In recent years, plant factories have received unprecedented attention. According to the prediction of the United Nations, the global population will reach 9.5 billion by 2050, and human food demand will also increase by 70% -100% than it is now, while the per capita cultivated area has declined from 0.33hm2 to 0.22hm2 in the last 30 years, a decrease of 31.7%.
Among the many environmental factors affecting plant growth, light is one of the most important factors. The so-called "all things grow by the sun", the requirements of plants for light are mainly light color, spectrum, light intensity and light time. Therefore, by artificially developing the illumination of specific spectrum lighting products, plant growth can be greatly improved.
It is understood that electricity costs account for about 30% of the production costs of plant factories. Without cheap power supplies and high-efficiency artificial lighting to reduce production costs, plant factories are not very attractive to farmers. Therefore, the development of resource-saving light sources is a necessary requirement for the construction of plant factories.
In addition, in recent years, with the improvement of agricultural productivity, greenhouses have developed rapidly. Traditional greenhouses generally use ordinary electric light sources to supplement lighting and apply different covering materials and other agricultural technical measures. These measures have different levels of problems: the lack of specific spectrum The analysis of the components leads to impure light quality treatment, inconsistent light intensity, lower than the plant light compensation point, and low energy efficiency of the light source. The plant growth lamps successively developed in developed countries such as Japan, the United States, and the Netherlands are mainly based on LED light sources, but the upstream technology and core patents of LED lighting products are monopolized by large foreign companies, causing the current cost of LED plant lighting products on the market to be too high. , Technical monopoly, manual operation switch, difficult to promote and popularize.
