On-line version ISSN 1678-992X
LIMA FILHO, O.F. de; MALAVOLTA, E; SENA, J.O.A. de and CARNEIRO, J.W.P. ABSORÇÃO E ACUMULAÇÃO DE NUTRIENTES EM ESTÉVIA Stevia rebaudiana (Bert.) Bertoni: I. MACRONUTRIENTES. Sci. agric. [online]. 1997, vol.54, n.1-2, pp.14-22. ISSN 1678-992X. http://dx.doi.org/10.1590/S0103-90161997000100003.
Uptake and accumulation of macronutrients by stevia were studied under field conditions. Two nutritional indices were evaluated: Nutritional Relative Absorption Rate and Nutritional Organogenic Net Accumulation Rate. Seven samplings with fortnight intervals were made beginning after transplanting. Shortly before or at flowering the production of 1 ton of dry leaves demands, in kg: N-64.6; P-7.6; K- 56.1; Ca -15.8; Mg-3.6 and S-3.6. For seed production corresponding to 1 ton of dry leaves, the extraction of macronutrients in kg, is: N-130; P-18.8; K-131.5; Ca-43.7; Mg-8.3 and S-9.7.
Keywords : stevia; mineral nutrition; macronutrients; uptake rate; accumulation of nutrients.