University of Tasmania

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Developing a rapid assessment technique to determine grapevine canopy nitrogen status

conference contribution
posted on 2023-05-23, 14:57 authored by Harriet WalkerHarriet Walker, Joanna JonesJoanna Jones, Nigel SwartsNigel Swarts, Thomas RodemannThomas Rodemann, Robert Dambergs, Fiona Kerslake
The industry standard method to determine grapevine canopy nitrogen (N) status is through leaf and petiole tissue analysis. The accepted method is destructive, expensive and the results often require technical assistance to interpret. A rapid and simpler method to predict vine canopy N status would be beneficial to the viticultural industry. The utilisation of proximal sensors (GreenSeeker, Crop Circle ACS-430 and SPAD-502) and near-infrared spectroscopy (NIRS) to predict vine canopy N content was explored in Vitis vinifera Pinot Noir and Chardonnay cultivars in Southern Tasmania, Australia. The measurements were correlated with leaf N content (%) obtained from Dumas Combustion via elemental analysis at three sampling dates (January, February and March) during the 2017-18 growing season. The GreenSeeker demonstrated the greatest sensor potential to predict vine canopy nitrogen content (r2 = 0.92). However, its predictability potential was both cultivar and sampling time dependent, as found with the Crop Circle ACS-430 and SPAD-502 meter. Alternatively, NIRS strongly predicted vine canopy N content independent of sampling time and cultivar (r2 = 0.94, RMSECV = 0.071). This study demonstrates that lab-based NIRS has the strongest potential to be utilised as tool to predict vine canopy N status. Further research is required to assess its suitability on fresh vine leaf samples in the field to provide industry with a non-destructive alternative.


Publication title

Proceedings of the International Symposium on Precision Management of Orchards and Vineyards




R. Lo Bianco et al.




Tasmanian Institute of Agriculture (TIA)


International Society for Horticultural Science

Event title

International Symposium on Precision Management of Orchards and Vineyards

Event Venue

Palermo, Sicily

Date of Event (Start Date)


Date of Event (End Date)


Rights statement

Copyright unknown

Repository Status

  • Restricted

Socio-economic Objectives

Wine grapes