Espresso coffee residues as a nitrogen amendment for small‐scale vegetable production

Publisher: John Wiley & Sons Inc

E-ISSN: 1097-0010|95|15|3059-3066

ISSN: 0022-5142

Source: JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, Vol.95, Iss.15, 2015-12, pp. : 3059-3066

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Abstract

AbstractBACKGROUNDEspresso coffee grounds constitute a residue which is produced daily in considerable amounts, and is often pointed out as being potentially interesting for plant nutrition. Two experiments (incubations and field experiments) were carried out to evaluate the potential nitrogen (N) and phosphorus (P) supply for carrot (Daucus carota L.), spinach (Spinacea oleracea L.) and lettuce (Lactuca sativa L.) nutrition.RESULTSImmobilisation of nitrogen and phosphorus was detected in all the incubations and, in the field experiments, germination and yield growth were decreased by the presence of espresso coffee grounds, in general for all the species studied.CONCLUSIONThe study showed an inhibition of N and P mineralisation and a reduction of plant germination and growth. Further research is required to determine whether this is related to the immobilising capacity of the residue or possibly due to the presence of caffeine. © 2015 Society of Chemical Industry