What are the key points of vegetable soilless cultivation techniques?

The common method of growing vegetables is to grow in open field or in greenhouse, both of which can not be separated from soil. With the development of planting technology, vegetable soilless cultivation is becoming more and more popular, which not only shortens the time on the market, reduces the planting cost, but also can obtain high yield. it is a planting mode with long-term benefit by one-time investment. What are the key points of vegetable soilless cultivation techniques?

What are the key points of vegetable soilless cultivation techniques?

1. Selection of planting substrate.

The substrate of vegetable soilless cultivation generally uses some inorganic granular objects such as gravel, slag and so on. Slag has the advantages of light physique, convenient transportation and good water retention. Sand and gravel have the advantages of easy cleaning and disinfection, but they are heavier and worse than slag. People decide which matrix to choose according to their own situation.

2. Cultivation bag

If vegetables are soilless, the cultivation bag is essential. After the substrate is filled in the cultivation bag, it is placed neatly to make a cultivation hole with a width of 90 to 120. Each hole grows three rows of vegetables, that is to say, each bag grows a row of vegetables, leaving a certain width of passage to facilitate the follow-up manual management work and the watering of nutrient solution.

3. Solution preparation

In order to make full use of the limited area and equipment, interplanting and intercropping of many kinds of vegetables can be carried out, which can improve the utilization rate of planting. During this period, nutrient solution must be configured to supply the growth and development of different vegetables.

4. Irrigation management

After soilless planting, there is no need to add fertilizer in the substrate, so it can be irrigated directly with the configured nutrient solution. Specific according to the plant size of growing vegetables, planting season to choose timing, quantitative irrigation of nutrient solution and so on. In the early stage of cultivation, the irrigation amount should be determined according to the growth of vegetable plants and air temperature. if the temperature is high and the plants grow fast, the demand for nutrient solution will also increase. Water it two or three times a day, and it's better to use a sprinkler to water the flowers. During this period, it is necessary to maintain the wettability of the substrate, do not overwater, otherwise it will be counterproductive to cause root hypoxia and damage the roots of vegetables.

Second, how to judge that the root system of soilless cultivation of vegetables is normal?

If the root system of vegetable soilless cultivation is very white, elastic, without discoloration, fracture and other phenomena, it means that the growth is healthy. If the root system is healthy, then vegetables can smoothly absorb nutrients such as water and fertilizer, and can grow smoothly. If the root system does not grow normally, blackening, yellowing, decay and other phenomena occur, then the stems and leaves, flowers and fruits on the ground will not grow well.

Compared with traditional soil planting methods, soilless cultivation can reduce various "risks" in nature, for example, soil-cultivated vegetables will face high temperature and flood disasters in nature, and the yield and quality of vegetables will be seriously affected.