Method and system for evaluating influence of low-illumination stress on quality of greenhouse tomatoes

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of tomato planting, in particular to a method and system for evaluating the influence of low light stress on the quality of greenhouse tomatoes. Background technique [0002] Tomato (Lycopersicon esculentum Mill.) is a typical temperature-loving and light-loving plant, and it is one of the main varieties of vegetable production in my country. The main energy source of energy-saving solar greenhouses in northern my country is solar radiation, and its safe production is closely related to meteorological conditions. With the warming of the climate and the intensification of air pollution, during the main production season of protected vegetables in the north, fog and haze frequently occur, and continuous rain (snow) occurs from time to time. Lack of sunshine disasters has become the most widespread agrometeorological disaster affecting protected agricultural production. [0003] The lack of light stress not on...

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Problems solved by technology

However, none of the above-mentioned methods disclosed the influence of low-light stress on the nutritional quality index of greenhouse tomato.

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