دورية أكاديمية
Estimating Leaf Area Index (LAI) in Vineyards Using the PocketLAI Smart-App
| العنوان: | Estimating Leaf Area Index (LAI) in Vineyards Using the PocketLAI Smart-App |
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| المؤلفون: | Francesca Orlando, Ermes Movedi, Davide Coduto, Simone Parisi, Lucio Brancadoro, Valentina Pagani, Tommaso Guarneri, Roberto Confalonieri |
| المصدر: | Sensors, Vol 16, Iss 12, p 2004 (2016) |
| بيانات النشر: | MDPI AG, 2016. |
| سنة النشر: | 2016 |
| المجموعة: | LCC:Chemical technology |
| مصطلحات موضوعية: | hemispherical photography, leaf area index, plant vigour, smart-app, Vitis vinifera, Chemical technology, TP1-1185 |
| الوصف: | Estimating leaf area index (LAI) of Vitis vinifera using indirect methods involves some critical issues, related to its discontinuous and non-homogeneous canopy. This study evaluates the smart app PocketLAI and hemispherical photography in vineyards against destructive LAI measurements. Data were collected during six surveys in an experimental site characterized by a high level of heterogeneity among plants, allowing us to explore a wide range of LAI values. During the last survey, the possibility to combine remote sensing data and in-situ PocketLAI estimates (smart scouting) was evaluated. Results showed a good agreement between PocketLAI data and direct measurements, especially for LAI ranging from 0.13 to 1.41 (R2 = 0.94, RRMSE = 17.27%), whereas the accuracy decreased when an outlying value (vineyard LAI = 2.84) was included (R2 = 0.77, RRMSE = 43.00%), due to the saturation effect in case of very dense canopies arising from lack of green pruning. The hemispherical photography showed very high values of R2, even in presence of the outlying value (R2 = 0.94), although it showed a marked and quite constant overestimation error (RRMSE = 99.46%), suggesting the need to introduce a correction factor specific for vineyards. During the smart scouting, PocketLAI showed its reliability to monitor the spatial-temporal variability of vine vigor in cordon-trained systems, and showed a potential for a wide range of applications, also in combination with remote sensing. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1424-8220 41416589 |
| Relation: | http://www.mdpi.com/1424-8220/16/12/2004; https://doaj.org/toc/1424-8220 |
| DOI: | 10.3390/s16122004 |
| URL الوصول: | https://doaj.org/article/ef46d2c05a41416589717435337ecf34 |
| رقم الأكسشن: | edsdoj.f46d2c05a41416589717435337ecf34 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 14248220 41416589 |
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| DOI: | 10.3390/s16122004 |