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Germination and sustainable cultivation of succulent halophytes using resources from a degraded estuarine area through soil technologies approaches and saline irrigation water
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Orientador(es)
Resumo(s)
The degradation of estuarine areas has been a growing concern in recent years, as
these ecosystems offer several services. The Arthrocnemum and Suaeda genera produce
useful compounds with various applications, which have led to their overexploitation
in their native habitats. The main goal of this study is to use green
technologies for sustainable cultivation of two species bioindicators of Mediterranean
saltmarshes, Arthrocnemum macrostachyum and Suaeda vera, as an alternative to
their overutilization. A tailored soil (TAIL) was constructed with a Saline Fluvisol
(FLU), from a marginal estuarine area, and organic/inorganic residues were used as
amendments, for plant cultivation. Seeds collected in natural populations were pretreated
with two dormancy-breaking treatments (H2SO4, H2O2) and germinated in
FLU or TAIL. A microcosm assay using FLU or TAIL irrigated with estuarine water
(VF) or three aqueous saline solutions (0, 200, or 400 mmol/L NaCl) was established.
The species obtained a low percentage of seeds' germination being the highest values
under substrate control (water-soaked filter paper). The A. macrostachyum reached
the highest germination percentage when seeds were pretreated with H2SO4 (20%)
while the germination of S. vera was favored by the pretreatment with H2O2 (49%).
Both species had the highest growth in TAIL irrigated with 0 or VF, presenting the
largest stems (13–32 cm), the largest primary branches (3.5–7.2 cm), and the highest
production of aerial part biomass (28–36 g). This study contributes to the sustainable
cultivation of these valuable halophytes and could play an important role in the sustainable
management of marginal estuarine land.
Descrição
Palavras-chave
amended soils Arthrocnemum macrostachyum brackish irrigation saline marginal land Suaeda vera
Contexto Educativo
Citação
Cortinhas, A., Ferreira, T. C., Abreu, M. M., & Caperta, A. D. (2023). Germination and sustainable cultivation of succulent halophytes using resources from a degraded estuarine area through soil technologies approaches and saline irrigation water. Land Degradation & Development, 1– 13.