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Advisor(s)
Abstract(s)
Stevia rebaudiana (Bertoni) is a perennial herb native from South America. It is
characterized by a high content of steviol glycosides in its leaves representing an
interesting no‐calorie sweetener. Since December 2011 has increased interest in this
species in Europe after steviol glycosides have been authorized as food additives. In
this work, the adaptation of stevia to the growing conditions of NE Portugal was
assessed, as well as the potential to produce biomass when grown as an annual crop
and subjected to various N rates (0 to 150 kg N ha‐1) and two cutting regimes (single
and double cut). Most plants died during the winter (minimum temperatures peaked
at ‐8.0 ºC at 10 cm aboveground), being necessary to replant the crop next spring. In
the double cut regime and the higher N rate 1514.4 and 2390.0 kg/ha of dry leaves and
4748.5 and 5215 kg ha‐1 of total dry matter were respectively produced in 2014 and
2015. Based on the leaf N concentrations recorded from these experiments,
preliminary sufficiency ranges of 25 to 35 g kg‐1 for mid‐summer and 15 to 25 g kg‐1 for
early autumn are proposed.
Description
Keywords
Stevia rebaudiana
Citation
Afonso, Sandra; Arrobas, Margarida; Ferreira, Isabel Q.; Rodrigues, M.A. (2016). Growing stevia in Northeastern of Portugal: effect of N rate and cutting regime. In I International Conference on Research for Sustainable Development in Mountain Regions: book of abstracts. Bragança: Instituto Politécnico. ISBN 978-972-745-214-9
Publisher
Instituto Politécnico de Bragança