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Organic wastes as amendments for limestone quarry restoration in semiarid environments

AuthorsSolé-Benet, Albert ; Contreras, Sergio ; Miralles, Isabel ; Lázaro, Roberto
KeywordsSewage sludge
Solid urban residue
Organic ammendment
Issue DateNov-2009
AbstractAn experimental soil restoration project started in 2008 in a calcareous rock quarry in SE Spain, under Mediterranean semiarid conditions, on two different substrates (marl and topsoil). The substrates were amended with two different organic wastes: a sewage sludge and a compost. Two different mulches, mineral and organic, to mitigate soil water losses, were also tested. Three perennial species from nursery (Stipa tenacissima, Antyllis terniflora and Anthyllis cytisoides) were planted in subplots within every one of 16 experimental plots. A drip irrigation system was implemented to provide support water to every seedling under critical soil water conditions during the first months after plantation. The first results show an average survival rate of 73% in the replanted area. Survival was higher in the plots on marl than in the plots on topsoil, where the role of spontaneous vegetation might have played a negative role. A vigor index which considered plant height, width and number of leaves, has revealed that Stipa tenacissima reaches the highest vigor average value, followed in decreasing order by Anthyllis cytisoides and Anthyllis terniflora. However, when comparing the different treatments, the highest plant vigor corresponds to Anthyllis cytisoides in plots which combine the use of organic amendments and mineral mulch. Statistical GLM analyses indicate the significant role of support irrigation, organic amendments and mulches (in this order) for vegetation establishment and growth in this semiarid environment.
DescriptionEn: 1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009.-- Editors: F. A. López, F. Puertas, F. J. Alguacil and A. Guerrero.-- 3 pages, 1 figure, 1 table.
Appears in Collections:(EEZA) Comunicaciones congresos
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