文献类型： 外文期刊

作者： Wang, Jingyun ¹ ; Hu, Xiaohang ¹ ; Dong, Xinjiu ² ; Liu, Shuo ¹ ; Li, Yanli ¹ ;

作者机构： 1.Heilongjiang Univ, Coll Modern Agr & Ecol, Harbin 150008, Heilongjiang, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Cash Crops, Urumqi 830000, Peoples R China

关键词： Sugar beet; Unmanned aerial vehicle; Multisource remote sensing data; Multi-temporal; Predictive modeling

期刊名称：SUGAR TECH （ 影响因子：2.0； 五年影响因子：2.0 ）

ISSN： 0972-1525

年卷期： 2025 年 27 卷 4 期

页码：

收录情况： SCI

摘要： This study aimed to explore the potential of multisource and multi-temporal UAV remote sensing data for sugar yield estimation and to investigate the relationship between different remote sensing features and nitrogen accumulation at various growth stages. UAV hyperspectral images, RGB images, and light detection and ranging (LiDAR) data were collected at different growth stages, and a comprehensive set of spectral, structural, and textural features reflecting the sugar beet canopy were extracted. Three machine learning algorithms, including multiple linear regression (MLR), random forest (RF), and support vector machine (SVM), were used to construct prediction models for nitrogen accumulation and sugar yield. The results showed the following. LiDAR features and textural features that characterize the canopy structure of sugar beet are essential for reflecting nitrogen accumulation, and LiDAR features play a key role in sugar yield prediction. For nitrogen accumulation prediction, the MLR model performed best during the rapid foliage growth period (R2 = 0.70, RMSE = 0.44 ). For sugar yield prediction, the MLR model, when combined with multi-temporal data, achieved the highest accuracy (R2 = 0.95, RMSE = 0.16), which was 21% higher than the best single-phase prediction result (sugar accumulation stage). The collaborative use of multisource remote sensing data significantly improved accuracy compared to single data sources, with nitrogen estimation accuracy increasing by 55% and sugar yield estimation accuracy increasing by 28%. These findings indicate that multisource remote sensing data can be used to diagnose nitrogen nutrition and predict sugar yield in sugar beet.