PDF
Full
Outline
In order to clarify the impact of coupling canopy morphology with other modal information on estimating winter wheat leaf chlorophyll content (LCC), two wheat varieties, Shinong 086 and Hemai 2020 were used as materials. Four nitrogen application levels (0, 120, 240, and 360 kg·hm-2) were set up in fields. This study used a low-altitude unmanned aerial vehicle (UAV) remote sensing platform equipped with a multispectral camera to obtain spectral data of winter wheat at key growth stages. The canopy morphology effect was calculated in combination with the digital elevation model (DEM), and Random Forest Regression (RF), Categorical Boosting (Catboost), and eXtreme Gradient Boosting (XGBoost) were applied to analyze the contribution of spectral information, index information, and canopy morphology information, among other multi-modal data, to the monitoring of LCC in winter wheat. The results showed that compared with spectral and vegetation index features, canopy morphology could improve the monitoring accuracy of LCC (r2=0.66), and the importance of DEM was superior to that of slope. Among the three machine learning algorithms, the LCC model constructed by Catboost could achieve high monitoring accuracy both in the case of single feature and multi-source feature coupling, especially when a single canopy morphology feature was used as the input variable. Multi-source feature coupling does not improve the monitoring accuracy of LCC, but the coupling of other features with canopy morphology features can improve the monitoring accuracy to a certain extent.
PDF
22
6
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
