In recent years, a new soilless growing technique has attracted attention. Staff only need to water a sponge planted with plants, you can realize the planting.natural dish sponge This sponge is known as the "planting sponge", it is made of polymer foam material and a certain proportion of organic or inorganic material mixed foam and become. Through the chemical structure and three-dimensional network crosslinking system, planting sponge has chemical and physical stability. It has high open pore rate, lightweight material and more than 97% open pore rate. Under weak acid and alkali environments, the planting sponge will not age, decompose and has no residual free formaldehyde. In addition, planting sponge also has the characteristics of environmental degradation, can decompose plant growth elements and conducive to the growth of the root system, so it has been a basic alternative to soil.

It is understood that the planting sponge is not limited by the convenience of the site, not only can be placed on the ground, but also can be placed on the wall or roof for planting. It is one of the advanced cultivation modes in current agricultural production. The use of planting sponges to grow green pollution-free vegetables do not contain any pesticide residues, and their taste and nutrition than ordinary planting vegetables. The fertilizers used in the planting process are soil-less nutrient solution, which is characterized by cleanliness and hygiene. The project of planting sponge green pollution-free vegetables is not only suitable for factory mass production, but also suitable for urban residents to plant on their balconies.

In terms of cultivating seedlings, nutrient bowl seedling or artificial substrate soilless seedling can be used. As for aerosol cultivation, it is best to use aerosol seedling method, which is a soil-less seedling technology with the advantages of early sprouting, high rate of sprouting into seedlings, and rapid and robust seedling growth. The sprouted embryonic roots are placed in the nutrient fog, which can rapidly absorb nutrients and promote the extension of cotyledons and the emergence of true leaves. Moreover, the root system grows in the air without any friction resistance, and the root system is intact and undamaged when transplanted, so it is possible to realize the effect of transplanting without slowing down the seedling and without damaging the root system, and it is a true net-root seedling.

If you want to plant in water, the process is not as simple as planting vegetables in soil: first, take a piece of sponge with a thickness of 3cm or more, and then cut it into a crosshatch with a depth of about 1.5cm. Then bury the seeds in that 1.5cm and submerge the sponge in 1.5cm deep water. After a day or two, the seeds will germinate. After about a week, when the vegetable seedlings have grown to 4 leaves, you can wrap 4 to 5 seedlings in the growing sponge for transplanting into a hydroponic container. During the growing process, you need to pull out the weak seedlings and leave two or three healthy ones at the end. It is enough to change the water in the bucket every two or three days. Vegetables grown this way do not need to be sprayed with pesticides and are very green and environmentally friendly.

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