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基于高斯曲率最大化的蓝莓温室光照与CO2综合调控策略

花匠小妙招
2024-09-19 08:21

基金项目:

上海市科委创新行动计划项目（17391900900）和国家自然科学基金项目(61973337)

Integrated Control Strategy of Light and CO2 in Blueberry Greenhouse Based on Maximizing Gaussian Curvature

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摘要:

针对目前温室光照、CO2调控效益不高等问题，提出了一种基于高斯曲率最大化的蓝莓温室光照和CO2综合调控策略。首先通过采集不同温度、光照强度、CO2浓度嵌套下的蓝莓净光合速率，建立不同温度下包含光照强度、CO2浓度的蓝莓净光合速率机理模型；接着根据不同温度下蓝莓光合速率机理模型的高斯曲率函数构造适应度函数，并采用粒子群算法进行最大值寻优，计算高斯曲率最大值所对应的光照强度和CO2浓度，获得不同温度下光照强度、CO2浓度高斯曲率最大点；最后基于多项式拟合，建立不同温度下光照、CO2综合调控策略。通过与最大净光合速率饱和点的调控对比发现，平均光照强度下降60.73%，CO2浓度下降25.00%，而平均净光合速率仅下降14.29%。与实际蓝莓净光合速率对比发现，采用本文提出的光照、CO2综合调控策略，蓝莓净光合速率较实际值平均提高1.87倍以上。说明本文提出的光照、CO2综合调控策略具有综合效益高等特点，可为温室光照、CO2调控提供理论支撑。

Abstract:

Photosynthesis directly affects the quality and yield of blueberries, and the photosynthetic rate of crops is mainly affected by temperature, light and CO2. At present, the control of light and CO2 is mainly based on the saturation point of photosynthesis rate, and the control and control efficiency is low. Aiming at the current problems of greenhouse light and CO2 control efficiency, a comprehensive control strategy of blueberry greenhouse light and CO2 based on the maximization of Gaussian curvature was proposed. Firstly, by collecting the blueberry net photosynthetic rate under different temperatures, light, and CO2 nesting, a blueberry net photosynthetic rate mechanism model was established, including light intensity and CO2 concentration at different temperatures;then according to the Gaussian curvature function of the blueberry photosynthetic rate mechanism model at different temperatures, the fitness function was constructed, and the particle swarm algorithm was used to optimize the maximum value, the light intensity and CO2 concentration corresponding to the maximum Gaussian curvature were calculated, and the maximum point of light and CO2 Gaussian curvature at different temperatures were obtained;finally, based on polynomial fitting, different comprehensive control strategy of light and CO2 was established at different temperatures. By comparing with the control of the saturation point of the maximum net photosynthetic rate, it was found that the average light intensity was decreased by 60.73%, the CO2 concentration was decreased by 25.00%, and the average net photosynthetic rate was only decreased by 14.29%. Compared with the actual blueberry net photosynthetic rate, it was found that using the proposed comprehensive control strategy of light and CO2, the blueberry net photosynthetic rate was increased by more than 1.87 times on average compared with the actual value. It showed that the proposed comprehensive regulation strategy of illumination and CO2 had the characteristics of high comprehensive benefit, and it can provide theoretical support for the regulation of illumination and CO2 in greenhouse.

引用本文

徐立鸿,刘辉辉,蔚瑞华.基于高斯曲率最大化的蓝莓温室光照与CO2综合调控策略[J].农业机械学报,2022,53(7):354-362. XU Lihong, LIU Huihui, WEI Ruihua. Integrated Control Strategy of Light and CO2 in Blueberry Greenhouse Based on Maximizing Gaussian Curvature[J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(7):354-362.

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