Plant low-temperature damage evaluation and early warning system based on cumulative air temperature deficiency

Abstract

The invention discloses a plant low-temperature damage evaluation and early warning system based on cumulative air temperature deficiency. The evaluation and early warning system is composed of a sensor, a displayer, a gateway and a control unit, and the evaluation basis of the evaluation and early warning system is the cumulative air temperature deficiency, The principle of taking the cumulative air temperature deficiency as the basis for judging the low-temperature damage degree of plants is that a low-temperature damage degree SI model is constructed by utilizing nine low-temperature damage indexes, namely Fv/Fm, chlorophyll a content, chlorophyll b content, total chlorophyll, FO/50us, Fk/300us, FJ/2ms, FI/30ms and Fm/maximum fluorescence, each physiological parameter is substituted into the model SI to calculate a score, the cumulative temperature deficiency corresponds to the low-temperature damage degree through the SI value, and the low-temperature damage degree is directly monitored and evaluated. According to the system, the low-temperature damage degree is evaluated according to the cumulative air temperature deficiency, whether plants are subjected to low-temperature damage or not is judged according to the temperature deficiency, the damage degree is monitored, the judgment accuracy is improved, the monitoring cost is reduced, and the technical effects of energy conservation and high efficiency are achieved.

Description

technical field [0001] The invention relates to the technical field of environmental control of horticultural facilities, in particular to a plant low temperature damage evaluation and early warning system based on accumulated air temperature deficit. Background technique [0002] Low temperature injury (chilling injury and freezing injury) refers to the temperature environment below the lower limit of the optimum growth temperature of plants, which is an important environmental limiting factor affecting plant growth and development. Low temperature stress will affect plant growth and development, photosynthetic metabolism, crop yield, quality, etc., resulting in reduced yield of horticultural crops such as vegetables, which has become an urgent problem to be solved in actual production. During the production of vegetables in solar greenhouses in winter and spring in northern my country, the daytime temperature in the facility is often lower than 20°C, and the temperature is...

AI Technical Summary

Problems solved by technology

When vegetable crops are in a low temperature environment, physiological activities will be disturbed, photosynthesis will be hindered, growth will slow down, and dry matter accumulation will decrease. Without effective early warning and preventive measures, it will eventually lead to a serious decline in yield and quality

[0003] The functions of the existing facility environment monitoring system mainly focus on the real-time monitoring of parameters such as temperature, light, substrate water content and air humidity, so as to monitor the gro