name two algae used in agriculture and industry
Answers
Answer:
assessed exploitation of Chlorella vulgaris and Spirulina platensis as a biofertilizer for rice cultivation. The rice yield increased from 7%–20.9% respectively, which makes microalgae a viable “green” alternative for chemical fertilizers [45].
The most commonly used algae for aquaculture feed are Chlorella, Tetraselmis, Pavlova, Phaeodactylum, Nannochloropsis, Skeletonemaand Thalassiosira. By using Chlorella and Spirulina, or their mixture many companies are making aquaculture feed.
Multicellular examples of algae include the giant kelp and brown algae. Unicellular examples include diatoms, Euglenophyta and Dinoflagellates.
Industrial and commercial uses
Carrageenan is an algae widely used as a stabiliser in food, to prevent separation of the mixtures. Carrageenan can also be found as a food thickener in a range of products such as ice-cream, toothpaste and cosmetics.
Answer:
Algae species that can be used to increase soil fertility:
Chlorella and Spirulina increased soil total nitrogen and available phosphorus, and Spirulina improved soil nitrate levels.
Additional information:
Bio Fertilization is a sustainable agricultural practice that involves the use of biofertilizers to increase the nutrient content of the soil, resulting in higher productivity. Soil microflora improves soil fertility and increases biomass productivity and is recognized as a good environmentally friendly bio-based fertilizer in pollution-free agriculture. Most cyanobacteria can fix nitrogen from the atmosphere, and several species, including Anabaena sp., Nostoc sp. and Oscillatoria angustissima, are known to be effective biofertilizers based on cyanobacteria. Acutodesmus dimorphus, Spirulina platensis Chlorella vulgaris, Scenedesmus dimorphus, Anabaena azolla and Nostoc sp. are some species of green microalgae and cyanobacteria that have been successfully used as biofertilizers to improve crop growth. Chlorella vulgaris is also one of the most widely used microalgae in biofertilizer research. The addition of seaweed species that are Sargassum sp. and Gracilaria verrucosa cause chemical changes as an indicator of soil fertility in clay and sandy soils, and the addition of seaweed improver to the soil can improve its organic content, normalize pH and reduce the C/N ratio in both sandy and clay soils. This review provides an effective approach to increase soil fertility using an environmentally friendly bio-based fertilizer containing micro- and macroalgae. Instead of using inorganic and organic fertilizers, which have polluted the soil as an aggregation of heavy metals, in addition to their carcinogenic effects on humans.
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