1. Watering Method: Plants grown in soil are determined by the weather conditions and the environment in which the plants are placed. Usually watering is carried out once every three days. The roots of hydroponic plants must be disinfected, otherwise the roots and hair will rot. losses are likely to occur. If there is an odor, the water should be changed approximately every ten days.
2. Environmental aspects: When plants grown in soil grow normally and the moisture supply of the soil is normal, the humidity of the air around the plants increases considerably. Do not accumulate moisture at the bottom of the flowerpot, otherwise mosquitoes will easily breed; hydroponic plants need to change the water once a week, otherwise they will easily breed mosquitoes in time. plants.
3. Fertilization method: plants grown insoil mainly add granular fertilizers, which dissolve slowly and are absorbed slowly; hydroponic plants only need to add liquid fertilizer, which dissolves quickly and is absorbed quickly; .
4. Ornamental effect: When watering soil-grown plants, it is easy for water and soil to overflow from the plant pots and dirty the ground. Clean the flower pots and the floor. regularly at the bottom of flower pots; hydroponic plants are suitable for growing in glass bottled water, which is crystal clear. The plants will gradually enter the water and grow aquatic roots.
The difference between photosynthesis and respiration
The difference between the two lies in their different properties, environment and fertilization methods. Vegetables grown with water are better because they do not pollute.
1. Different pProperties: Most hydroponic vegetable roots grow in layers of growing fluid, and only the growing fluid provides them with moisture and nutrients. Soil cultivation is a test of potted plants that use the soil layer as plant growth material.
2. The environment is different: plants grown in soil grow under normal circumstances and the moisture content of the soil causes a significant increase in the relative humidity of the environment surrounding the plants. Be careful not to store water at the bottom of the potted flower pot, otherwise it will easily attract mosquitoes. Hydroponic plants need to change the water once a week, otherwise they will easily breed mosquitoes. Prune away rotten roots as soon as possible. This can significantly increase the relative humidity of the environment around the plants.
3. The fertilization methods are different: aGranular fertilizer is added to plants grown in soil, and the fertilizer slowly decomposes and is absorbed slowly. Simply add liquid fertilizer to hydroponic plants. The fertilizer decomposes quickly and is quickly absorbed.
The hydroponic nutrient solution is regularly formulated according to the nutritional needs of vegetables under natural growing conditions. It can provide nutrients for vegetable growth more precisely, correctly and efficiently. The liquid meets the growing needs of vegetables. plants and does not cause nutritional deficiencies.
Plus, whether grown in soil or hydroponically, vegetables absorb all the same organic ions as nutrients. Even organic fertilizers must be converted to ionic forms before they can be absorbed by vegetables. So don't worry about the supply of chemical fertilizers for hydropo vegetablesniques.
Vegetables grown hydroponically do not present the problems of pollution by pesticides and heavy metals in the soil. It can be said that hydroponics facilitates the production and processing of vegetables without pollution, and the products have a higher safety factor. Hydroponic vegetables have very low nitrate content, so they are safer. A large number of studies have shown that nitrate is harmful to the body in vegetables and that the nitrate and nitrite components of vegetables are interfered with for many reasons.
In nature, nitrate must be restored before it can be produced using microorganisms. Because the hydroponic growing medium is constantly circulating, the dissolved oxygen in the growing medium is always at a high level. level, that is, the redox potential in the culture medium is high and there is no way to restore nitrate to nitrate. ParkTherefore, it is almost impossible for vegetables to grow in a hydroponic growing medium. There is no nitrate available for adsorption. The nitrate content of hydroponic vegetables is extremely low.
What are the differences between water and air?
1. The difference between photosynthesis and respiration in plants:
Photosynthesis occurs when plants absorb solar energy through chloroplasts and convert carbon dioxide and l water into organic matter. .And convert solar energy into bioenergy and store it in organic matter.
Respiration is the process used by plants to break down organic matter in mitochondria and release the energy needed for plant growth. The process is opposite to photosynthesis.
2. The place of photosynthesis: chloroplasts in plant cells
Conditions for photosynthesis: light
The raw materials of photosynthesis: water, carbon dioxide
The results of photosynthesis: sugars and other organic materials; >
Energy changes in photosynthesis: light energy is converted into chemical energy
3. The location of respiration: mitochondria animals and plants; cells
Conditions for respiration: enzymes
Raw materials for respiration: sugars and other organic materials, oxygen; /p>
The production of respiration: carbon dioxide, water, a large amount of energy
The change of energy breathing: stable; chemical energy is converted into active chemical energy.
What are the differences between xerophytes and aquatic plants?
1. The similarities between water and air are as follows : they flow, have no fixed shape, are transparent, colorless, odorless, have weight and take up space.
2. The differences between water and air are:
1. Water is heavier than air and air is lighter than water.
2. Water can be affected, but not air.
3. Water is visible, but air is invisible.
4. Water is a liquid and air is a gas.
5. When water occupies space, its volume does not change. When air occupies space, its volume changes (compresses or expands).
Detailed information:
For humans, water is the most important substance after oxygen. In the adult body, 60 to 70% of its mass is made up of water. Loss of 10% of water in the body threatens health, and loss of 20% of water endangers life. This shows the importance of water for life.
2. The role of air:
Air is a necessary condition for the survival of animals and plants on earth. Animal respiration and plant photosynthesis are inseparable from air; doing things on land Temperatures remain relatively stable, and without an atmosphere, temperatures would be high during the day and low at night.
The ozone layer can absorb the sun's ultraviolet rays and protect life on earth from damage; atmosphere can prevent high-energy particles from space from penetrating too much into theearth and prevent meteorites from hitting the earth, because when meteorites rub against the atmosphere, they can slow down and burn.
The formation of wind, clouds, rain and snow is inseparable from the atmosphere; sound propagation requires the use of air; parachutes and airplanes also use air power; compressed air operation.
1. Different leaf areas
Xerophytes: The proportion of leaf area of xerophytes decreases.
Aquatic plants: Aquatic plants generally have an increased leaf area.
2. Different epidermis
Xerophytes: Xerophytes often have dense epidermal hairs or white wax.
Aquatic plants: Aquatic plants have poorly developed epidermis or in some cases almost no epidermis.
3. Different stomatal densities
Xerophytes: The stomatal density of xerophytes increasese, which increases gas exchange and improves the efficiency of photosynthesis.
Aquatic plants: There are no stomata on the epidermis of leaves of aquatic plants submerged in water.
4. Different Leaf Shapes
Xerophytes: The leaves of xerophytes are mostly grass-like, and the total leaf area is larger than that of many dicotyledonous plants.
Aquatic plants: The leaves of aquatic plants in water often divide into ribbons or filaments to increase the area of absorption of light, carbon dioxide and inorganic salts.
Baidu Encyclopedia - Xerophytes
Baidu Encyclopedia - Aquatic plants