Why do earthworms migrate What does it mean for a large number of earthworms to crawl out of the gro

A large number of earthworms. Crawling out of the ground simply means that oxygen is scarce inside the land. The earthworm is breathing with its outer **, like soil after rain.

Hypoxia is medium, full of stagnant water, and it is difficult for earthworms to breathe oxygen, so they can only come to land.

High yield, economic benefits.

Good. Earthworms can be used as a valuable medicine** for many diseases, and can also be used as high-protein food and feed. Earthworms dig holes to loosen the soil, decompose organic matter, create good conditions for the growth and reproduction of soil microorganisms, and improve soil improvement, eliminate pollution, protect the ecological environment, and in material circulation and biodiversity.

At present, many countries use earthworms to dispose of household waste.

Organic waste and purified sewage.

Earthworms contribute to the material circulation and energy transfer of soil processes through activities such as feeding, digestion, excretion (vermicompost droppings), secretion (mucus) and burrowing, and are soil invertebrates that have an important impact on many processes that determine soil fertility.

One of the taxa (mainly earthworms, mites, and ants) and is known as "ecosystem engineers".

The structure of the body wall consists of cuticles.

It is composed of epidermal cells, ring muscles, and longitudinal muscles, and the muscle layer is a body cavity membrane. There are well-developed glandular cells in the epidermal cells that secrete mucus moist ** to facilitate movement in the soil.

The mode of movement is peristaltic contraction. Several somites form a group, one group of medial longitudinal muscles contract, the ring muscles relax, and the somites shorten, while pressure in the body cavity increases, and bristles stick out to attach. In the adjacent somite group, the annular muscle contractions, the longitudinal muscle relaxes, the somites lengthen, the pressure in the body cavity decreases, and the bristles are retracted.

Each somite group alternately contracts the longitudinal and annular muscles with the adjacent somite group, causing the body to move forward in waves. The earthworm can advance 2-3 cm with each contraction, and the direction of contraction can be reversed, so it can do backward movements.

Dark, earthworms are photophobic.

Moist, earthworms need water dissolved oxygen to penetrate the breath.

Warm, egg cocoons have hatched in large numbers.

The soil is overheated, the vermicompost in the vermicompost bed absorbs heat up, and the earthworm leaves the bed.

The soil is too cold and the vermicompost bed is damp. The air humidity is too high, and the earthworms escape.

Earthworms forage for food, and earthworms look for places with suitable temperatures.

I am the director of the China Earthworm Research Institute. Everything is subject to what I say.

<> earthworms crawling out of the dirt may be due to insufficient oxygen levels in the soil. When the weather is hot or rainy, the soil has more moisture content, and the earthworm's ** cannot breathe after being wrapped in water, so it will crawl out to breathe oxygen.

Earthworms live in the soil underground, have no respiratory organs, and if you look closely, you can see that its body wall is densely covered with this large number of capillaries, and the earthworm chazhou suspects that mucus secretes mucus on the surface of the body, and after oxygen dissolves in it, it slowly enters the capillaries of the body wall. The soil underneath is usually loose, with enough voids to hold water and air.

Once the heavy rain strikes, the earthworms will be flooded and unable to breathe, and if they want to survive, they have to climb out of the ground to breathe air, so that a large number of earthworms gather on the ground after the rain.

Why do earthworms burrow out of the soil and onto the ground on rainy days? A: After heavy rain, earthworms will burrow out of the soil and come to the ground because the rain will squeeze the cracks in the soil, causing the oxygen in the soil to decrease and the earthworms will not be able to breathe properly.

Test Center] Characteristics of earthworms. 【Analysis】Earthworms belong to annelids, which breathe with their body walls and breathe oxygen in the air. After heavy rain, there is too much water in the soil, and the rain squeezes out the oxygen in the soil crevices, and the oxygen is insufficient, and the earthworms cannot breathe in the soil, so the earthworms come to the ground to breathe in order to breathe.

Answer] Solution: Earthworms rely on the moist body surface to breathe, and their body walls are densely covered with capillaries, and the oxygen in the soil first dissolves in the mucus on the body surface, and then seeps into the body wall, and then enters the capillaries of the body wall. Carbon dioxide in the body is also excreted from the body surface through the capillaries of the body wall, and the earthworm's breathing depends on the body wall that can secrete mucus and always keep it moist.

So the answer is: the rain squeezes the cracks in the soil, and the earthworms don't get enough oxygen, so they will burrow out of the soil and into the ground. The key is to know that earthworms rely on the moist body surface to complete gas exchange.

Hello! 1.Earthworms are negative phototaxis, especially to avoid strong sunlight, blue light and ultraviolet rays, but are not afraid of red light, tend to weak light.

In the morning the air is good and the light is weak, and it comes out for a breath of fresh air. 2.The land is polluted and there are toxins underground, forcing earthworms to crawl out of the ground, even if they die.

This phenomenon is now common because most of the land is polluted. Thank you! Good luck!

Mr. He, the earthworms you said are terrible???

Earthworms are trichopod oligochaetes and generally live in moist, loose, organic-rich soils at depths of 10-30 cm in dark, damp soils. In particular, fertile gardens, vegetable gardens, cultivated fields, ditches, rivers, ponds, canals, sewers, garbage heaps, and water tanks near the cafeteria. The wetness of the body surface is also closely related to the respiration of the earthworm, because it does not have a special respiratory organ, and mainly exchanges oxygen and carbon dioxide through the moist epidermis.

Earthworms need good ventilation to replenish oxygen and expel carbon dioxide. It is particularly sensitive to ammonia, flue gas, etc. When ammonia exceeds 17 parts per million, it will cause an increase in earthworm mucus secretion and the death of clusters.

Although a damp place is the best living environment for earthworms, when it rains, it is obvious that the soil surface is more compacted than on a sunny day due to the infiltration of surface water, and the soil breathability suddenly decreases, so they need to crawl out to breathe.

Earthworms are generally in a more humid place, and the dirtier the place, the more likely it is to have it, try the side of the garbage bin, or near the wild tree, we have a mulberry garden (where mulberry trees are planted) and there is a lot of garbage in it, it is recommended that you find such a place to try it!

In a damp place there and a level box may be right.