Why do plants excrete oxygen 10

CO2 + H2O === (light, chlorophyll) C6H12O6 + O2 photosynthesis is the largest process on Earth in which inorganic matter is converted into organic matter (about 425 billion tons per year), and it is also the process by which solar energy is converted into chemical energy and stored in the synthesized organic matter (about megajoules per year). Only green plants (and photosynthetic bacteria) on Earth can intercept energy directly from sunlight through photosynthesis, and use it to reduce inorganic matter (carbon dioxide) to organic matter as their own nutrients. Other organisms, including humans, do not directly use solar energy, but directly or indirectly rely on the organic matter and energy provided by the photosynthesis of green plants for life activities.

Therefore, photosynthesis ensures the progress of life activities and the continuation of life in the entire biological world. Since photosynthesis assimilates carbon dioxide and releases oxygen, the amount of carbon dioxide and oxygen in the atmosphere remains basically stable for a long time. In addition, photosynthesis is also important for biological evolution.

There was almost no free oxygen in the primitive atmosphere on the earth, and about 3 billion years ago, the earliest cyanobacteria with photosynthetic ability appeared, and the accumulation of oxygen began on the earth, creating conditions for the occurrence and development of aerobic organisms. It can be seen that photosynthesis is the fundamental source of survival, prosperity and development of life on earth.

The real reason for photosynthesis in plants is to produce food (organic matter, glucose and starch), which converts carbon dioxide, water, oxygen, etc. into organic matter under the action of the sun, separating oxygen in the process and then releasing oxygen.

Through photosynthesis, carbon dioxide is absorbed, oxygen is released and at night, plants absorb oxygen, carbon dioxide is released by respiration.

Plants absorb carbon dioxide and excrete oxygen.

Because plants have.

Photosynthesis.

Because plants also consume energy at night.

During the day, plants obtain energy from sunlight through photosynthesis and store it in sugars or starches, the products of photosynthesis, so plants absorb carbon dioxide and release oxygen during the day.

But plants also consume energy at night to survive. If there is no light at night, photosynthesis cannot be carried out, so plants can only obtain energy from the carbohydrates synthesized through photosynthesis during the day, that is, the energy released by the decomposition of carbohydrates. The decomposition of these substances requires the consumption of oxygen.

So the plants absorb oxygen and release carbon dioxide at night. This is the uptake of the plant, which is the opposite of the result of photosynthesis.

During the day, the plant undergoes photosynthesis through sunlight, releases oxygen, and absorbs carbon dioxide, and at night, because it loses the exposure of sunlight, then it absorbs oxygen and produces carbon dioxide, which is the opposite process.

For the sun rises in the east.

What plants release oxygen at night and are suitable for keeping in the bedroom?

Plants release oxygen through photosynthesis during the day and absorb carbon dioxide; At night, oxygen is absorbed through respiration and carbon dioxide is exhaled.

Plants will absorb oxygen, plant respiration and human respiration need the same oxygen, during the day green plants photosynthesize, release oxygen, at night when there is no light, plants will respire to absorb oxygen, release carbon dioxide, but some plants can also release oxygen at night, such as tiger pill orchid, white palm, spider plant, ivy and gerbera, etc.

Plants will absorb oxygen, plant respiration and human respiration need the same oxygen, green plants carry out photosynthesis during the day, the generation of oxygen is greater than respiration, at night there is no sunlight, plants can only respire, to absorb oxygen, release carbon dioxide.

Most plants release carbon dioxide at night, but some plants can release oxygen at night, such as tiger pill orchid, white palm, spider plant, ivy and gerbera, etc., which can be cultivated at home, which can effectively purify the air and promote human health.

The leaves of the plant can carry out photosynthesis, absorb harmful gases in the air, release oxygen, have the effect of purifying the air and improving air quality, and the plant also has the effect of beautifying the environment, adding a touch of color to the city scenery, especially the garden plants, which have high ornamental value.

Plants have six major organs, namely roots, stems, leaves, flowers, fruits and seeds, among which roots, stems and leaves are the vegetative organs of plants, and the fruits contain many seeds, and the seeds are formed after fertilization of the ovules of seed plants, which are composed of seed coats, embryos and endosperms.

Plants absorb oxygen at night, but they absorb less oxygen, which is not harmful to health under normal circumstances. Precautions for indoor maintenance of plants: if the smell of plants is too strong, it is easy to over-excite the nervous system center and cause insomnia, and the fragrance of some plants may also cause nausea symptoms, so it is necessary to maintain it carefully; Do not be in a closed environment with plants at night, and open windows to maintain air circulation.

Plants absorb oxygen at night, but they absorb less oxygen and are not harmful to health under normal circumstances. There are also some plants that release oxygen at night, such as: tiger pill orchid, agave, cactus, swallow's palm, measuring scale, sedum notoginseng, etc.

These plants open their stomata at night to absorb carbon dioxide from the air and release fresh oxygen, making them ideal for indoor maintenance.

Plants and people are the same as living activities, since the existence of life activities need to consume energy, in addition to external attacks, plants themselves will also carry out respiration to absorb energy, therefore, plants are respiring at any time, but the sun is sufficient during the day The plant is photosynthesis, and the lack of light at night stops photosynthesis and respiration, so it can only absorb oxygen and release carbon dioxide.

Precautions for indoor maintenance of plants.

If the indoor maintenance of plants with smell, it needs to attract attention, if the smell is too strong, it is easy to make the nervous system center overexcited and cause insomnia, and the fragrance of some plants may also cause people to regurgitate symptoms, so be careful in the maintenance process, can not ignore this kind of problem.

Many people think that plants can absorb carbon dioxide and purify the air indoors, but some plants will carry out anaerobic respiration at night to release carbon dioxide, so do not be in a closed environment with plants at night, and open windows to keep air circulation.

Plants also need oxygen for respiration, but the photosynthesis of green plants during the day, that is, the production of oxygen is greater than respiration, and in general it seems to release oxygen. At night, when there is no light, only respiration is carried out, which is to absorb oxygen and release carbon dioxide. In terms of total volume, the photosynthesis of a plant is greater than that of respiration, so it still releases more oxygen than it consumes by respiration.

Photosynthesis causes plants to accumulate carbohydrates, and respiration is the consumption of carbohydrates to produce energy for the plant body.

Green plants, like us humans, also have to absorb oxygen, and plants must also carry out aerobic respiration, decompose organic matter and release energy to maintain their own metabolic consumption. Plants release a lot of oxygen during the day, just because the plants are daytime.

The intensity of photosynthesis.

greater than the intensity of breathing.

So the net output is oxygen. When there is no light at night, the plant stops photosynthesis and only absorbs oxygen, but does not release it.

The first is to make it easier for the roots of the plant to absorb oxygen, as oxygen does not easily enter without loosening the soil. Secondly, loosening soil keeps the soil in a relatively bulky state, which is also conducive to the uniform distribution and absorption of water and nutrients.