?In the afternoon, in the Imperial Garden outside Chang'an, Yuwen Wen and his family were on a "summer tour", setting up a pergola on the grass beside the stream to prepare for a "picnic". The prince Yuwen Weicheng is now taking his younger brother and sister to play by the stream.

Yuwen Weicheng, dressed in casual clothes, rolled up his trousers and was busy in the stream with his younger brothers who were dressed in the same dress. Their location was on the edge of a small pool in the stream.

Everyone picked up stones and built a "overflow dam" in the stream, causing the upstream stream to gradually gather, the area of ​​the small pool became larger, and people watching on the shore could see fish swimming in the pool.

On the side, Yuwen Wen put the branches, leaves, rhizomes and stems of a certain plant into a stone mortar to break it out, causing its juice to flow out. Because of the large number, Yuwen Wen was so busy that sweat beads oozing out of his forehead.

After a while, I asked my sons to come over and pour the broken branches, leaves, rhizomes, and water from washing stone mortars into the pool.

A moment later, a fish flipped over its belly and floated to the water. Not long after, more fish flipped over its belly and floated onto the water, their bodies trembling slightly, as if they were struggling, but they were "ripped around" like drunk.

"The fish is drunk, the fish is drunk!!"

The little guys cheered, watching the fish "drunk" by the drunk fish grass turn over their belly, float on the water, and float along the water to the "overflow dam" built by the stones. The boys then ran to the small dam to catch these "drunk" fish.

Yuwen Weimin rushed the fastest and chose the largest fish, but because it was difficult to catch it, he worked hard for a long time and couldn't catch it steadily, so he let the fish slide into the water several times.

Seeing that everyone else had gained something, I grabbed the fish and walked back. In desperation, I simply held the whole fish in my arms and ran to the shore excitedly.

The little girls were excited to watch their brothers catch fish, and they were all excited. Yuwen Wen was also very happy to see the cheering and cheering of his children. He was very satisfied with the poisonous fish vine in his hand.

The juice contained in poisonous fish vines can poison the fish and cannot move, but the word "poison" is too harsh, so it is also called "drunk fish grass".

Poisonous fish vines can poison fish, but people eat fish that are poisoned by poisonous fish vines but are fine, so poisonous fish vines are very practical. When people face survival challenges in the wild, if they do not have tools, they can also rely on poisonous fish vines to catch fish.

The poisonous vines grow in the south, and there is no such thing as Chang'an. Yuwen Wen specially ordered people to plant them in the imperial garden. One of the purposes is to allow the sons to spend an interesting childhood and experience a different life.

The fish was caught and the next thing was to be roasted. The grilled fish was for lunch, which had to be done by the princes themselves, but the scene of killing the fish was a bit bloody, so the princes turned to the bamboo forest to see the pandas.

This male panda was almost "repatriated to his original home" last year and finally "settled" in Chang'an. The bamboo forest where he lives is extremely comfortable except for having no spouse.

The panda has a name, which was chosen by the princes "voting" and is called "Mo Bai".

Because "Mo Bai" looks stupid and cute, it is actually very fierce, so everyone can only watch outside the fence and are not allowed to enter the bamboo forest to contact, so the little princesses threw fruit into the fence and fed the pandas.

"Mo Bai" ate the fruit comfortably, and the white dog "Xiao Xiaobai" who was with the little princesses kept calling at the black and white thing.

The little white dog "Xiaobai" who accompanied Yuchi Mingyue back then has died, and "Xiaoxiaobai" is his descendant, and continues to accompany Yuchi Mingyue, as well as all the little princes and princesses.

Yuwen Wen looked at "Xiao Xiaobai" and then at the "plugin of hair" in the tree next to him. Suddenly, an idea came up:

It is said that parrots live long, so can this bird live longer than me?

After putting away his thoughts, Yuwen Wen was very satisfied when he saw the happy scene of his wife and children. He turned to the other side of the manor and came to a large area of ​​farmland.

He looked green and had a very "sunny" look, which contrasted with the gloomy weather.

In Guanzhong area, traditional grain crops are millet, wheat and rice, and rice are relatively rare. In this manor, not only millet, wheat, but also rice is planted.

Mixed with millet, wheat and rice, this "mixed" style makes this area look a bit strange.

But since this is a test field, everything is taken for granted.

Yuwen Wen took his family out for a trip today, and actually wanted to see how the struvite fertilization experiment progressed.

The struvite collected from small islands such as "Dadongsha" in Nanyang at the beginning of the year has been sent to Fanyu, Longbian, Yangzhou, Xiangping, Rangcheng, Yecheng, Luoyang and Chang'an for experiments to see how the yield-increasing effect of farmlands with different ratios of struvite was applied.

The experimental fields in Chang'an are here. It is summer now and not far from autumn, so Yuwen Wen is very concerned about the experimental situation. Now he is very happy to see the crops growing well in the farmland with struvite applied.

Of course, you can't tell the reputation just by looking at the growth of the crops, because in ordinary farmlands, millet, wheat and rice also grow well.

Even though it was too early, Yuwen Wen was still confident in the experimental results, because the conclusion that "struzite is a natural and efficient fertilizer" has been tested by facts.

Strulotite is a stone-like substance formed by seabirds' stool weathered. It has a high phosphorus content. In the era without the fertilizer industry, it is a natural and efficient fertilizer. If it can be mined in large quantities, it will be very helpful for increasing grain output and will have an immediate effect.

With Yuwen Wen's foreign geographical knowledge that he had forgotten almost the same, he only knew that the islands of Peru, a South American country, and the South Pacific island country Nauru is a famous struvite production area.

However, this era is still far from "discovering" America, and I don't know where Nauru is in the South Pacific, so Yuwen Wen didn't even care about struvite.

However, among the islands of the Nanyang Ocean, a large number of seabirds gathered on some islands, so that the bird droppings accumulated over thousands of years have become weathered into stones.

Fishermen are used to this, so they don’t take it seriously. Therefore, in the Nanyang style summarized by the Maritime Bureau, the descriptions of small islands such as "Dadongsha" are mostly described in terms of the words "no one lives on the island and seabirds gather."

It is not specifically said that "there are sea birds hanging on the island", just like the official document will not say that the ground is flowing with shit and urine in the civilian gathering area of ​​Chang'an City.

Of course, in Chang'an City now, there will be no road shit and urine flowing. Yuwen Wen said "birds do not shit" during a conversation last fall. Then he remembered that seabirds could not just shit on the island of Nauru, and then he remembered to inquire whether there are struvites in the Nanyang islands.

Therefore, islands such as "Dadongsha" have important economic value, and the struvite mined will be used as "soil fertilizer" for agricultural fertilization.

However, the struvite on the island cannot be used on so many farmlands in Zhou. If it is transported to Chang'an or the mainland, the costs incurred are enough to offset the profits brought about by increasing production.

Therefore, in practical application, "soil fertilizer" such as struvite is more cost-effective to increase agricultural income in coastal areas.

Yuwen Wen was watching by the field. There were technicians spraying pesticides in the field to prevent and control pests and diseases. Of course, in order to ensure the experimental results, pesticides must be sprayed in farmlands where struvite is applied.

Of course, this pesticide is not a chemical product, but a "soil pesticide": it is mostly a diluent of castor leaf juice or a rhizome leaf juice of poisonous vines.

With the rapid development of the printing industry, metal movable type printing technology relies heavily on ink, and inks mostly use castor oil as the main ingredient, so the planting area of ​​castor in various places is large. Therefore, the "soil pesticides" prepared with castor leaves as raw materials have become a powerful tool for increasing agricultural output and income.

Similarly, poisonous fish vines from the south were used by people to remove insects among the people, and the effect was still good. Therefore, under the strong promotion of the court, castor and poisonous fish vines became large-scale economic crops.

A bumper grain harvest, a full granary, and you have food in your hands, and you are not panicked. You must try every means to increase production and income so that the country can be stable.

Therefore, "soil fertilizer" struvite, "soil pesticide" castor, and poisonous fish vines are treasures that Yu Wen Wen has tried his best to find.
Chapter completed!