Academic Journal
Analysis of vineyard differential management zones and relation to vine development, grape maturity and quality
| العنوان: | Analysis of vineyard differential management zones and relation to vine development, grape maturity and quality |
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| المؤلفون: | Martínez Casasnovas, José Antonio, Agelet Fernández, J., Arnó Satorra, Jaume, Ramos Martín, Ma. C. (Ma. Concepción) |
| بيانات النشر: | Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya) |
| سنة النشر: | 2013 |
| المجموعة: | Universitat de Lleida: Repositori Obert UdL |
| مصطلحات موضوعية: | Cluster analysis, Differential management zones, Precision viticulture, Yield maps, Análisis de aglomerados, Mapas de cosecha, Vendimia selectiva, Viticultura de precisión, NDVI, Viticultura |
| الوصف: | The objective of research was to analyse the potential of Normalized Difference Vegetation Index (NDVI) maps from satellite images, yield maps and grapevine fertility and load variables to delineate zones with different wine grape properties for selective harvesting. Two vineyard blocks located in NE Spain (Cabernet Sauvignon and Syrah) were analysed. The NDVI was computed from a Quickbird-2 multi-spectral image at veraison (July 2005). Yield data was acquired by means of a yield monitor during September 2005. Other variables, such as the number of buds, number of shoots, number of wine grape clusters and weight of 100 berries were sampled in a 10 rows × 5 vines pattern and used as input variables, in combination with the NDVI, to define the clusters as alternative to yield maps. Two days prior to the harvesting, grape samples were taken. The analysed variables were probable alcoholic degree, pH of the juice, total acidity, total phenolics, colour, anthocyanins and tannins. The input variables, alone or in combination, were clustered (2 and 3 Clusters) by using the ISODATA algorithm, and an analysis of variance and a multiple rang test were performed. The results show that the zones derived from the NDVI maps are more effective to differentiate grape maturity and quality variables than the zones derived from the yield maps. The inclusion of other grapevine fertility and load variables did not improve the results. ; El objetivo de la investigación fue analizar el potencial de mapas del índice de vegetación de la diferencia normalizada (NDVI) a partir de imágenes de satélite, mapas de cosecha y variables de fertilidad y carga de las cepas para delinear zonas de manejo con diferentes propiedades de madurez y calidad de la uva. Se estudiaron dos parcelas localizadas en el NE de España (Cabernet Sauvignon y Syrah). El NDVI fue derivado de una imagen multiespectral Quickbird-2 adquirida en el envero (julio 2005). Los datos de cosecha fueron obtenidos por medio de un monitor de rendimiento en septiembre de 2005. Otras ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1695-971X |
| Relation: | Reproducció del document publicat a: https://doi.org/10.5424/sjar/2012102-370-11; Spanish Journal of Agricultural Research, 2012, vol. 10, núm. 2, p. 326-337; https://doi.org/10.5424/sjar/2012102-370-11; http://hdl.handle.net/10459.1/46395 |
| DOI: | 10.5424/sjar/2012102-370-11 |
| الاتاحة: | http://hdl.handle.net/10459.1/46395 https://doi.org/10.5424/sjar/2012102-370-11 |
| Rights: | (c) Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2012 ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.83C65DB9 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 1695971X |
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| DOI: | 10.5424/sjar/2012102-370-11 |