its yield will definitely be more than 20 kilograms per mu of rice now.

And there are many ways to eat corn sweet potatoes.

For example, sweet potatoes can be boiled and eaten directly, roasted and eaten, or cut into pieces to cook porridge, or chopped and pulped to make starch (sweet potatoes are mashed, put in water to filter the residue, and the sediment after the water sinks to the bottom is dried to starch), and its starch can be used to make glutinous rice cakes.

Corn can also be boiled and eaten when it is tender, and it can be ground into flour to make corn tortillas when it is old.

And these two crops, corn stalks, sweet potato vines have a role, can be used as forage, feed horses, feed livestock are good things.

In addition, they do not have strict requirements for water sources like rice and wheat, if there is no water source for rice, it basically means that there is no harvest of grains, and if there is no snow in winter, the wheat will not be harvested in the next year.

Corn, sweet potato, basically do not need artificial water irrigation, wind and rain in the land, rely on rain to solve the problem of water source, corn weeding, sweet potato vine, at most auxiliary some plant ash, human and animal manure for fertilization, the yield will be good.

It's March, and in May, sweet potatoes and corn are being sown.

Time is short, Liu Chan does not exchange many seeds, Liu Bei's time to recuperate is only three or five years at most, sweet potatoes, corn want to be planted on a large scale in Shu Han, this kind of seed is far from enough, at least two years of planting, accumulation of seeds, can be large-scale planting.

Therefore, Liu Chan must take out this kind of seed when the sowing period arrives in May this year.

But how do you get the seeds out?

rashly took out the seeds and told Liu Bei that this was a high-yield crop, Liu Bei would definitely not believe it, and would also inquire about the root cause.

If Liu Chan planted a year in advance, the time was the autumn harvest season, Liu Chan took Liu Bei to see the finished crops, maybe Liu Bei would still believe it.

Take out the seeds directly, Liu Bei will definitely not believe it.

Although Liu Chan did not exchange many seeds, it was relative to the national planting, but it was more than enough to plant a county's fields, thousands of acres of land, and tens of thousands of acres of land.

Liu Chan estimated that Liu Bei would not take the risk of using so many fields to test seeds with unknown routes.

Even if Liu Bei looks at Liu Chan's face and plants a few acres of land casually, then the seeds exchanged by Liu Chan will be wasted, relying on the planted crops to continue to accumulate seeds, even if Liu Bei has seen the yield of corn and sweet potatoes in the autumn, and is vigorously promoting, then the promotion to large-scale planting will have to be postponed for two or three years.

Liu Chan thought about it over and over for a night.

It is definitely not possible to give it directly to Liu Bei.

If it's God's bestow, it's too mysterious.

Liu Chan pondered that it would be better to leave Chengdu and bring back the seeds from outside, so that it would be easier to find some excuses.

It's just a chance to go out, but no, how can Liu Bei easily let Liu Chan leave Chengdu.

Seeing that time passed little by little, Liu Chan finally couldn't bear it anymore and took the initiative to find Liu Bei.

"You're going to Nanzhong?" In the study, Liu Bei was surprised to learn of Liu Chan's intention.

Liu Chan arched his hand and said: "Father, in January, you have sent an envoy to contact King Zhurong and agreed to the marriage. Moreover, Shui Luoyi and King Zhurong have been separated for a few months, and she also misses King Zhurong a lot, so she should return to Nanzhong to visit. ”

Liu Bei waved his hand and said, "Wouldn't it be enough to let the envoy take Shui Luoyi to Nanzhong, why should you go in person!" ”

Liu Chan persuaded and said: "Father, if you send envoys, it is not enough to show sincerity, besides, Nanzhong is different from others, the population is also hundreds of thousands, each of them makes a living from hunting, quite fierce, although large-scale combat is not good, but in terms of individual soldier ability, it is stronger than my Yizhou soldiers."

We should be good friends with him, now King Zhurong is also old, although he has no objection, but the barbarian king under his command may not be able to say, King Zhurong has no heirs, only Shui Luoyi has a daughter.

After a hundred years of his wish to King Rong, where should Nanzhong go? Can the new barbarian king submit to his father like King Zhurong?

Therefore, the child wants to take this opportunity to go to Nanzhong, befriend other barbarian kings, and give kindness and prestige, so as to achieve long-term peace and stability in Nanzhong! ”

After listening to Liu Chan's words, Liu Bei was a little moved, nodded and said, "That's not bad, King Zhurong is also sixty now, right?" Although he is subordinate to me now, it may not be possible to change to another barbarian king in the future. ”

As soon as Liu Chan heard this, he added a fire again: "And Meng You, the younger brother of Meng Shu, has fled back to Nanzhong, he is quite good at making friends, and may have fled to other tribes. ”

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