A review of the use of seaweeds in agriculture and plant protection

Seaweed is considered as a natural source of organic and mineral substances, containing more than 60 minerals and 21 amino acids, several plant growth regulators, manifold and organic acids. It is a factor for increasing growth, absorption of nutrients, resistance to adverse plant stresses, soil fertility and microbial activity. The chemical compounds in algae depend on various factors, such as the type of algae, the duration of residence in the ocean, the geographical area of harvest, being exposed to waves, growth stage, seasonal changes, annual changes, physiological and environmental factors, water temperature, salinity, pH and It depends on the sample analysis method. Research based on compounds derived from seaweed has been carried out in a wide range of biological activities such as antibacterial, antiviral, antioxidant, anti-inflammatory, anti-fungal and insecticidal. Considering that unlike fertilizers and chemical poisons, dry powder or extracts from seaweeds have non-destructive environmental effects for humans, animals and birds, Therefore, it is suggested that in order to achieve sustainable agriculture and pest and disease management, this rich resource should be given more attention and research.