Seaweeds as Plant Fertilizer, Agricultural Biostimulants and Animal Fodder

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<P>The main effects of Seaweed extracts (<I>Ascophyllum, Fucus, Sargassum, Saccorhiza, Laminaria, Gelidium</I> and others), when used as agricultural fertilizers, are better seed germination and higher quality fruit production, with longer shelf life; better use of soil nutrients; more productive crops and plants with greater resistance to unfavorable environmental conditions.</P><br/><br/><P>Algae also have a long history of use as animal feed. They have a highly variable composition depending on the species, collection season and habitat, and on external conditions such as water temperature, light intensity and nutrient concentration in water.</P><br/><br/><P>In relation to ruminal fermentation, a high variability of the digestibility values ??was found among seaweed species and cannot be attributed only to the composition of different nutrients of the algae. The role of marine algae for reduction of methane production is discussed with particular emphasis on novel algae-based feed s