It is said that vegetables grow in the water. Is it true?/You don't say.

Vegetables grow in water, which is actually hydroponic vegetables. In the past, in our limited knowledge, any plant grew in the soil, but we also know that everything can not be separated from water, and water and sunlight can not be separated from any kind of animals and plants. On the other hand, vegetables need more water because they have higher water content. In fact, hydroponic vegetables use the growth habits of some vegetables to add nutrient solution to the water, so that vegetables can absorb enough fat water to achieve the purpose of growth.

If we have been to some botanical gardens or vegetable gardens in Shouguang, we will have a basic understanding of hydroponic vegetables. In fact, hydroponic vegetable technology began to be used in some countries in the 1950s. In China, hydroponic vegetables began in 1980s, and are now widely promoted in some specialized cultivation.

Hydroponic vegetables are vegetables, that is to say, most of the roots grow in nutrient solution, and there is no traditional soil, only water, nutrients and oxygen are provided to them through nutrient solution. Hydroponic vegetables have a short growth cycle and are rich in essential vitamins and minerals. The water for hydroponic vegetables is actually a nutrient solution. These nutrients have the same composition in the soil, which is more accurate, more scientific and safer than the soil composition, so vegetables can achieve high quality, high taste and green safety. The production of hydroponic vegetables does not depend on soil, which avoids heavy metal pollution, soil-borne diseases and pests and continuous cropping obstacles. More importantly, it saves land resources and is of great benefit to improving the environment.

As for the types of hydroponic vegetables, leafy vegetables are the most common, and individual melons and fruits can also be hydroponic, such as cucumbers, melons and tomatoes. The most common hydroponic leafy vegetables are lettuce, spinach, rape, chicory, water spinach, fungus, spinach, leaf beet, watercress and so on. Of course, we ordinary people can also hydroponic garlic, green onions and so on. At home, you can eat and watch, and you don't need to cultivate nutrient solution specially.

The roots of hydroponic vegetables are mainly milky capillary roots, which adapt to the aquatic environment to absorb water and nutrients, and some aerial roots are used for oxygen absorption. The biggest characteristics of hydroponic plants are pollution-free and short growth cycle. Because they are all cultivated indoors, they are not limited by seasons, and the biggest difference from other seasonal vegetables is pollution-free. However, due to the lack of extensive training, people's understanding is poor. Although there are many supermarkets in big cities, they are relatively deserted. It is estimated that it will take time to get into the vegetables of ordinary people.