Abstract
Posidonia oceanica and poultry droppings cause serious economic and environmental problems. Composting is the most reasonable way to profit from their highly valuable organic matter. A mixture of Posidonia oceanica and poultry droppings at different proportion: C1 (100%, 0), C2 (80%, 20%) and C3 (60%, 40%) were selected for composting. The physical and chemical parameters were monitored during composting over 85 days. The most appropriate parameters selected should be to establish the quality and maturity of final compost. The C3 compost gives a better quality of compost by increasing the bioavailability of nutrient contents such as N, Ca, K, P, Mg and their C/N = 12.20 is the established value for highly mature compost. The germination index (GI) was recorded as 46.67 ± 1.15%, 70 ± 0.82% and 86.67 ± 1.7% for C1, C2 and C3 mature compost, respectively. The GI was best correlated to the poultry droppings percentage in compost substrate (R2 = 0.91). Thus C3 may improve soil fertility and soil quality for horticulture purpose.
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