Autumn hasn t arrived, why the leaves have fallen to the ground

In autumn, the leaves fall off, which is already characteristic of autumn, when the green leaves first turn yellow or crimson, and then are blown off the trees by gusts of cold winds. What is the reason for this?

The leaves of plants play an important role in the biosphere. They use solar energy to synthesize nutrients and release oxygen into the atmosphere, but this is only possible in the presence of heat, water and light. When the cold comes, the leaves are in active working condition, and the plant is vulnerable to injury.

Because photosynthesis requires a constant, large amount of water. When the air and soil temperatures drop, the cold kills the protected plants and turns the water in their cells into ice. To prevent this, the plant gets rid of excess water and sheds its leaves, which in order to adapt to climate change.

In this way, the leaf shedding protects the plant from dehydration. It can be seen that leaf shedding in autumn is a method used by plants to protect themselves.

Autumn is an extremely important time for life in nature, and leaf fall is also a preparation for the normal growth of trees in the coming year.

One is caused by recent rainfall, the second is whether the leaves have disease spots, and the third is whether there are aphids or whiteflies on the back of the leaves. You can buy some enemy killing, add some agricultural streptomycin spray, and the leaves will not fall prematurely.

Because autumn means the onset of winter, trees need to dormant in order to protect themselves, and overwintering dormant trees themselves.

Because the wind is very strong, and the rain is also very heavy.

1. The beautiful autumn has arrived, and the golden leaves have fallen;

2. The silent autumn has arrived, and the withered yellow leaves are slowly falling;

3. The quiet autumn has arrived, and the beautiful leaves have fallen;

Problem solving ideas: Sentence writing is specific, which is equivalent to expanding the sentence, and the minimum requirement for expanding the sentence is one place; You can start with what kind of autumn, what kind of leaves, and what kind of fall.

Summary. Hello dear! We are glad to be able to assist you.

There is not enough moisture, temperature, and sunlight in the fall, so the leaves fall off in the fall. The main use of green leaves is to absorb sunlight for photosynthesis to make nutrients, as well as to transpirate water. Transpiration of water keeps trees from burning in blazing sunlight.

Usually the higher the temperature, the more water transpirates from the tree. In autumn and winter, when rain is scarce and the air is dry, the moisture content of the soil also decreases, which cannot meet the needs of tree growth. So the leaves will fall in the fall.

Hello dear! We are glad to be able to assist you. There is not enough moisture, temperature, and sunlight in the fall, so the leaves fall off in the fall.

The main purpose of green leaves is to absorb sunlight, lihail for photosynthesis, make nutrients, and transpirate water. Transpiration of water keeps trees from burning in blazing sunlight. Usually the higher the temperature, the more water transpirates from the tree.

In autumn and winter, when rain is scarce and the air is dry, the moisture content of the soil also decreases, which cannot meet the needs of tree growth. So the leaves will fall in the fall.

Hello dear! We are glad to be able to assist you. There is not enough moisture, temperature, and sunlight in the fall, so the leaves fall off in the fall.

The main purpose of green leaves is to absorb sunlight, lihail for photosynthesis, make nutrients, and transpirate water. Transpiration of water keeps trees from burning in blazing sunlight. Usually the higher the temperature, the more water transpirates from the tree.

In autumn and winter, when rain is scarce and the air is dry, the moisture content of the soil also decreases, which cannot meet the needs of tree growth. So the leaves will fall in the fall.

This is a normal physiological phenomenon of trees, and it is also an adaptation of trees to adverse climatic conditions such as low temperature and drought.

There are two kinds of leaf loss of trees: one is that whenever the cold season comes, the leaves of the whole tree die and fall off at the same time, leaving only bald branches; The other is that after the new leaves grow in spring, the old leaves gradually wither, and the fallen leaves are not concentrated in a period, and the trees are green all year round from the appearance, so they are called evergreen trees. Such as pine and cypress.

1. The leaves of plants play a very important role in the biosphere, they use solar energy to synthesize nutrients and expel oxygen into the atmosphere, but this can only be achieved in the presence of heat, water and light, when the cold comes, plants with leaves in an active working state are very vulnerable.

2. Because photosynthesis requires a constant stream of water, a large amount of water, when the air and soil temperature decreases, the cold can kill the unprotected plants, turning the water in their cells into ice, in order to prevent this, the plants get rid of excess water, drop the leaves, and adapt to the change of climate with the fallen leaves, so that the leaves fall off can protect the plants from dehydration, it can be seen that the leaves fall off in autumn is a method used by plants to protect themselves.

3. Autumn is an extremely important period for natural creatures to recuperate, and falling leaves are also a kind of preparation for the normal growth of trees in the coming year.