Macroalgae in shore of Latvia – opportunity or simply sea waste?
2022
SkuteleSkutele, Kristiāna, Kristiana | MeskisMešķis, Sandijs, Sandijs | Dorbe, Adrija
The European Union’s Green deal for Agriculture calls for new solutions to replace fertilizers in order to provide plants with the essential nutrients. The course is also focused on the sustainable use and management of water resources (blue bioeconomics policy). These two policies in Latvia can be solved widely by using the algae from sea shore in agriculture as organic fertilizers. The purpose of the study is to find out what is hidden under the term “algae” and how to most correctly determine the sea material washed up on the coast of Latvia; as well as to study the literature to determine whether they are a potential substitute for fertiliser in agriculture, and if their industrial collection and production is possible and justified. According to the literature study, it is acceptable to call the unsorted drifts washed up on the sea coast with the popular term “sea manure”, however, when looking at individual green algae, brown algae, red algae, it is correct to combine them under the term “macroalgae”. Due to the amount of essential plant nutrients in macroalgae, they are not sufficiently effective as a fertiliser in agriculture. Furthermore, macroalgae contain a large number of biologically active substances which make it possible to obtain preparations from algae to promote plant growth; though various factors (heavy metals, plastics, etc.) that limit the use of algae in agriculture must also be taken into account.
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