When Xiang Tianliang woke up from the grass, it was already eight o'clock in the evening, and the desolate and populated surroundings were already dark.

Zhou Biyang, who was in charge of security, had put on night vision goggles. He told Xiang Tianliang that he had just finished talking to Xiao Jiannan, Shao Sanhe and Zhang Meng on the phone. Everything was normal and there was no abnormal movement on the other side. We are on standby.

While reporting in a low voice, Zhou Biyang woke up Jiang Xueming and Liu Wei,

"Confirm our current position again," Xiang Tianliang put on his night vision goggles.

Zhou Biyang's voice was still very low, "Based on the center point of the eucalyptus forest, we are at the five o'clock direction, about 950 meters away from the edge of the eucalyptus forest. There is a swamp on the right at the five o'clock direction, about 100 meters away from us. Ten meters,”

Xiang Tianliang patted Jiang Xueming's shoulder, "Team Jiang, set off in the original order, take the center point of the eucalyptus forest as the benchmark, proceed in a straight line for 800 meters, and arrive within half an hour."

Jiang Xueming responded, and after confirming the direction with the compass, he picked up his bag and gun, and quickly disappeared into the night.

Traveling 800 meters in half an hour is like taking a walk. Fortunately, there is still a long time until twelve o'clock, so there is no need to rush.

The four people gathered around a sand bag again, holding an infrared telescope toward Tianliang, and observed the eucalyptus forest 150 meters away for a long time.

"Something's happening," Zhou Biyang asked in a low voice,

Xiang Tianliang hummed, his tone a little solemn,

Zhou Biyang took the infrared telescope and observed it.

"You are indeed prepared," Zhou Biyang sighed in a low voice,

Xiang Tianliang said: "There is an infrared protection net fifty or sixty meters away from the edge of the eucalyptus forest,"

Jiang Xueming asked hurriedly: "What is infrared protection network?"

"It's very simple to say, but very practical. It is to coat some ordinary iron nails with a special chemical raw material, which can make the iron nails emit low-frequency infrared rays within a few hours, spreading these iron nails into a line, This iron nail line forms an infrared protection network, and only one infrared signal receiving monitor is needed to monitor a kilometer of infrared protection network. Once we walk over, we only need to slightly cover or step on such an infrared protection network. When the iron nails are pressed, the monitor will prompt, or chirp, vibrate, or flash, and they will find out that someone is intruding and from which direction they are intruding, so they can be prepared to fight or retreat."

"So awesome," Liu Wei sighed,

Xiang Tianliang said again: "And this infrared protection net is too easy to set up. If you hold an iron nail and throw it while running, you can complete at least forty meters in one minute. Let me see, there are more than one infrared protection net laid by Old Wolf. , there should be another one, probably located at the edge of the eucalyptus forest,"

"How do we get there?" Jiang Xueming asked,

Xiang Tianliang asked: "Think about it, in which direction around the entire eucalyptus forest is there no infrared protection net?"

Jiang Xueming said: "The swamp to the east,"

"Haha, so," Xiang Tianliang laughed,

Zhou Biyang was surprised when he heard this, "Xiang County Magistrate, you don't want to enter from the direction of the swamp,"

Xiang Tianliang smiled and said, "I don't want to go in from the swamp, but that doesn't mean I'm not prepared for this."

"You, you are sure," Zhou Biyang was shocked by Xiang Tianliang's boldness,

Xiang Tianliang squatted down and took a measurement with the compass, "Now, everyone, follow me and move towards the swamp."

The swamp is a mysterious and scary place,

More than ten minutes later, Xiang Tianliang and the other four people arrived at the swamp.

Here, less than seventy meters away from the edge of the eucalyptus forest, the infrared protection net is just a dozen meters away.

The four people were lying on the ground, using night vision goggles to look at the swamp a few meters away.

Knowing that Zhou Biyang, Jiang Xueming, and Liu Wei had doubts about the swamp, Xiang Tianliang had no choice but to "popularize" this knowledge.

"Actually, swamps are not terrible. The so-called swamps refer to muddy areas that have been soaked in stagnant water for a long time and have dense aquatic plants. The upper part of the soil profile is saprolite swamp soil or peat swamp soil, and the lower part is the latent layer. Its organic matter content It is high, with strong water-holding properties and weak water permeability. The volume will shrink when drying. After drainage, the soil will be well aerated, organic matter can be decomposed, and the fertilizer content can be increased."

Zhou Biyang smiled bitterly in a low voice, "Xiang County Magistrate, the swampland can be used as fertilizer, you should tell the farmers in the county,"

Xiang Tianliang said with a smile: "There are many kinds of swamps. One kind evolves from lakes into swamps. In areas with humid climate, river water carries sediment and flows into the lake. Because the water surface suddenly widens, the water flow slows down. Slowly, the ability to carry sediment weakens, and the sediment is deposited on the edge of the lake to form a shoal. There are also some tiny substances that drift to the wide part of the lake with the current and are deposited on the bottom of the lake. As time goes by, the lake changes The lake becomes shallower and shallower, and various aquatic plants gradually multiply in different locations of the depth of the lake. In the depths of the lake, various algae such as eye cabbage grow. In the deeper areas, duckweed, water lilies, water buoys grow. In the shallow water areas along the coast, reeds, cattails, etc. grow. They continue to grow and die, and a large number of rotten remains accumulate on the bottom of the lake, eventually forming peat. As the bottom of the lake gradually becomes shallower, new plants appear. And developing from all sides to the center of the lake, the lake becomes shallower and smaller, and finally, the lake with a wide water surface turns into a shallow swamp with overgrown water and grass. "

Jiang Xueming said: "When I was studying, I heard my geography teacher say that the swamps here are formed by lakes and cover an area of ​​at least seven square kilometers."

Xiang Tianliang hummed, and then said: "In addition to the swamps that evolved from lakes, there are several other situations. First, in forest areas, dead branches and leaves continue to accumulate under the forest, just like covering the ground with a thick layer. The quilt can not only store a large amount of rainwater, but also reduce the evaporation of soil water, keeping it in an overly moist state. During the carbonization process, most of the mineral nutrients in the soil are lost, causing the vegetation to die and lush bryophytes to replace it. Plants can retain a large amount of water, which slows down the decomposition process of plant residues. Peat gradually accumulates and forms swamps. Secondly, in some areas that are too humid, weeds can multiply in large numbers and form thick grass layers, and soil ventilation conditions change. Bad, the carbon content gradually decreases, causing the original plants to gradually decline, and moisture-loving plants such as sphagnum moss grow. They have strong water storage capacity, which further strengthens the moist condition of the soil, and meadow swamps develop rapidly. 3. In some plateaus and alpine areas, the ground is covered with snow in winter. In the spring of the following year, the snow and ice melt and the ground accumulates water, causing short grasses and bryophytes to grow together, which can also form swamps. 4. Along the rivers in low-lying plains, Where the river is shallow and flows slowly, aquatic plants can grow and gradually form swamps. 5. Coastal lowlands are repeatedly flooded by sea water, and the beaches are overgrown with reeds and weeds, which can also form salt marshes."

Liu Wei asked curiously: "Xiang County Magistrate, is this swamp really evolved from a lake?"

Xiang Tianliang said: "Team Jiang is half right. This swamp evolved from a lake, but it is also a salt swamp because it was part of the sea thousands of years ago. Therefore, its swamp is Among the substances, salt accounts for about 50%, water accounts for 30%, and other substances account for 20%. The higher the salt content, the greater the buoyancy. Therefore, as long as a person crawls over, he will never sink. Only fools would test the swamp with both feet,"

Zhou Biyang asked: "How did you know?"

"Haha, this used to be military land, and the information is now kept at the county armed forces department. You will know it once you check it,"

"Yes, it seems that you have already planned and wanted to visit this swamp," Zhou Biyang sighed.

Xiang Tianliang said: "Yes, I like swamps because I have experienced it before, so I have done some research on it. In fact, swamps are not terrible. Their formation is very simple and mainly depends on water and heat conditions and topography. Among them Moisture conditions are the dominant factor in the formation of swamps, because an overly wet surface can cause the invasion of hygrophilic plants, which will lead to changes in soil ventilation conditions and the accumulation of peat under the action of organisms. Generally speaking, the formation of swamps can be divided into Swamping of water bodies and swamping of land. The change of lakes into swamps means the swamping of water bodies. The swamping of soils is due to the long-term accumulation of water on the ground or the seasonal accumulation of water, as well as the influence of groundwater immersion. The soil is too wet for a long time, and the action of hygrophytes and The process of bioaccumulation of organic matter and reduction of mineral elements under anaerobic conditions. Do you know where the grassland that the Red Army walked through was? In the west of our country, there is a large grassland with endless aquatic plants, dense grass stems and rotten grass. Underneath the grass is black stagnant water with a very soft surface. If a person walks on it and doesn't pay attention, his life will be in danger. This is a swamp."

Jiang Xueming said with a smile: "The Red Army walked over, we can crawl over, because we are only a hundred meters apart at most,"

Zhou Biyang asked again: "Hey, you should tell me what to do if you are in danger in the swamp. After all, you need to be prepared."

"As I said, swamps are not scary. Of course, there are dangerous swamps whether in the highlands or lowlands. If you fall in accidentally, you may die. As for the method of survival, it is the same as when you are trapped in quicksand. Likewise, don't struggle, lie down, try to expand the contact area between your body and the quagmire, and slowly swim to a safe area to escape. So, how to identify dangerous quagmire? Quagmire is usually found in swamps or chao, wet, soft and muddy areas. In the wilderness area, you need to be even more careful if you see black flat land with no grass growing on it. At the same time, you should pay attention to the green sphagnum moss swamps. Sometimes, the sphagnum moss covers the surface of the swamp like a carpet. In fact, this is the most dangerous trap. Well, if you have to walk through a place full of mire, you should walk along the high ground where trees grow, or step on the stone moss, because trees and stone moss grow on hard ground. If you are not sure which way to go, You can throw a few big rocks forward to see if the ground is hard, or stamp your feet hard. If the ground trembles, it is probably a quagmire and you should take a detour. If you are trapped in a swamp, you can follow the self-rescue method in quicksand. The method of self-rescue is exactly the same. Also, how do you maintain your life when you are stuck in a swamp? In the vast swamp area, the biggest threat is the wet and cold weather. If you get your clothes wet and exposed to the cold wind, you will It will be easy to be frozen, so you should find a place for animals to avoid wind and rain as soon as possible, such as woods, bushes, caves, rocks, embankments, etc., which are all good places to avoid wind and frost. At the same time, collect rainwater or melt ice and snow as Drinking water, but in the case of heavy rain, heavy snow or dense fog, do not risk going out unless necessary, but wait until the weather improves before walking to a safe place nearby..."

Zhou Biyang smiled and said, "Just tell us how we can get there now."

"Wear a raincoat to prevent water from entering the clothes, because water in the clothes will increase the weight of the body,"

Liu Wei took out four sets of rubber raincoats from his bag, and the four of them put them on respectively and tied them tightly.

Then, lying on the ground toward the dawn, like a frog,

"Look, this is the posture of a frog, but remember, don't learn to jump like a frog, but maintain the posture of a frog, try to keep your chest and abdomen on the ground, and then use your arms and legs to move forward slowly. "

Zhou Biyang couldn't help but laugh again, "It doesn't matter, as long as we can cross the swamp, you can let us learn how to pickpocket with dogs,"

"Also, I am first, Team Jiang is second, Team Liu is third, and Zhou Ju is behind. Keep a distance of about five meters. Note, if you find your body sinking, don't move around. As long as you send a signal, I will I’ll find a way to save you,”

After saying that, he started to crawl towards the swamp towards dawn,

The others did not dare to neglect, and crawled cautiously like they were facing the dawn,

There is grass on the ground, which is getting softer and softer, and is shaking, as if crawling on the deck of a ship.

The distance is only a hundred meters, but it seems to be endless, long and terrifying.

Xiang Tianliang is actually very careful himself. He is a pathfinder. As long as the general direction is good, he should try his best to climb onto the softer ground that is relatively hard.

After twenty minutes, Xiang Tianliang's hand finally touched a stone. He hurriedly stretched out his other hand. Yes, it was a stone.

Cheering in his heart, Xiang Tianliang hugged the stone with both hands, exerted force on his arms, and his body flew up like a piece of wood and landed gently on the ground.

Looking further back, there is a stone wall, about six meters high. At the top of the stone wall, there are eucalyptus trees pointing straight upward.

The eucalyptus forest has arrived,

Wave towards the dawn and towards the way you came,

Jiang Xueming also arrived. Xiang Tianliang grabbed his hand and pulled him up.

There was no danger, Liu Wei and Zhou Biyang also arrived safely one after another.

The four people took off their rubber raincoats first and threw them all into the swamp.

Zhou Biyang came close to Xiang Tianliang, panting, and asked quietly: "You just said that if you sink, you will have a way to save yourself. What is the way?"

"I'm already here, so there's no need to say anything," Xiang Tianliang responded, holding back a smile.

Zhou Biyang was very serious, "Tell me the good method and I will publicize it to prevent others from accidentally falling in,"

"Oh, I lied to you. If you sink, you're doomed. There's no way you can save it."

"ah……"
Chapter completed!