Lou Cen Zhi muttered to himself: "Greenhouse effect, greenhouse effect, this word is fresh, but it is extremely appropriate. Guo family boy, you really impressed me, I opened my eyes to the sky, and naturally discerned that the light of the golden crow shone into the shed through the film of the tree, and it was indeed a lot of loss. However, the light of the golden crow gathered more and more, and it was impossible to escape in the shed. I heard that the Mother of the Golden Crow, Xi and the Holy Mother, can concentrate light into a needle, but I didn't expect that you, a mortal mortal in the flesh, can actually recognize the light and know that this light is a real thing. ”

Guo Daluxin said, as long as the photon has been in primary school compulsory education, who doesn't know, I also know the wave-particle duality of the photon, and I know that the speed of light is 299792458 meters per second. However, the cultivators of the Great Li Dynasty actually knew that light was a substance, and it was awesome, so what kind of golden crow, that is, the old lady of the sun, could use photons as needles, and it was even more awesome. In the universe, the only thing that can trap photons is a black hole, but we don't know how to do it.

Guo Dalu suggested: "Upstairs Immortal, please cast that spell like a little sun, and see how much the temperature in the greenhouse should reach, which is suitable for the growth of the Red Refining Fruit, with the thermometer, you can accurately control the temperature and not waste mana." ”

Lou Cen Zhi praised: "It turns out that this thermometer is used in this way, well, for a long time, the cultivation world has only known that the Red Refining Fruit likes heat, but no one has ever thought of it, carefully measure the heat--I am really confused, how much the heat is measured like an object, and only the Guo family kid can figure it out." ”

Lou Cen Zhi cast the Sun Burning Technique again, and at the same time let the Ruyi thermometer fly in and out of the greenhouse by itself, and he was very busy, Guo Dalu memorized the temperature data next to him and helped analyze.

But strange things happened, Lou Cenzhi's scorching sun technique was indeed good, under the irradiation of the small sun, the temperature in the greenhouse was rising steadily, and the plastic film was somewhat deformed because of the high temperature, but the strange thing is that after the red refining fruit grew well in the initial stage, it did not grow better with the increase in temperature, on the contrary, the leaves curled up a little.

Lou Cen was in a hurry, urging the scorching sun technique, boom, the plastic film greenhouse burned under the high temperature, the whole thing burned, although Lou Cen Zhi urgently summoned the ice dragon to extinguish the fire, the plastic film still burned most of it, and even the bamboo shed shelves were burned.

Guo Dalu and others couldn't stand the high temperature for a long time, so they hid in the corner of the workshop, saw the destruction of the plastic greenhouse, and secretly complained, does this greenhouse not work?

Guo Dalu suddenly thought of something, this plastic film greenhouse is the most commonly used planting method in the 21st century, because of this thing, you can eat out-of-season vegetables all year round, but there is a bad thing, that is, the greenhouse vegetables look watery, but there is not much taste, especially fruits.

That's because the sugar inside the fruit is only high in the case of a large temperature difference between day and night, and the greenhouse vegetables and fruits are not sweet enough because the temperature difference is not large enough, and even need to be manually injected with sweeteners.

This Great Li Dynasty's immortal wood red refining fruit is actually a plant itself, and plants have the nature of plants, could it be said that its growth is not proportional to the temperature, but related to the temperature difference?

Guo Dalu looked at the upstairs immortal with a depressed face, and said loudly: "Upstairs immortal, if you can trust the kid, please cast a spell according to the procedure that the kid said, and take a look at the growth of the red refining fruit again." ”

Lou Cen Zhi glanced at Guo Dalu deeply, this country boy had already given him a lot of unexpected surprises, he nodded: "Okay, you say, what should I do?" -- A cultivator actually listened to the guidance of a mortal with incomplete five elements, no one believed it! But Lou Cen Zhi faintly felt that Guo Dalu would definitely be able to surprise him and Lin Yuanchen's third junior sister.

Guo Dalu beckoned Li Dayan, Zhou Carpenter and other villagers, removed part of the plastic film that was not burned, and made a new shed - in fact, it can no longer be called a shed, but a big cover, but the body of the red refining fruit is not large, and it can be placed in the cover.

Guo Dalu asked Lou Cen Zhi to make two wishful thermometers, one outside the greenhouse and one in the greenhouse, and then he asked Lou Cen Zhi to perform the Sun Burning Technique again.

A ball of light rose outside the greenhouse, and the temperature began to rise, however, the onlookers next to them only felt a little heat, and Guo Dalu shouted: "Stop!"

Lou Cen Zhi was just about to put away the Sun Burning Technique, Guo Dalu hurriedly said: "Upstairs Immortal, please keep the Sun Burning Technique at this level - don't inject too much spiritual power and stabilize the temperature." ”

Lou Cen was stunned, this request is really weird, but it is not impossible, usually he casts the Sun Burning Technique, he directly releases a stream of spiritual power, and when the spiritual power consumption is exhausted, the Sun Burning Technique will disappear naturally, but now according to Guo Dalu's requirements, he slowly but continuously casts spiritual power, it is a little difficult to control accurately at the beginning, the small ball of light flickers on and off, but soon he mastered the trick, and the small ball of light stabilized.

Guo Dalu carefully observed the Red Refining Fruit inside through the plastic film, and while talking to himself, he took notes: "The temperature difference between the inside and outside is one degree, the leaves of the Red Refining Fruit are reddish, the buds are curled, and the leaf veins are blue-gray--okay, upstairs Immortal, please inject a little more spiritual power, so that the Sun Burning Technique can raise the temperature a little more--yes, yes, yes, that's it--okay, stop! Now the temperature difference between the inside and outside is two degrees, and the veins of the Red Refining Fruit are yellow--"

Lou Cen Zhi understood that Guo Dalu was looking at the growth of the red refining fruit under the different temperature differences inside and outside the greenhouse, he carefully controlled his spiritual power, under Guo Dalu's command, he warmed up for a while, cooled down for a while, and even sometimes directly summoned an ice dragon and sprayed a breath of cold air at the greenhouse.

Poor Li Dayan and others, not like Guo Dalu who has served Guben Pei Yuan Dan, has a special physique, at this time, it is cold for a while and hot for a while, and in the summer, he actually has a runny nose.

Guo Dalu and Lou Cen Zhi cooperated with each other, and after half a day, they finally determined the best cultivation temperature of the red refining fruit.

Lou Cen Zhi looked at the red refining fruit in the greenhouse with a complicated expression, and the red refining fruit with bright flavors and veins exuding golden light - this is the best performance of the red refining fruit, and then looked at Guo Dalu, who was sorting out the long string of data on the paper, and sighed: "I really didn't expect that this red refining fruit is not the higher the temperature, the better, but when there is a difference of ten degrees between the internal and external temperatures, the growth is the best." Alas, for thousands of years, countless cultivators only knew how to consume spiritual power or borrow the innate earth vein spiritual land to forcibly raise the temperature to promote the growth of the Red Refining Fruit, and no one thought to investigate the reason in detail. In the end, it was Guo Dalu who woke up the dreamer with your words. I originally thought that your invention of drip irrigation was just a whim, but now it seems that your science has some way. The so-called three thousand avenues can be enlightened, and the sages are honest and do not deceive me. Guo Daoyou, thank you for your sincere help, Lou Cen is polite. "-------------------------------------------------------------------------------------------------------- thanks to chen370420, the holy angel, and the obscene laughing happy tip.