UNCONVENTIONAL SUBSTRATES IN VEGETABLE CULTIVATION: COFFEE GROUNDS AND EGGSHELLS AS SUSTAINABLE ALTERNATIVES
DOI:
https://doi.org/10.56238/arev8n3-085Keywords:
Alternative Substrates, Coffee Grounds, Eggshells, Sustainable Horticulture, Circular EconomyAbstract
The growing demand for sustainable agricultural practices has driven the search for alternative substrates to conventional materials in vegetable cultivation. This review addresses the use of unconventional substrates, with an emphasis on coffee grounds and eggshells, analyzing their physicochemical properties, agronomic benefits, limitations, and potential application in modern horticulture. Recent studies demonstrate that coffee grounds (SCG - Spent Coffee Grounds) can partially replace peat in substrates when used in appropriate proportions (2.5–5%), improving soil characteristics and providing essential nutrients. Eggshells, rich in calcium carbonate, act as a soil conditioner, correcting acidity and preventing physiological disorders such as blossom-end rot. The use of these organic residues contributes to the circular economy, reduces landfill disposal, and offers economically viable alternatives to producers. However, challenges related to the presence of phytotoxic compounds in coffee grounds and the need for proper processing require attention. This review synthesizes current scientific evidence and identifies knowledge gaps, providing guidance for future research and practical applications.
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