Currently, Japan, the Netherlands, USA, Canada, China … there are many “plant factory”. They use hydroponics technology and LED lighting has created large quantities of pure green vegetables. Production efficiency is hundreds of times higher than the outdoor plantation. These are high technologies for modern agriculture, controlling all the factors that affect plants such as light, temperature, humidity, air, microorganisms, even dust. In recent years our country has promoted this kind of development. However, many houses can not be planted due to lack of light by many high buildings. Light can be considered as the greatest challenge in cultivation. Meanwhile, LEDs have outstanding advantages. It is the best led grow light reviews. The biggest advantage of LEDs is that they can select the spectral level suitable for plant growth and development. This helps to maximize crop yields and improve the quality of agricultural products. Growing vegetables in the house using hydroponic method (without soil) and using LEDs (replacing sunlight) is a new farming model that has many benefits such as saving space, shortening growing time. Besides, It controls the environment well so it produces higher productivity and stability. Product quality is better and more homogenous than outdoor planting.
Some research evidence when growing vegetables using the first LEDs
To assess the effect of new lights on the growth of vegetables, experiments were conducted. Some primary basis show:
1. Vegetable sprouts:
Experiment 1: (26/10 – 02/11/2014): Productivity of vegetable sprouts including white cabbage, red cabbage, sunflower and water spinach, harvested 6 days after sowing, using 1 set of LED NCM01 30W. White and red radish sprouts yield 4.22-4.58 kg / m2, higher than sunflower yield and water spinach under the same conditions of planting and care.
– Experiment 2: (11-16 / 01/2015): Using a set of NCM01 LEDs for the total yield of sprouts from 5.35-6.65 kg / m2. Compared to using 2 sets of 16W LEDs and non-irradiated (room lighting) from 4.92-5.02 kg / m2.
Through two experiments on vegetable sprouts, using an NCM01 LED set for the highest yield of sprouts.
2. Baby vegetables:
The crop yield (harvested 17 days after sowing) utilized the highest two sets of NCM01 LEDs (2.31 and 2.24 kg / m2 respectively of gross and commercial yields), using two low 16W LED. Control formula (room lighting) of the tree died completely at 10 days after sowing. The baby vegetable experiment , which lasts longer than the 11-day sprout, should light up two NCM 01 LEDs for high productivity. Planting sprouts should use LED light.
3. Leafy vegetables:
LED lighting time is 24/24 hours, for trees of the largest size, followed by 18/24 illumination, lower at lower illumination times and lowest at 6/24 hours (almost no growth, only survival).
Experimental leafy vegetables with lettuce, the time of daylighting with different intensity of light and spectra influenced the growth of leaf height and number of plants.
4. Growing plants and vegetables without soil and sunlight can completely become a reality:
With initial foundations, there is a need for serious projects to develop LEDs for vegetable sprouts. If there is a close collaboration between domestic LED manufacturers and biological scientists, we can confidently provide a viable crop solution in Vietnam when people is tending to increase rapidly. Scientists continue to study LED radiation and research on the use of light sources with appropriate light spectrum and lighting time for optimal growth and development to improve the cultivation of some valuable vegetables by hydroponic method. This method helps to save water, nutrients, shorten the growth time, increase productivity, quality, food safety (without washing before eating), not cause the environment pollution and produce all year round . Many scientists are working on the project “Growing vegetables without soil, and sunlight” for households and production facilities in urban areas throughout the country, as well as transfer technology in place. Hopefully, the dream comes true.