数字农科院2.0

Assessment of salt tolerance in peas using machine learning and multi-sensor data

文献类型： 外文期刊

作者： Zehao Liu;Qiyan Jiang;Yishan Ji;Rong Liu;Hongquan Liu;Xiuxiu Ya;Zhenxing Liu;Zhirui Wang;Xiuliang Jin;Tao Yang

作者机构：

关键词： Peas;Saline-alkali region;Sensors;Unmanned aerial vehicle

期刊名称： Plant Stress

ISSN： 2667-064X

年卷期： 2025 年 17 卷

页码：

收录情况： ESCI（2025版）

摘要： Salt-alkali region spans vast areas and holds significant potential for agricultural development. Screening for salt-tolerant crop varieties is a critical strategy to enhance and utilize such region. Among edible legume crops, the peas are notable for their short growing period and moderate salt tolerance, making them a promising candidate for cultivation in salt-alkali conditions. Accurate and efficient screening of salt-tolerant pea varieties is essential for improving these regions. However, traditional screening methods are often time-consuming, labor-intensive, and prone to human error. Recent advancements in Unmanned aerial vehicle (UAV) and sensor technologies have enabled high-throughput screening of salt-tolerant crops, offering a more efficient alternative. In this study, UAVs equipped with red-green-blue (RGB) and multispectral (MS) sensors were deployed to capture images of peas grown in both normal and salt-treated plots. Structural traits (pH and canopy coverage [CC]), texture features, and spectral data were extracted from these images. Using this information, aboveground biomass (AGB) and Soil Plant Analyses Development (SPAD) values were estimated under both growth conditions using four machine learning algorithms: CatBoost, Light Gradient Boosting Machine (LightGBM), support vector machines (SVM), and random forest regression (RF). To asses salt tolerance, pea salt tolerance score (PSTS) was developed based on four indicators—plant height (PH), CC, AGB, and SPAD values. The score was then compared with ground-based measurements to validate its accuracy. The results show that: 1) multi-source data fusion significantly improved the accuracy of AGB and SPAD estimation; 2) the CatBoost algorithm achieved the highest performance for AGB estimation (R² = 0.70, RMSE = 1.59 t/hm2, NRMSE = 13.94 %), while the LightGBM algorithm performed best for SPAD estimation (R² = 0.60, RMSE = 2.33, NRMSE = 14.53 %); and 3) The PSTS established based on the optimal estimation data exhibits a strong consistency with the ground-measured data. In conclusion, integrating multi-sensor data and with advanced machine learning techniques provides a feasible and reliable approach for screening salt-tolerant pea varieties, paving the way for better utilization of salt-alkali region.

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