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Effects of cutting on vegetative development and biomass quality of perennial halophytes grown in saline aquaponics

Horticultura Brasileira, 2022-12, Vol.40 (4), p.432-440 [Peer Reviewed Journal]

This work is licensed under a Creative Commons Attribution 4.0 International License. ;ISSN: 0102-0536 ;ISSN: 1806-9991 ;EISSN: 1806-9991 ;DOI: 10.1590/s0102-0536-20220412

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  • Title:
    Effects of cutting on vegetative development and biomass quality of perennial halophytes grown in saline aquaponics
  • Author: Doncato, Kennia B ; Costa, César SB
  • Subjects: HORTICULTURE
  • Is Part Of: Horticultura Brasileira, 2022-12, Vol.40 (4), p.432-440
  • Description: ABSTRACT The cultivation of vascular plants in aquaculture is becoming increasingly important and saline aquaponics have been centered on plants with a short life cycle (i.e. annual species). However, the cultivation of perennial halophytes can allow to produce biomass year-round by repeated cuttings and regrowth. The present study evaluated the effects of different cutting regimes on the growth and tissue nitrogen uptake of the perennial halophyte Paspalum vaginatum and Salicornia neei cultivated in saline aquaponics. Clarified water from Litopenaeus vannamei cultivation was used as the main source of water and nutrients to grow plants established in Nutrient Film Technique (NFT). In each trial (28 days), three groups of 22 plants were established in different NFT benches and subjected to no cutting, one harvest and two harvests. Cutting regimes applied to both halophytic species did not affect the quality of recirculating water. Tillering and stem elongation of P. vaginatum had increasing trends with augment of cutting frequency. Salicornia neei cut at 28-day intervals produced a larger number of marketable size branches with less lignified shoots than non-cut plants and branchy plants cut every 14 days, which showed the smallest branch size. Individual plants of P. vaginatum and S. neei took up in their tissues between 2.27-2.45 mg/day of N and 4.59-6.43 mg/day of N, respectively. Cutting regimes did not statistically affect the accumulation of nitrogen in the biomass of either halophytic species. One harvest treatment, every 28 days, was considered the most suitable practice for aquaponics production of both halophytes. RESUMO O cultivo de plantas vasculares na aquicultura está se tornando cada vez mais importante e a aquaponia salina tem centrado no cultivo de plantas com o ciclo de vida curto (i.e. plantas anuais). Entretanto, o cultivo de plantas perenes pode permitir a produção de biomassa durante todo o ano por cortes repetidos e rebrote. O presente estudo avaliou os efeitos de diferentes regimes de poda no crescimento e absorção tecidual de nitrogênio das halófitas perenes Paspalum vaginatum e Salicornia neei cultivadas em aquaponia salina. A água clarificada do cultivo de Litopenaeus vannamei foi utilizada como principal fonte de água e nutrientes para o cultivo de plantas estabelecidas em Nutrient Film Technique (NFT). Em cada ensaio (28 dias), três grupos de 22 plantas foram estabelecidos em diferentes bancadas NFT e submetidos a nenhum corte, um corte e dois cortes. Os regimes de poda aplicados a ambas as espécies halófitas não afetaram a qualidade da água de recirculação. O perfilhamento e o alongamento do caule de P. vaginatum apresentaram tendências crescentes com o aumento da frequência de corte. Salicornia neei cortada em intervalos de 28 dias produziu um maior número de ramos de tamanho comercializável com menos ramos lignificados do que plantas não cortadas e plantas ramificadas cortadas a cada 14 dias, que apresentaram o menor tamanho de ramo. Plantas individuais de P. vaginatum e S. neei absorveram em seus tecidos entre 2,27-2,45 mg/dia de N e 4,59-6,43 mg/dia de N, respectivamente. Os regimes de corte não afetaram estatisticamente o acúmulo de nitrogênio na biomassa de nenhuma das espécies halófitas. O tratamento de uma poda, a cada 28 dias, foi considerado a prática mais adequada para a produção de aquaponia de ambas as halófitas.
  • Publisher: Associação Brasileira de Horticultura
  • Language: English;Portuguese
  • Identifier: ISSN: 0102-0536
    ISSN: 1806-9991
    EISSN: 1806-9991
    DOI: 10.1590/s0102-0536-20220412
  • Source: SciELO
    Geneva Foundation Free Medical Journals at publisher websites
    Alma/SFX Local Collection
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