Nightingale looked at Al in surprise, then reluctantly turned her head away, her eyebrows twisted in disgust.

"Moonlight fish are good friends of our dark elves, how can we eat them. ”

"Because you dark elves never eat them, you don't notice the strangeness of these fish. Al said, bringing the fish in his hand to the nightingale's mouth.

"This is for your people, if I can't taste it, I still need you to try it?"

"Really?", Nightingale looked at Al with a suspicious expression, mainly because Al was really convicted and often teased her about such trivial matters.

"Really. Al assured, and then he added, "You can't swallow it, you have to eat it raw, especially the internal organs." ", he emphasized.

Seeing the nightingale's sad face, disgusted and vomiting before eating, Al was also a little unbearable. It's a pity that only nightingales can do this, who makes the five senses of the dark elves different from the sensitivity of ordinary people.

However, after all, the nightingale is not one of those eldest ladies in Shenghui City who will faint "delicately" if they are slightly frightened. The little girl of the dark elves has the determination and courage to sacrifice herself for the sake of her people, not to mention this small fish.

The nightingale stretched out her hand and took the fish in Al's hand, and as soon as she closed her eyes, she stuffed the fish into her mouth and chewed it carefully.

A thin line of blood flowed from the corner of her mouth and slowly dripped down her jaw, reflecting her slightly pale cheeks, and there was a cruel beauty in the red and white.

Suddenly, she spat out a blurry mass of flesh in her mouth and rushed to the river to vomit. Al gently patted her on the back: "It's okay, drink a little water, and after a while, there will be no taste in your mouth." ”

Nightingale shook her head, her face pale as paper, and retched for a while.

The Dark Elves worship nature, but they are not like the radical environmental groups on Earth, where they can't eat any animals. They believe that this is part of the natural cycle, but the Dark Elves, like humans, eat cooked food.

Nightingale, the little girl, must have never eaten raw meat, which is why she has such a big reaction.

The nightingale drank a few sips of water before leaning on her mouth and said, "The internal organs of the moonshine fish seem to have a slight bitter taste, but it is not obvious. I also tasted it for a long time. ”

Al clapped his hands excitedly, "That's right, this dark river does contain phosphorus." ”

Al had been thinking before that the last thing in this underground world was all kinds of ores. If the growth factor of fluorescent wheat is phosphorus, why do those phosphate rocks not grow fluorescent wheat but grow by the river?

The answer is that phosphorus and water are indispensable for the growth of fluorescent wheat. And after these dark rivers have just flowed through many mineral deposits, the water will inevitably contain trace amounts of phosphorus, but the content of this phosphorus element is too small, so even the dark elves can't taste abnormal.

When fluorescent wheat absorbs water, it also absorbs trace amounts of phosphorus in water. Just because all of this phosphorus is used to produce fruit, there is no margin to help them multiply.

Al even speculated that the moonfish in the river were capable of glowing, and that they had the biological properties of collecting phosphorus in the water and releasing it. Otherwise, there are many dark rivers in the underground world, why are there only a few places where fluorescent wheat can grow?

These areas are either home to creatures such as moonfish, or there are other special geographical or biological conditions that can help gather phosphorus in the water and ensure the growth of fluorescent wheat.

And it is precisely because the conditions for the reproduction of fluorescent wheat are so harsh that even the dark elves who have been dealing with plants for thousands of years have not been able to figure out the cultivation method of fluorescent wheat.

Because this involves not only botanical knowledge, but also a certain amount of chemical knowledge. And in this fantasy world where magic is prevalent, whether it is humans, elves, or other races, the understanding of this discipline is still very superficial.

Al instructed the nightingale, "Nightingale, have you ever seen such a variety of ores, one of which is grayish-black as a whole, but has a powdery white inside. ”

"Then there's a dark blue, a dark green, or a blue-black, and the color doesn't make much difference. ”

"Either way, they smell like the one you remember. ”

In fact, there is another kind of Al that does not say that pure phosphate rock is actually transparent, but this pure ore is extremely rare in nature, and most of the phosphate rock is sedimentary rock or oxidized.

Nightingale said with some embarrassment: "These ores and the like, or those dwarfs are the best, we dark elves are not good at distinguishing these stones, if it is necessary, I will ask the old man of the clan." ”

"Or bird droppings. Al said, "Is there any place in these 100,000 mountains where a lot of guano is piled up?"

There is a rumor on Earth that there is a small country in the Pacific Ocean, the third smallest country in the world, but it was once the richest country on earth, and its cash cow is extraordinary: guano.

The droppings of seabirds flying in the sky in the vicinity. After centuries of accumulation and solidification, chemical changes take place to form a special type of phosphate rock.

This story was told by the geography teacher in class, and Al used to use this story as a topic in the chat with the girls, enjoying the surprised eyes of the girls.

Therefore, he still remembers very well the knowledge that guano accumulation can form phosphate rock.

"Guano?" Nightingale became less and less sure what Al was thinking, but she still wanted to believe him. Hurriedly ran back to the clan and found two elders who were said to be the oldest in the clan.

It is said that he is the oldest, but he can't tell it from his appearance at all. These two elders are women, and the carving knives of the years have carved faint wrinkles on their faces, but they are very gentle and not carved too deep and too dense.

It was as if a carving hand was carving two jades with his heart, and the knife was so gentle and cautious that these wrinkles on their bodies were not only not proof of age, but as if they were a decoration.

And they gave Al the answer.

"There is no place where there is a lot of guano piled up. There are few birds in the 100,000 mountains, and even more windy, even if a little bird droppings are piled up, they will soon be blown away by the mountain wind. If you want to find such a place, you have to search for the large flocks of birds in these 100,000 mountains. And the large flock of birds that can survive in these 100,000 mountains is no better than those most ferocious magical beasts. ”

"As for the slightly smelly ore, we've seen some. "A few hills from here is a dead crater, and near that crater there is such ore." ”