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Research Article

Effects of Variable Rate Nitrogen Application on cv. Barbera Performance: Vegetative Growth and Leaf Nutritional Status

Matteo Gatti, Cecilia Squeri, Alessandra Garavani, Alberto Vercesi, Paolo Dosso, Irene Diti, Stefano Poni
Am J Enol Vitic.  2018  69: 196-209  ; DOI: 10.5344/ajev.2018.17084
Matteo Gatti
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Cecilia Squeri
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Alessandra Garavani
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Alberto Vercesi
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Paolo Dosso
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Irene Diti
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Stefano Poni
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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  • For correspondence: stefano.poni@unicatt.it
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Abstract

Variable rate application of vineyard inputs in field parcels characterized by different levels of vigor and/or yield is one of the most promising applications of precision agriculture. In a four-year study, we provided ground-truthing of three different vigor levels (L = low, M = medium, and H = high) derived pre-trial from Normalized Difference Vegetation Index (NDVI) values determined by remotely sensed imagery (5 m pixel resolution) in a small Barbera vineyard (0.64 ha). Each vigor level was subjected to three fertilization strategies (S) consisting of no N supply (C, 0 kg/ha), standard supply (S, 60 kg/ha), and variable-rate application (VRA) delivering 0, 60, and 120 kg/ha to H, M, and L vines, respectively. Post-trial effects were assessed by taking another NDVI satellite image at the same resolution and by adding proximal sensing performed with the MECS-VINE sensor yielding the estimation of a canopy index (CI). Ground-truthing was based on recording main vine growth parameters and leaf nutritional status. Results show that vine balance of L vines was optimal. Variability among vigor levels was significantly reduced in years 3 and 4, while mean effects related to fertilization strategy were not significant and very few S × V and S × Y interactions were found. However, when the ground-truthing assessment was compared with the CI index values, it was very clear that VRA was able to reduce variability among vigor levels (CV = 1.42%) versus standard fertilization at 60 kg/ha (8.20%).

  • leaf area
  • leaf nutrition
  • precision viticulture
  • remote sensing
  • urea
  • vine vigor
  • Received September 2017.
  • Revision received January 2018.
  • Accepted February 2018.
  • Published online June 2018
  • ©2018 by the American Society for Enology and Viticulture
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Effects of Variable Rate Nitrogen Application on cv. Barbera Performance: Vegetative Growth and Leaf Nutritional Status
Matteo Gatti, Cecilia Squeri, Alessandra Garavani, Alberto Vercesi, Paolo Dosso, Irene Diti, Stefano Poni
Am J Enol Vitic.  2018  69: 196-209  ; DOI: 10.5344/ajev.2018.17084
Matteo Gatti
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Cecilia Squeri
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Alessandra Garavani
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Alberto Vercesi
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Paolo Dosso
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Irene Diti
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Stefano Poni
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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  • For correspondence: stefano.poni@unicatt.it

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Effects of Variable Rate Nitrogen Application on cv. Barbera Performance: Vegetative Growth and Leaf Nutritional Status
Matteo Gatti, Cecilia Squeri, Alessandra Garavani, Alberto Vercesi, Paolo Dosso, Irene Diti, Stefano Poni
Am J Enol Vitic.  2018  69: 196-209  ; DOI: 10.5344/ajev.2018.17084
Matteo Gatti
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
  • Find this author on Google Scholar
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Cecilia Squeri
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Alessandra Garavani
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Alberto Vercesi
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Paolo Dosso
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Irene Diti
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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Stefano Poni
1Department of Sustainable Crop Production (DI.PRO.VE.S.), Università Cattolica del Sacro Cuore, Via Emilia Parmense 84 – 29122 Piacenza (Italy)
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  • For correspondence: stefano.poni@unicatt.it
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