Building and application of optimization and regulation model of facility carbon dioxide target value of fusion efficiency constraint

Abstract

The invention provides a building method of an optimization and regulation model of a facility CO2 target value of fusion efficiency aiming at the problem that the production efficiency is low since amulti-factor coupling CO2 target value regulation model of a facility environment regulation system is lack of research and fusion regulation efficiency. Through a multi-factor coupling embedding test with illumination strength, the environment temperature and the CO2 concentration being variables, a photosynthesis data sample of tomato seedlings is obtained, a CO2 response right angle double-curve correction model is built, through a curve curvature theory, a CO2 limiting upper limit CO2 value at different temperatures and different light intensities is obtained, and with the CO2 limiting upper limit CO2 value being a regulation target value, fitting is conducted to obtain a tomato seedling CO2 environment regulation model of the fusion efficiency constraint at different temperatures anddifferent light intensities. By means of the model, compared with a traditional model with the maximum photosynthesis speed point being the regulation target value, the photosynthesis speed is lowered by only 7.27% on average, the needed CO2 amount is lowered by 37.55% on average, the basic theoretical problem of efficient facility crop environment regulation can be solved, and the model has guidance significance on actual facility environment factor regulation.

Description

technical field [0001] The invention belongs to the technical field of intelligent agriculture, and in particular relates to the construction and application of an optimal control model for facility carbon dioxide target value integrated with efficiency constraints. Background technique [0002] Tomato is one of the main crops cultivated in greenhouses in the world, and the photosynthetic rate directly affects the yield and quality of tomato. CO 2 It is the main raw material for the accumulation of photosynthetic substances in plants. It plays a very important role in regulating the growth and development of crops. It is one of the indispensable factors in the process of plant growth. It is vividly called "air fertilizer". Excessively high levels have an important impact on the growth rate, yield and quality of crops. If CO 2 Insufficient supply can directly affect the photosynthetic effect, causing problems such as flower and fruit shedding, sugar content decrease, growt...

AI Technical Summary

Problems solved by technology

while CO 2 The saturation point appears in the slowly rising interval of the curve, CO 2 It is no longer the main factor affecting the change of photosynthetic rate, but the main method of the above research uses CO 2 CO supplementation at saturation point 2 , without considering the CO 2 limit cap CO 2 The point is the control target value, although it can reach the maximum photosynthetic rate, but due to CO 2 The utilization rate is extremely reduced, resulting in the supplementation of CO 2 Significantly lower efficiency

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