N-A-A Chapter 167
Chapter 167
Shen Bing looked around: "Lu Zhe, it should be an extinct volcano, the vegetation here is too dense, and it is impossible to reach such a situation for decades."
Lu Zhe put the shallow on a relatively clean stone: "The species and vegetation here are dense, and the variety is beyond the scope of ordinary people's understanding. The point is that deep in the sinkhole-like bottom of the volcano, vegetation grows so strongly.
Shen Bing looked up: "The crater looks less than 200 meters from the bottom, and from the outside, this volcano is at least 300 meters above sea level, which means that the altitude of the bottom of the volcano is also quite high, at least much higher than the camp."
Lu Zhe smiled: "That's right!" From the side profile, the diameter of the bottom of this volcano is similar to the height of the side wall, so when the angle of the sun and the surface is greater than 45 degrees and less than 135 degrees, the vegetation at the bottom of the cave can still enjoy direct light.
Lin took out a book from the plastic bag and calculated: "Assuming that the height and diameter of the side wall of the volcano are equal, and the line connecting east and west is made as the diameter, any point in the diameter is 45 degrees connected to the mouth of the cave, and 45 is removed to 180, which is a quarter."
And we are not far from the equator, the length of day and night is similar, multiplied by a quarter by 12 hours, which means that the light on the same diameter as the sun's trajectory at the bottom of this volcano is only 3 hours, the direct light in other locations is less than three hours, and there is no light even in the corner due north and south all day!
Lu Zhe nodded: "You are right, you can see from the density of the vegetation below that the vegetation on this line from due east to due west is stronger than in other places." Although the due south and north are also very luxuriant, most of them are shade-loving plants.
Shen Bing looked at Lu Zhe's solemn face, and said with a slight regret: "But three hours of light is still too little."
"More than three hours."
Lu Zhe pondered for a while: "Just now we only considered direct light, and direct light alone cannot make the plants here so luxuriant, in fact, the plants here rely more on indirect light."
Shen Bing and Shallow looked at each other: "Indirect light?
Lu Zhe looked up: "Remember Xiang Ji Xuanzhi, a literary scholar of the Ming Dynasty?" There are four windows in front, and the wall is surrounded by the courtyard, with the southern sun, the sun and shadow reflect the reflection, and the room is open.
Lin Qianshian: "Remember."
Shen Bing smiled bitterly: "Only a little impression."
"He opened the window in the north, but he couldn't enjoy the south light, so he built a wall in the window, and the light shone on the wall, and the room lit up with it."
Shen Bing nodded: "That's right, it's past four o'clock now, and when the sun sets, it's not as dark as expected."
Lu Zhe pointed to the inner wall of the volcano: "The inner wall of this volcano is about 90 degrees perpendicular to the surface, this inner wall can not hold bird droppings, there is no way to form soil attached to the mountain, even if it is attached, it will be washed away by a large amount of rain, re-exposed
and smooth inner wall of volcanic rock, there are grand silica and rock crystals, will make the inner wall reflect some light under the sunlight, although much weaker, but more suitable for the growth of temperate fruits."
"Great!" Lin shallow exclaimed happily and asked, "But does this light produce photosynthesis?"
"As long as there is blue-violet light and red light in the light, it can promote the photosynthesis of plants, whether it is reflected light, refracted light or diffracted light, all of them!"
Shen Bing said: "I know this, the fruits and vegetables grown in the greenhouses in my hometown use Led and other lights to supplement the light when the light is insufficient to improve the harvest."
Lin said happily: "That's great, you can grow fruit seeds here." When do we start?
Lu Zhe sighed: "It's not easy!" Even if the soil problem and the light problem are solved, there are some more difficult problems to solve.
"What problem?"
"First, it's the problem of heavy rain, I don't know if there is a place for rapid drainage at the bottom of the pit, if there is okay, if not, like the heavy rain that fell for seven days, this place will basically become a natural pool."
Second, if the drainage is too fast, how can we bring in water through the sulfur springs in the dry season, and it will definitely not work by filling it with bottles.
Third, there is the problem of land reclamation, the east-west diameter line is the best planting point, but you look at so many tall and low trees, it is impossible to cut down a planting land with today's tools.
And fourth, that is, these birds, they provide a lot of fertilizer for the land, but they also like to eat all kinds of fruits, and our strawberry watermelons are estimated to be half planted by them.
Shen Bing nodded, she understood that every situation Lu Zhe said was a real problem, and if these problems were not solved, no amount of energy and time would be spent on the bamboo basket.
However, these problems do not seem to be unsolvable, and she firmly believes that in the future birthday court, Lu Zhe can think of a reliable way.
Lu Zheben also wanted to go down to the bottom of the volcano to take a look, but looking at the time, the sun will soon set, and if he does not go back at this time, I am afraid that he will spend the night here.
"Let's go, the squad leader will be in a hurry, let's come back in a few days,"
"Well, they're hungry!"
Lu Zhe picked up the shallow again, and the three entered the cave to prepare to return to the camp.
However, when he returned to the pool, Lin Qiansha suddenly jumped out: "It's so hot!"
Lu Zhe also found that the temperature of the pool water has increased significantly.
It used to be around 40 degrees, but at night, it reached 50 degrees!
Don't look at the difference of only 10 degrees, but this water temperature Lu Zhe can barely pass, and Sister Bing and Shallow will never swim through that passage.
"How is this temperature getting higher!"
"It's too hot to soak your feet!"
"Could it be... Is volcanic activity intensifying?
Lu Zhe pondered for a while: "Two possibilities!" One is increased volcanic activity! The other is that different periods of cold or warm currents and magma cause different results, you see, not only the temperature has increased, but the water level of the pool is also much higher than before.
Shen Bing nodded: "You mean, during the day, the cold current flows below the volcanic island, and the warm current at night is driven below the volcano, and the sea water at different temperatures meets the magma to produce different amounts of steam."
Lu Zhe nodded: "That's what it means, but this is just speculation!" If you want to prove it, you can only see during the day to see if the water temperature has returned to the original temperature. Otherwise..." Speaking
of this, Lu Zhe nodded worriedly: "It is really possible that it is volcanic activity."
Shallow worried: "So what now!"
Lu Zhe thought for a while: "What else can I do?" I can only stay here for the night, and tomorrow we will find a way to go back." "
In the hole?"
Lu Zhe weighed it up: "Well, although it is difficult, but fortunately it is very warm in the cave, let's wash our feet again, rest by the pool, and take a sauna!"
Shen Bing nodded: "That's it." "