ANALYSIS OF SPATIAL VARIABILITY AND ZONES OF PRODUCTIVITY IN VINEYARDS IN THE GAÚCHO CENTRAL VALLEY
A precision viticulture pilot project was implemented at Vinícola Velho Amâncio, Itaara, RS. The objective was to analyze the spatial variability in Vitis vinifera L. cv. Shiraz (SH) and Cabernet Sauvignon (CS) and propose productivity zones (ZP) in vineyards with 1.3 ha and 21 years old. In 2020, o...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | Brasil |
| Institución: | Universidade Federal de Mato Grosso (UFMT) |
| Repositorio: | Nativa (Sinop) |
| Idioma: | portugués |
| OAI Identifier: | oai:periodicoscientificos.ufmt.br:article/15696 |
| Acceso en línea: | https://periodicoscientificos.ufmt.br/ojs/index.php/nativa/article/view/15696 |
| Access Level: | acceso abierto |
| Palabra clave: | Índices de Vegetação Aeronave Remotamente Pilotada Viticultura de Precisão |
| Sumario: | A precision viticulture pilot project was implemented at Vinícola Velho Amâncio, Itaara, RS. The objective was to analyze the spatial variability in Vitis vinifera L. cv. Shiraz (SH) and Cabernet Sauvignon (CS) and propose productivity zones (ZP) in vineyards with 1.3 ha and 21 years old. In 2020, orthomosaic was obtained with RPA and area in GIS, in 2021/22 productive (PlP), unproductive (PlI), failed/dead (F/M) and bunches of grapes (NCu) counts were obtained at 50 points georeferenced samples (PA - three vines), vegetation indices with RGB and RedEdge-Mx sensors in RPA and spectroradiometer, relative chlorophyll content with chlorophyll meter and estimated productivity (NCu*mean wet weight [SH 87.51g; CS 44, 11g]). Interpolation, descriptive statistics/box plot, Mann-Whitney test (p=0.05), Spearman correlation (p=0.05), zonal statistics and areas of influence of AP in GIS, and cluster analysis were applied to propose ZP. There was heterogeneity and high variability in the data, high rates of PlI, F/M, low productivity and reduction in 2021/22. MPRI and RED/GREEN showed moderate correlations with cumulative productivity, 0.67 and -0.66 (p<0.05). Three ZP (low, medium and high) were obtained, respectively with 0.170; 0.740; 1.29 kg grape PA-1 and 0.4166; 0.1723; 0.6239 ha. The results suggest decline of the vines and interventions will be necessary to increase productivity. |
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