The invention provides a method and a
system for evaluating influence of low-illumination stress on the quality of
greenhouse tomatoes. The method comprises the following steps: collecting
air temperature and
photosynthetically active radiation information in a
sunlight greenhouse under preset conditions; calculating a
heat effect, a
radiation effect, a temperature-light effect and an accumulated temperature-light effect of the
sunlight greenhouse tomatoes in the flowering and fruit period in each day by combining the upper limit temperature and the
lower limit temperature required by the growth and development of the
sunlight greenhouse tomatoes in the flowering and fruit period; and calculating a difference value between the CK and the accumulated temperature-light effect between the different low-illumination treatment, calculating a difference value between the CK and the tomato
nutritional quality index between the different low-illumination treatment, establishing a dynamic relationship between the accumulated temperature-light effect difference value and the
nutritional quality index difference value, and simulating the dynamic influence of the low-illumination stress on the tomato
nutritional quality index. According to the method, the advantages of the heat
radiation product
algorithm are used for reference, the photosynthetic active
radiation in the original heat radiation product index is replaced by the light effect by using the temperature-light effect
algorithm, the evaluation effect is improved, and the influence of the
light stress on the tomato nutritional quality index can be evaluated more accurately.