Back to the Origins: Potential of Beach-Cast Macroalgae as Biofertilizer View Full Text


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Article Info

DATE

2022-09-18

AUTHORS

Sara Pardilhó, João Cotas, Diana Pacheco, Kiril Bahcevandziev, Leonel Pereira, Maria Beatriz Oliveira, Joana Maia Dias

ABSTRACT

In the present study, Marine Macroalgae Waste (MMW) biomass, mainly composed of Saccorhiza polyschides, collected from the seashore in northern Portugal, was characterized and seed germination was performed to evaluate the potential of re-exploiting this biomass for agricultural purposes. Kale (Brassica oleracea L) and parsnip (Pastinaca sativa) seeds were used in laboratory assays (23 °C; 10—33 days) to study the effect of using two types of MMW derived products: liquid (water extraction, 0.12 g/mL; diluted at 1.2 vol.%) and solid (after filtering the extract); distilled water was used as control. The germination rate and growth parameters (radicular and aerial part lengths and weights) of the seedlings were further measured. The raw biomass showed promising results for agricultural purposes due to the high carbohydrate content (69.97 ± 0.08 wt.%), mainly composed by fibers (63.4 ± 0.1 wt.%), and the presence of minerals (ash content of 18.54 ± 0.07 wt.%). High amounts of K (2242 mg/100 g), Ca (1886 mg/100 g), Na (985 mg/100 g) and Mg (546 mg/100 g) were found in the ash, with the toxic elements content being within the regulated limits. Seeds germinated better with the liquid extract than with the solid product, with significantly higher (p < 0.05) aerial and radicular lengths and weights compared to the control, from up to 42 and 27% for kale and parsnip seeds, respectively. The results show that the production of biostimulants, biofertilizers or soil conditioners from this resource might be feasible and that further studies should be conducted.Graphical abstract More... »

PAGES

1-15

References to SciGraph publications

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  • 2012-11-29. Enhancing soil health and productivity of Lycopersicon esculentum Mill. using Sargassum johnstonii Setchell & Gardner as a soil conditioner and fertilizer in JOURNAL OF APPLIED PHYCOLOGY
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    26 schema:description In the present study, Marine Macroalgae Waste (MMW) biomass, mainly composed of Saccorhiza polyschides, collected from the seashore in northern Portugal, was characterized and seed germination was performed to evaluate the potential of re-exploiting this biomass for agricultural purposes. Kale (Brassica oleracea L) and parsnip (Pastinaca sativa) seeds were used in laboratory assays (23 °C; 10—33 days) to study the effect of using two types of MMW derived products: liquid (water extraction, 0.12 g/mL; diluted at 1.2 vol.%) and solid (after filtering the extract); distilled water was used as control. The germination rate and growth parameters (radicular and aerial part lengths and weights) of the seedlings were further measured. The raw biomass showed promising results for agricultural purposes due to the high carbohydrate content (69.97 ± 0.08 wt.%), mainly composed by fibers (63.4 ± 0.1 wt.%), and the presence of minerals (ash content of 18.54 ± 0.07 wt.%). High amounts of K (2242 mg/100 g), Ca (1886 mg/100 g), Na (985 mg/100 g) and Mg (546 mg/100 g) were found in the ash, with the toxic elements content being within the regulated limits. Seeds germinated better with the liquid extract than with the solid product, with significantly higher (p < 0.05) aerial and radicular lengths and weights compared to the control, from up to 42 and 27% for kale and parsnip seeds, respectively. The results show that the production of biostimulants, biofertilizers or soil conditioners from this resource might be feasible and that further studies should be conducted.Graphical abstract
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    31 Ca
    32 Further studies
    33 Graphical Abstract
    34 MMW
    35 Mg
    36 Na
    37 Portugal
    38 Saccorhiza polyschides
    39 agricultural purposes
    40 amount
    41 ash
    42 assays
    43 biofertilizer
    44 biomass
    45 biostimulants
    46 carbohydrate content
    47 conditioner
    48 content
    49 control
    50 distilled water
    51 effect
    52 element contents
    53 extract
    54 fibers
    55 germination
    56 germination rate
    57 growth parameters
    58 high amounts
    59 high carbohydrate content
    60 kale
    61 laboratory assays
    62 length
    63 limit
    64 liquid
    65 liquid extract
    66 macroalgae
    67 minerals
    68 northern Portugal
    69 origin
    70 parameters
    71 parsnip seeds
    72 potential
    73 presence
    74 presence of minerals
    75 present study
    76 production
    77 products
    78 promising results
    79 purpose
    80 radicular length
    81 rate
    82 raw biomass
    83 regulated limits
    84 resources
    85 results
    86 seashore
    87 seed germination
    88 seedlings
    89 seeds
    90 soil conditioner
    91 solid products
    92 study
    93 toxic element contents
    94 types
    95 waste biomass
    96 water
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