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Additionally, exploitation of kelp resources for potash production left little kelp behind for local fertilizer and coastal land became more desirable than inland regions. [ 18 ] [ 21 ] The Scottish seaweed industry went through multiple boom and bust cycles, employing 10,000 families and producing 3,000 tonnes of ash per year during its peak.
An American kelp farmer, Bren Smith of GreenWave explains his farming methods, including the symbiotic relationship kelp has with other seafood he grows. The earliest seaweed farming guides in the Philippines recommended the cultivation of Laminaria seaweed and reef flats at approximately one meter's depth at low tide. They also recommended ...
Mixtures of compost with other organic materials such as Chitosan (which helps elicit plant defense), [14] or non-organic materials such as Montmorillonite-Illite clay and Diatomaceous earth are also often used to increase the minerals to support organism growth. Manure; Duckweed [15] Kelp has very high nutrient density. Seaweed and blue green ...
Seaweed fertilizer; Algae fuel – Use of algae as a source of energy-rich oils; Edible seaweed – Algae that can be eaten and used for culinary purposes Aonori – Type of edible green seaweed; Cochayuyo – Species of seaweed, a form of kelp used as a vegetable in Chile; Hijiki – Species of seaweed; Kombu – Edible kelp; Limu
It was also been used for certain herbal teas, particularly kelp teas. [6] [33] It has long been used as an organic and mainstream fertilizer for many varieties of crops due to its combination of both macronutrients, (N, P, and K) and micronutrients (Ca, Mg, S, Mn, Cu, Fe, Zn, etc.).
One water-soluble fertilizer is diammonium phosphate (DAP), (NH 4) 2 HPO 4, that as of 2008 had a market price of 1700/tonne−1 of phosphorus. Using that price and the C : P Redfield ratio of 106 : 1 produces a sequestration cost (excluding preparation and injection costs) of some $45 /tonne of carbon (2008), substantially less than the ...
An alternative offset would be to cultivate kelp forests. Kelp can grow at 2 feet per day, 30 times faster than terrestrial plants. Planting kelp across 10% of the oceans (4.5 x the area of Australia) could provide the same offset. Additionally, the kelp would support a fish harvest of 2 megatons per year and reduce ocean acidification. Large ...
Uses of commercial and industrial algae cultivation include production of nutraceuticals such as omega-3 fatty acids (as algal oil) [23] [24] [25] or natural food colorants and dyes, food, fertilizers, bioplastics, chemical feedstock (raw material), protein-rich animal/aquaculture feed, pharmaceuticals, and algal fuel, [26] and can also be used ...
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