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Calibration of chlorophyll hand-held meter based on vineyard NDVI zones for estimation of leaf N content. Repositório Alice
SILVA, T. M. M. da; COSTA, B. R. S.; OLDONI, H.; FOSCHINI, M. M.; BASSOI, L. H..
The monitoring of chlorophyll content in grapevine leaves allows us to evaluate their N status, assisting with the information for the decision make about nutrient rate and application time to the vineyard. The present work aimed to propose an easy-to-use procedure for the calibration of a chlorophyll hand-held meter based on the NDVI homogeneous zones in a vineyard for the device readings and leaf sampling. We evaluated the wine grape ?Chardonnay? growing under drip irrigation in a vineyard located in the Southeast region of Brazil. Readings of the relative chlorophyll indices (a, b, and total) were taken in situ four times throughout the 2019 growing season, with the device placed on two leaves of every 40 pre-selected target plants in two homogeneous...
Tipo: Artigo de periódico Palavras-chave: Wine grapevine; Drip irrigation; Precision viticulture.
Ano: 2022 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1148987
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Homogeneous zones of vegetation index for characterizing variability and site-specific management in vineyards Scientia Agricola
Oldoni,Henrique; Costa,Bruno Ricardo Silva; Bognola,Itamar Antônio; Souza,Claudia Rita de; Bassoi,Luís Henrique.
ABSTRACT Characterization of the spatial variability of vegetative vigor in vineyards can help improve the performance of site-specific management practices, or the management of vineyards with different rates. Characterization using canopy proximal sensing has been a widely disseminated technique; however, vineyards in southeastern Brazil, where the utilization of annual double pruning results in a winter harvest, knowledge of the role of variability in improving vineyard management has not yet been applied. This study aimed to determine if post-veraison mapping of a normalized difference vegetation index could be used to assess the variability in grapevine vigor, water status, physiology, yield and berry quality attributes at harvest in an irrigated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis vinifera L.; Precision viticulture; Proximal sensing; Vegetative vigor; Grape quality.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000400101
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Normalized difference vegetation index obtained by ground-based remote sensing to characterize vine cycle in Rio Grande do Sul, Brazil Ciência e Agrotecnologia
Junges,Amanda Heemann; Fontana,Denise Cybis; Anzanello¹,Rafael; Bremm,Carolina.
ABSTRACT The normalized difference vegetation index (NDVI) obtained by remote sensing is widely used to monitor annual crops but few studies have investigated its use in perennial fruit crops. The aim of this study was to determine the temporal NDVI profile during grapevine cycle in vineyards established in horizontal training systems. NDVI data were obtained by the ground-based remote sensing Greenseeker in Chardonnay and Cabernet Sauvignon vineyards located in the Serra Gaúcha region, Rio Grande do Sul, Brazil, from September to June in the 2014/2015 and 2015/2016 vegetative seasons. The grapevine canopies were managed in horizontal training systems (T-trellis and Y-trellis). The results indicated that the temporal NDVI values varied during the grapevine...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis vinifera; Greenseeker; Precision viticulture.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500543
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Orbital images for spatial and temporal characterization of vineyard by vegetation index in the "campanha gaúcha" wine region, Brazil. Repositório Alice
PAULETTO, H.; HOFF, R.; JUNGES, A. H.; VALENTI, E. da S.; ALBERTI, R..
ABSTRACT Remote sensing has become an important technique for spatial characterization and agricultural monitoring, in order to improve wine development and reduce production costs. The wine region of the ?Campanha Gaúcha?, Brazil, was recognized in 2020 as an Indication of Origin for quality wines. This study analyzed orbital data in a ?Cabernet sauvignon? vineyard in the municipality of Santana do Livramento. From the images of the Planet and Sentinel-2 satellites, the Normalized Difference Vegetation Index (NDVI) was evaluated, as well as its viability in viticulture in the region. Twelve images from each satellite were analyzed using digital image processing techniques, average NDVI temporal profiles were generated and analyzed by statistical methods....
Tipo: Artigo de periódico Palavras-chave: NDVI; Precision viticulture; Sentinel 2; Planet; Viticultura de precisão; Sensoriamento Remoto; Remote sensing.
Ano: 2022 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1142547
Registros recuperados: 4
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