Key technologies for high-efficiency, low-energy LED smart plant factories and

According to Reuters a few days ago in the 2017 annual National Science and Technology Awards Conference held in Beijing's Great Hall. The results of the 2017 National Science and Technology Awards were announced. The key technology and system integration of high-efficiency low-energy LED intelligent plant factory led by researcher Yang Qichang from the Institute of Agricultural Environment and Sustainable Development won the second prize of National Science and Technology Progress Award.

Researcher Yang Qichang led the team to propose the concept of plant "light formula" and clarify its theoretical basis, and created LED energy-saving light source based on light formula and its light environment control technology. Based on the response characteristics of plant photosynthesis to different spectra, the concept of plant “light formula” was first proposed, and the light formula optimization parameters of typical crops at different growth stages were constructed. Created a light-based red light (660nm) and blue light (450nm) chip combination, blue chip and phosphor excited multi-spectral combination (R / G / B / FR) LED energy-saving light source; developed based on plant development characteristics The mobile LED light source and its light environment control technology significantly reduce the energy consumption of the light source and achieve energy saving of 50.9%.

For the first time, the light-temperature coupling energy-saving temperature regulation method of plant factory was proposed, and the energy-saving regulation technology based on the coordinated temperature regulation of outdoor cold source and air conditioner was invented. Based on the fact that outdoor outdoor air contains cold source and high energy consumption during light period air conditioning, the “light-temperature coupled energy-saving thermostat” method, which puts the light period at night and introduces outdoor natural cold source cooling, is proposed for the first time. The energy-saving environmental control technology and equipment of the plant factory, which is coordinated with the air conditioner and the air conditioner, significantly reduces the energy consumption of the air conditioner. Compared with the traditional air conditioner cooling, the energy saving rate is 24.6-63.0%.

Invented the synergistic treatment technology of UV-nano-TiO2 nutrient solution and the method of improving the quality of vegetables by short-term continuous illumination before harvesting, and developed a technology for improving the quality of vegetables based on coordinated light-nutrition regulation. Invented the technical method of UV-nano-TiO2 synergistic treatment of self-toxic substances in nutrient solution, and proposed the new technology of short-term continuous illumination to control vegetable quality before harvesting, and proved the optimization parameters and regulation strategies of light environment to improve vegetable quality, and reduced nitric acid in leafy vegetables. The salt content is over 30%, and the Vc and soluble sugar content are significantly increased.

Developed an environment-enhanced multi-factor synergy technology for plant plant efficacy, energy efficiency and nutritional quality, and integrated three series of intelligent LED plant factory products. The logic control strategy and algorithm based on multi-factor coordinated control such as light formula, light-temperature coupling and nutritional quality improvement were proved, and the intelligent control technology of plant factory based on Internet of Things was developed to realize the temperature, humidity and illumination of plant factories. Online detection, remote access, program update and networked intelligent control of CO2 concentration and nutrient solution EC, pH, DO and other factors. The integration created three series of intelligent LED plant factory complete sets of technical products: mass production, mobile, home micro-plant factory.

The results were granted 86 patents, including 42 invention patents (4 international invention patents in the US), 112 papers published (including 38 articles by SCI and EI), 5 monographs published, and a large-scale production and mobile type. , family micro plant factory and other products.

In June 2016, “Intelligent LED Plant Factory Technology”, as a representative of major scientific and technological achievements in the agricultural field, participated in the National “Twelfth Five-Year” Science and Technology Innovation Achievement Exhibition and was widely praised by all sectors of society. It was praised as “the subversive nature of land use and farming methods”. technology".

Professor of the world famous plant factory, chairman of the Japan Plant Factory Society, and former president of Chiba University in Japan, Professor Feng Shu gave a high evaluation of the project results: "Chinese Academy of Agricultural Sciences plant factory technology in light formula and LED light source, light-temperature Research on coupled energy-saving environmental control is at the international advanced level."

Editor: Yan Zhixiang