What is the main reason for plant weight gain?

Photosynthesis, through which plants synthesize organic matter and store it in the plant. The absorption is the absorption of water and inorganic salts in the soil, of which the water is mainly used for transpiration and is lost to the body, and the amount of inorganic salts is very small. You can understand this in conjunction with Helmont's experiments and the use of water during corn growth.

In 1648, a Belgian scientist Helmont devised such an experiment: he planted a willow sapling weighing 2 5 kg into a wooden barrel containing soil that had been weighed in advance. After that, he watered the saplings only with pure rainwater every day.

To prevent dust from falling, he also made a barrel lid. Five years later, the willow tree had gained more than 80 kilograms of weight while the soil had lost only 100 grams, prompting Helmont to develop the idea that water was the raw material for building plant bodies. But at that time he did not take into account the role of air.

Except for a small part of the water absorbed by plants from the soil by their roots, most of them are lost to the atmosphere through transpiration. For example, a corn plant needs more than 200 kg of water in its lifetime from seedling to fruit, and the use of this 200 kg of water is as follows.

1872 grams of water as a constituent, 250 grams of water for maintaining physiological processes, 202106 grams of water consumed by transpiration, 204228 grams of total water consumption during the growth period.

It can be seen that only about 1 of the water inhaled by the plant body is really used for various life activities and retained in the plant body; 99 or so the water was transpired away.

I think it is photosynthesis, the photosynthesis of plants produces starch, which is the main reason for plant weight gain, and the absorption is only to absorb the mineral elements in the ground to provide the necessary elements for the life activities of plants.

Photosynthesis. After that, there is the production of carbohydrate organics, which increases its weight.

Plant in a semi-shaded place indoors, avoid direct sunlight, and avoid dry, high-temperature environments. The minimum temperature in winter is maintained above 8. Watering to ensure that the potting soil is moist, watering once a week, and attention should be paid to improving air humidity.

Spray water around the plant frequently, and the air humidity is above 70% to grow well.

The main reason for the increase in plant weight is the absorption of carbon dioxide and water by the photosynthesis of plants, as well as the absorption of various elements in the soil.

water, mineral elements, and air. Take cucumber seedlings as an example, the root system of cucumber seedlings absorbs water and mineral elements from the soil, and the leaves use light energy to photosynthesize, absorb carbon dioxide in the air, and convert to produce organic matter such as sugars, so as to increase the quality of seedlings.

More than 99% of the water absorbed by the roots of green plants is emitted into the atmosphere from the stomata of the leaves in the form of water vapor through transpiration, and only about 1% is used by plants for the construction of cells and raw materials for photosynthesis Photosynthesis is a process in which green plants synthesize carbon dioxide and water into organic matter, release oxygen, and at the same time convert light energy into chemical energy and store it in synthetic organic matter As can be seen from the title, a willow tree weighing about kilograms is cultivated in fertile soil, Two years later, Shiwei was dug up by the roots and weighed 11 kilograms after dehydration, and the weight of more than 10 kilograms increased was mainly due to the weight of organic matter produced by the willow tree through photosynthesis, which is made of carbon dioxide in the atmosphere and water in the soil

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