A Cucumber Photosynthetic Rate Prediction Model in Whole Growth Period with Time Parameters
文献类型: 外文期刊
第一作者: Wei, Zichao
作者: Wei, Zichao;Wan, Xiangbei;Lei, Wenye;Yuan, Kaikai;Lu, Miao;Li, Bin;Gao, Pan;Hu, Jin;Wei, Zichao;Wan, Xiangbei;Lei, Wenye;Lu, Miao;Gao, Pan;Hu, Jin;Wu, Huarui
作者机构:
关键词: cucumber; photosynthetic rate; SVR algorithm optimization; the whole growth period
期刊名称:AGRICULTURE-BASEL ( 影响因子:3.6; 五年影响因子:3.6 )
ISSN:
年卷期: 2023 年 13 卷 1 期
页码:
收录情况: SCI
摘要: Photosynthetic rate prediction models can provide guidance for crop photosynthetic process optimization, which has been widely used in the precise regulation of the protected environment. The photosynthetic capacity of crops continuously changes during their whole growth process. Previous studies on photosynthetic models mainly consider the interaction between a crop's photosynthetic rate and its outer environmental conditions and have been able to predict a crop's photosynthetic rate in a certain growth period. However, photosynthetic rate prediction models for whole growth periods have not been proposed yet. To solve this question, this paper introduces growing time into a variable set and proposes a method for building a cucumber photosynthetic rate prediction model of whole growth periods. First, the photosynthetic rate of cucumber leaves under different environmental conditions (light, temperature, and CO2 concentration) during the whole growth period was obtained through a multi-gradient nested test. With the environmental data and the cultivation time as the inputs, a photosynthetic rate prediction model was built using the Support Vector Regression algorithm. In order to obtain better modeling results, multiple kernel functions were used for pretraining, and the parameters of the Support Vector Regression algorithm were optimized based on multiple population genetic algorithms. Compared with a Back Propagation neural network and Non-linear Regression method, the Support Vector Regression model optimized had the highest accuracy, with the coefficient of determination of the test set was 0.998, and the average absolute error was 0.280 mu mol center dot m(-2)center dot s(-1), which provides a theoretical solution for the prediction of the cucumber photosynthetic rate during the whole growth period.
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