The method of cultivation is being applied by some gardeners on vegetables, roots and fruits in Dalat (Lam Dong). Compared with hydroponic cultivation, this method is evaluated for higher economic efficiency.

The basic principle of a gas system is to spray a nutrient-rich mist directly on roots or bulbs

Mr. Tran Huy Duong, owner of Langbiang Farm (Xo Viet Nghe Tinh street, ward 7, Da Lat) successfully grows many kinds of vegetables by gas cultivation method. Mr. Duong has cultivated nearly 10 kinds of vegetables such as lotus, kale, spicy, celery, strawberry, spinach, spinach...

Firstly, vegetable seeds are added to the coconut fiber to make the seedlings, then put the pellets into plastic containers (4cm in diameter and 5cm in height) and place them on the plastic plates used to make them. The lid to cover the trough farming. Each trough width of 1.5m, 8m long, is installed to isolate the ground about 1m. The trough is covered, which contains nutrient-absorbing air to feed the roots.

The process of care is carried out by modern machinery equipment (pumps, nutrient basins, nutrition pipelines ...) and is programmed in detail in the computer. Every few minutes, the irrigation system will automatically spray; spraying time and number of sprayings per day are adjusted appropriately depending on the age, physiological status of plants and the temperature of the external environment. If the plant does not absorb all spray solution, it can be recovered, filtered and supplemented for next use, so it can reduce 70-80% of cost of water, fertilizer...

According to Tang, farming methods do not use land as agricultural land and also do not dip the root in the solution as hydroponic but grown in air containing nutrient dust. In other words, water-based fogs moisturize the roots to grow vegetables.

Vegetable seeds were added to the coconut fiber to seedlings and then pelleted into a 4cm diameter plastic cage, approximately 5cm high.

In order to prove, Mr. Tang opened the lid of a trough, exposing the bunches of frangipani leaves hanging in the air. A week after planting, the roots grow into clusters in the trough. Above the trough, the stem and leaves extend about a hand. According to the time of the tree's growth, Mr. Tang installed the spray mist in the air to make it suitable for growing roots and then draining them into the leaves and stalks.

With this method of cultivation, many vegetables can not be cultivated hydroponic as spinach, strawberries are now perfectly fit. On the other hand, the previous method of hydroponic problem is that the pathogenic bacteria in the roots are easily spread throughout the orchard because the entire root of the orchard is embedded in the return solution. As with the gas, the roots are separated from each other in the air so it is difficult for bacteria to access many trees at once. Due to the spray of nutrients in the form of fog, it is almost impossible to spread bacteria from plant to plant such as hydroponic; When the disease occurs, just remove the diseased plants.

Actual production at Langbiang Farm shows that the application of gas cultivation method increased productivity 2 times; Cultivated area can be saved because of intensive multi-storey farming. The plant grows 1.5 times faster by living in an artificial environment. The cyanobacterium grows in virtual time with a 24-hour day illuminated by electric light, equivalent to 3 days with 8 hours of natural light; save irrigation water, not dependent on nature, especially the dry weather, drought; saving time and time, especially without soil improvement.

On average, a batch of aerated vegetable soup, care and harvest within 25 days. Due to being produced in the style of rolling, harvesting where to re-farm there so it can increase the crop year round. Each year the production of vegetable air increases over 2 litters and diversifies the type of vegetables superior to that of hydroponic. While the value of investment in equipment, the production of vegetables is lower than that of hydroponic cultivation by 5-10%.

Vegetables grown by the method of greenhouse cultivation grow well, quickly harvest

According to Mr. Tran Huy Duong, after cleaning up the gutters, inspecting the maintenance of the spray pipe, the water pump system from underground wells ..., within a year, Grocery store, provided to supermarkets with an average price of 25,000 VND/kg. With the yield of 400 tons/ha/year, the grower of vegetables can profit from 4 - 5 billion VND/ha.

Source: baomoi.com