Composts que es produeixen a Catalunya: caracterització i viabilitat del seu ús com a substrat

Large amounts of compost are produced in Catalonia. The use of compost
in substrate mixtures is a potential use of this material. The main goal
of this study is to characterize different kinds of compost produced in
composting plants in Catalonia. The following types have been considered:
municipal waste organic fraction compost, green waste compost,
pine bark compost (or compost based on pine bark) and manure compost.
Physical, physico-chemical, chemical and biological properties were examined.
Results show that the physical properties of the different materials are
appropriate. However, the physico-chemical properties (pH and salinity)
showed inadequate values for the specific use of compost as a substrate.Moreover, the ionic composition of the aqueous solution with respect to its
main nutrients (N, P and K) is unbalanced.
If composted properly with other supplementary materials rich in nitrogen,
green waste would be a suitable product to use in substrate mixtures.