With adequate fertilization, preferred seeds, and good field management, the field yield can be doubled in the case of good weather.

Double.

Li Chao said it very easily, but Li Shimin and the prime ministers shut up one by one and kept silent.

Li Chao has actually said this before, but who believes it?

Anyway, Li Shimin never really believed it. Do you double the output? What a joke? If you collect more than three or five dou, you will get to the sky. Later, it seems that the Li family's output is indeed a lot, but it still only thinks it is an exception.

But this year, Li Shimin ran to Bashang a lot. The three thousand acres of rice terraces in the bathing ditch were not fake. The long rice ears were heavy.

Today he caught fish in the rice fields himself, and he was more clear about the growth of rice. After estimating it in his mind, he also matched what Li Chao said.

Excluding the terraces of the Li family, they are actually strange facts of irrigation of water.

Not to mention other lands produce five stones, but even if it doubles, it would be terrifying. Ordinary dry land has sufficient fertility, good seeds, and fine farming, the original yield per mu becomes two stones?

The most important thing is that after sufficient fertility, the fields do not need to fallow and rotate because of insufficient field strength. Even after planting grain for a season a year, you can still plant sorghum, soybeans, rapeseeds, radishes, etc. Isn’t this also a harvest?

Guanzhong now has a grain shortage of millions of stones a year. If the land output increases, wouldn’t it mean that Chang’an will not need to count on Guandong’s transfer of grain into the customs in the future? Don’t you always look at the eyes of those grain merchants?

If this problem can be solved, it is not just a food problem, it is an important matter related to the strategic safety of Chang'an.

"Your Majesty, I heard that there is Chameng Kingdom south of Lingnan, further south of Vietnam. Among the country, there is a kind of rice seeds with long ears but no razor, small grains, and they grow indiscriminately. Especially, it is drought-resistant and has a short growth cycle. It only takes more than fifty days from planting to harvest, and the yield is still high."

Li Chao revealed something even more magical to Li Shimin.

"Chancheng Kingdom? Could it be that Linyi Kingdom, which was once captured during the Sui Dynasty?" Li Shimin asked.

During the Sui Dynasty, Sui generals led their troops to conquer Linyi Kingdom, killed the king, looted their royal city, seized countless golden ivory treasures, etc. However, because the soldiers were not convinced by the local heat and the local conditions, most of them died, and finally withdrew.

Li Chao nodded, "Chancheng Kingdom was built by Zhan, and the land of Chameng was Xianglin County, which was placed in Rinan County during the Han Dynasty. Later, Qudasha County Magistrate, the son of Gongcao in Xianglin County, called himself the king, and first built Chameng Kingdom. During the Sui Dynasty, the Sui generals had once captured the capital of Chameng."

"There are such magical rice seeds in this Chameng Kingdom?"

Li Shimin also knows a little bit about rice.

During the Sui and Tang Dynasties, the planting area of ​​rice was already very large. It was not only widely planted in the south, but also in Henan, Guanzhong, and even Shuofang. For example, there were many rice in Weinan in Chang'an, and now there are thousands of acres of rice on Bashang.

No, according to his understanding, rice usually needs a production period of about 100 days and a production period of about 50 days?

This is cut in half.

"Your Majesty, the weather in the north is cold, and you can only plant rice for one season. However, in the south, the Yangtze River and Huaihe River basins, and even the Lingnan region further south, the weather is warm. For rice seeds like Chamcheng rice that only takes more than 50 days to produce, you can plant two plants, and harvest the second season before the cold winter comes. Even in Lingnan, you can plant three seasons!"

"Two seasons of rice, three seasons of rice?"

Even the two prime ministers born in the south, Chen Shuda and Xiao Yu, were surprised.

Since the Sui Dynasty, the amount of rice planting has increased. There are also a few excellent straw plants in two seasons, but the type belongs to very few. The key is the lack of good rice seeds.

The growth cycle of a season is more than 100 days, which is three and a half months. It takes three months to plant it. After three and a half months, it is almost the end of June or even July.

Planting the second season before the beginning of autumn, but it will be too late for more than three months. The cold wind and frost will prevent the rice from heading and will be frozen to death.

Maybe you can plant it in Lingnan for two seasons, but you will definitely not plant it in the Yangtze River and Huaihe River Basin.

Today, Lingnan is a wild and undeveloped land, and it is not bad to develop the Huaihe River Basin and the lower reaches of the Yangtze River. Even the middle and upper reaches of the Yangtze River are not good. There are still many barbarians in Dabie Mountains, Xiangchu, and there are still many barbarians.

Therefore, it can be said that when Li Chaoyi said that there was a new rice seed, the production cycle was only about fifty days, but the yield was higher than the current rice seeds. It was drought-tolerant and unscrupulous, Li Shimin and the others were surprised, and after the surprise, they all looked suspicious.

Can a small country like Champaign, which is a wild land, have such good things?

"I have never heard of such rice seeds before?"

In fact, Chameng rice is not entirely the rice seeds of Chameng, but should be said to be Chameng on the Indochina Peninsula. The real wax is rich in rice, and their rice seeds are naturally cultivated.

Because of the good natural conditions, climate temperature and rainwater lighting, it is very simple for people to grow rice there. There is no need for any water conservancy irrigation facilities, no preferred seeds, and no troublesome transplantation of seedlings.

They are all extensively cultivated, and the arable land is not deep, and they do not cultivate seedlings. They directly plant the fields, and they do not move the seedlings. After planting, they do not seek water when drought or waterlogging, and they do not let go of manure and do not cultivate them.

But that's true, because rice seeds are drought-resistant and flood-resistant, and with good local climate conditions, their rice yield is still very good.

"It's a waste of resources!"

Li Shimin and the others heard Li Chao telling stories, and after they told the way Chameng rice was grown, Li Shimin was so angry that they slapped his thigh.

"It's simply unreasonable. If they plant blindly, they will have a good harvest!"

"Your Majesty, this is good for rice seedlings. If we have these rice seeds, we will optimize rice seedlings, then seedlings, transplant them, take good care of them, water and fertilizer, weeding, etc., the yield will be higher."

Li Shimin stared at Li Chao and asked, "If you plant Chameng rice here, can you plant it for two seasons? How many stone harvests can you get in one season?"

"Your Majesty, the climate here is not as good as in the Jianghuai region. It's okay to plant rice for one season, but it's not a big deal. However, if there is Chameng rice, it can be planted for two seasons, but the water is not good. Without water, it's not good to just dig wells to pump water. The cost is too high and it's not good. If you only plant one season, the yield will not increase too much. According to our current method of intensive cultivation, we can maintain fertilizer and water, and one mu of them can probably reach the Six-Stone Wet Valley."

The roughness rate of rice can generally reach more than 70%. It is necessary to remove the shag, broken leaves, rotten seeds, etc., and finally convert the rice into brown rice. One stone can produce more than 7 dou of water. After drying the moisture in the wet valley, it will also be reduced a lot.

The moisture content of fresh millet is generally about 20 to 40%, and after drying, there will be more than 10%. If a stone of millet is dried, it will usually be about 8 and a half dollars.

A stone of dry valley can produce about seven dou two or three brown rice.

By doing this, one stone can eventually produce about six dou and two pieces of brown rice. If you plant this Chameng rice, one mu of six dou and more than three dou and seven dou can produce brown rice.

There are many more wet valleys than many of the original lands that produce one acre of land.

"Your Majesty, if this Chameng rice can be introduced, the most important thing is to be promoted in the Huaihe River Basin and the middle and lower reaches of the Yangtze River. There are already a lot of rice fields there. If the Chameng rice can be changed and the double-season rice can be promoted in places with sufficient water, then the grain output may be greatly increased. By then, the Jianghuai River Basin will be the granary of the Tang Dynasty."

Unfortunately, there are no corn, potatoes, and sweet potatoes at this time, otherwise the food will increase significantly.

"Do you have Chameng rice in your hand?" Li Shimin looked at Li Chao with an excited look.

Li Chao spread his hands.

"I don't have Chameng rice in my hands."

"Then do you know so clearly about Chamengdao?"

"I heard from a businessman from Lingnan that he had been to Chameng for business."

"Where is this businessman?" Li Shimin's eyes were staring at the boss, just like he wanted to eat people.

Of course, that businessman did not exist, it was just a pretext for Li Chao. But there were indeed rice in Chameng. Li Chao actually arranged people to go to Chameng last year to find this kind of rice seed.

But the journey is long and it is not easy to travel around, so I guess I can't come back for a while.

Gao Shilian stood up at this time, "Your Majesty, I can guarantee that what Li Pingzhang said is a fact."

Li Shimin turned his head and slapped his head, "How come I forgot that my uncle was once demoted to Vietnam by the Emperor of Sui. He has served as an official there, uncle, does Nanyue really have such rice? Is it so magical?"

Gao Shilian confirmed that there is indeed such rice in Nanyue, but it is very ordinary. He didn't pay much attention to it before, but today he heard Li Chao say this and felt that ordinary rice is indeed not ordinary everywhere. Such random farming can grow well, and it is indeed possible to harvest it in less than two months.

But he was not sure whether this rice could survive in the Central Plains, whether it also had such a yield, especially whether it could be planted in two seasons.

"Since there is really such rice, I don't care about the rest, and I'll talk about it later."

Li Shimin is also the kind of person who can't stand the good things to spend the night in other people's houses.

Two seasons.

The terraced rice in Li Chao's family has high yields and has to rely on fertilizer and meticulous cultivation. With this Chameng rice, the yield is doubled in the south at once.

If we also carry out intensive cultivation of fertilizer and water conservation in the south, wouldn’t that mean that the grain output in the south can be doubled directly?

I harvest three or four stones in one season, but won’t I harvest seven or eight stones in two seasons?

If there are those good paddy fields that are cultivated carefully, you can harvest five or six stones in one season, wouldn’t you have to collect eleven or two stones in two seasons?

It's exciting to think about it.

I don’t feel panic when I have food in my hands.

Even the emperor still has to worry about food all day long.

"Send someone immediately, immediately, I will see Chameng rice in the shortest time."
Chapter completed!