Viticoltura di precisione: le mappe NDVI per fare qualità (prove nel Piacentino sul vitigno Barbera)

Translated title of the contribution: [Autom. eng. transl.] Precision viticulture: NDVI maps to make quality (tests in Piacentino on the Barbera vine)

Research output: Contribution to journalArticle

Abstract

[Autom. eng. transl.] In the last decade, a growing interest in precision viticulture has emerged (Tysseire et al. 2007). This technique aims to quantify the spatial and temporal variability of the vineyard in order to adopt a differentiated agronomic management through the input of inputs, such as water and fertilizers, in a proportionate and calibrated way with respect to the real need for the vines. It is known, in fact, how different viticultural areas are characterized by intra-parcel variability which, in the first instance, manifests itself in the form of different vegetative vigor and which is mainly attributable to variations in the physico-chemical characteristics of the soil. It is important to add that inadequate choices relating to the operations preliminary to the plant (break-in, leveling, drainage, etc.) to the form of breeding and to the management of the canopy can certainly influence or even increase the variability attributable only to natural factors (Poni et al ., 2013). Precision viticulture is therefore proposed, not so much as a late remedy for an incautious vineyard management, but as a valid tool to characterize and manage the variability attributable to causes of natural origin (Bramley and Hamilton, 2004). To date, precision viticulture is mainly based on the use of multispectral images from remote sensing, acquired from satellites and aircraft with or without a pilot (Matese and Di Gennaro, 2015) although, recently, new proximal sensing devices have been patented , more flexible in use, based on optical systems, laser scans, and ultrasound acquisitions (Wei and Salyani 2004, Llorens et al. 2011, Tagarakis et al. 2013, Nuske et al. 2014, Diago et al. 2016). Regardless of the technique used to acquire the images, the post-processing operations report the data to the calculation of a vegetation index. Among these, the most common is the NDVI (Normalized Difference Vegetation Index) based on the measurement of reflectance in the red (R) and near-infrared (NIR) bands which is proposed as a good indicator of the photosynthetically active biomass, which, at in turn, it is correlated with the size (vigor) and the functionality of the foliage (state of health and / or stress) (Bramley 2010). The NDVI, when represented graphically, allows you to map a plot of land according to different classes of force; later, these will have to be calibrated to the ground using physiological and agronomic indicators such as, for example, the number of leaf layers, the leaf surface and the weight of the pruning wood. The western viticulture of the Colli Piacentini insists mainly on two pedological series known as ancient red earths and clayey lands of the Val Tidone. The latter is characterized by great unevenness in the land. In fact, the coexistence of the so-called “Vicobarone” soils, with a clayey texture and a high limestone content, and the “Montalbo” pedological unit, with a clay-silt texture and a gravely skeleton, is reported to be coexistent. This clear difference in the composition of soils is reflected in heterogeneous vegeto-productive responses of plants. In particular, the presence of areas with different vigor within the same plot inevitably leads to a different maturation of the grapes. Therefore, the intra-parcel variability could be simply "exploited" for productive purposes by carrying out a selective harvest based on the classes of vigor or, alternatively, being "correct", for example, using fertilization techniques with variable rate, for the purpose of reduce it by making it converge towards the optimal vigor class. Based on these premises, in the two-year period 2012-2013, a precision viticulture test was conducted in the Val Tidone area aimed at: i) assessing whether it exists and
Translated title of the contribution[Autom. eng. transl.] Precision viticulture: NDVI maps to make quality (tests in Piacentino on the Barbera vine)
Original languageItalian
Pages (from-to)35-40
Number of pages6
JournalL'INFORMATORE AGRARIO
Publication statusPublished - 2017

Keywords

  • NDVI
  • Viticoltura di precisione

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