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Posidonia residues can be used as organic mulch and soil amendment for lettuce and tomato production

Grassi, Francesco; Mastrorilli, Marcello; Mininni, Carlo; Parente, Angelo; Santino, Angelo; Scarcella, Marcello and Santamaria, Pietro (2015) Posidonia residues can be used as organic mulch and soil amendment for lettuce and tomato production. Agronomy for Sustainable Development, pp. 679-689.

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Document available online at: https://hal.archives-ouvertes.fr/hal-01284290


There is a need for sustainable fertilizers because common mineral fertilizers are increasingly costly and often induce water and air pollution. For instance, seagrass compost could be used as fertilizer in the coastal areas of the Mediterranean, thus also solving the issue of beached residues. Here, we studied organic fertilization by application of seagrass-based compost in a tomato and lettuce crop succession. Composts were made of posidonia and yard wastes at 1/4 w/w fresh weight ratio. Compost was applied at two concentrations: 10 and 20 Mg ha−1 fresh weight. Fresh leaves of posidonia were also tested directly as organic mulch in plots treated with conventional fertilizers. A control treatment involved mineral fertilization without mulching soil. Herbicide applications were performed in non-mulched plots immediately before transplanting of tomato and lettuce for controlling the weeds, while mulched treatments did not receive any herbicide application. Results show that 20 Mg ha−1 of posidonia-based compost is equivalent to the inorganic fertilization because the nutritional status and yield of tomato and lettuce were statistically similar. No phytotoxicity symptoms were observed in any of the tomato and lettuce plants mulched with posidonia. The same growth rate was observed for tomato and lettuce growing under conventional management practices: mineral fertilizer and herbicide applications. Overall, our findings show that seagrass-based compost is a promising, sustainable fertilizer for tomato and lettuce.

EPrint Type:Journal paper
Keywords:Organic farming (en), Composting process and compost application (en), Organic fertilization (en), Organic mulch (en), Sustainable development (en), Crop rotations and management (en), Seagrass compost (en)
Subjects:"Organics" in general
Research affiliation: France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
ISSN:ISSN: 1774-0746
Related Links:https://hal.archives-ouvertes.fr/hal-01284290/document
Project ID:HAL-INRAe
Deposited By: PENVERN, Servane
ID Code:41573
Deposited On:12 Aug 2021 10:37
Last Modified:12 Aug 2021 10:37
Document Language:English

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