TITLE:
Nutrient Accumulation in Amaryllis
AUTHORS:
Caroline de Moura D’Andréa Mateus, Kathia Fernandes Lopes Pivetta, Roberto Lyra Villas Bôas, Regina Maria Monteiro de Castilho, Maria Márcia Pereira Sartori, Renata Bachin Mazzini-Guedes
KEYWORDS:
Plant Nutrition, Ornamental Geophytes, Hippeastrum hybrid
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.9 No.2,
January
26,
2018
ABSTRACT: Amaryllis plants (Hippeastrum hybrid, in the family Amaryllidaceae) are cultivated in
Brazil mainly for bulb export. Studies about the nutrient accumulation dynamics
by the species are yet incipient when considering Brazilian cultivation
conditions. The objective was to determine the nutrient accumulation in
amaryllis “Orange Souvereign” cultivated in the field. The experimental design
was entirely randomized with four replications and 14 collection periods (at
30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360, 390, and 420 days
after planting). Sampled plants were divided into leaves, bulb, and roots,
which were used for determination of nutrient accumulation by leaves (aerial
part) and bulb + roots (underground part). Nutrient accumulation of N, P, K,
Ca, Mg, S, B, Cu, Fe, Mn, and Zn was calculated for each collection period, and then represented by curves of macro and micronutrient accumulation,
as well as accumulation percentages for each plant part. For most macro and
micronutrients, the interval of maximum accumulation fell from 301 to 420 days
after planting, matching with the cycle final stage of plants cultivated in the
field. Accumulated macronutrients by amaryllis plants along
the cultivation cycle was, in g·plant-1: 1.57 N; 0.19 P; 2.58 K; 0.64 Ca; 0.20 Mg; and 0.29 S, following the
descending order: K > N > Ca > S > Mg > P. Accumulated
micronutrients, in mg·plant-1, was: 2.18 B; 1.17 Cu;
22.33 Fe; 2.19 Mn; and 4.09 Zn, following the descending order: Fe > Zn >
Mn > B > Cu.